Pests

Cherry Slug Sawfly

How to identify: The adult insect is black, shiny, up to 8–9 mm long, resembling a small wasp. However, the main damage is caused by the larvae – they are covered in black slime, hence the name. The larvae are up to 10 mm long and resemble small leeches (Mikheev & Revyakina, 2004).

Type of damage: The larvae scrape the flesh from the upper side of the leaf, leaving only a skeleton of veins. Leaves become translucent, turn brown, and drop prematurely. With mass reproduction, a tree can be completely defoliated by midsummer.

Life cycle: Mature larvae overwinter in the soil at a depth of 10–15 cm. In late spring, they pupate, and in July, adults lay eggs into the leaf flesh. One generation develops per season (Mikheev & Revyakina, 2004).

What to do:

1. Digging the tree-trunk zones in autumn and spring destroys overwintering larvae. Digging depth – 10–15 cm.

2. Manual collection – with small numbers, larvae can be shaken from branches onto a tarp and destroyed. The larvae are clearly visible and not fast-moving.

3. Biopesticides – spraying with products based on Bacillus thuringiensis is effective against young larvae (Quero-García et al., 2017).

4. Chemical control – in case of mass appearance, apply products based on malathion (carbophos) or inta-vir immediately after harvest, when the pest is most active (Mikheev & Revyakina, 2004).

Important: Spraying should be done when the first larvae appear. Treating adults is useless – they no longer feed on leaves.

Leaf-Chewing Caterpillars (golden-tail moth, hawthorn caterpillar, various moths)

How to identify: Caterpillars have characteristic coloration and behavior. For example, golden-tail moth caterpillars are brightly colored, hairy, with red spots on their backs. They are often found in web nests on branches.

Type of damage: Caterpillars eat leaves from the edges or completely, leaving only the petioles. Some species roll leaves into tubes or tie them with web, creating shelters (Brunner, 1996).

Life cycle: Most caterpillars overwinter as eggs or young caterpillars in bark crevices, under loose bark, or in web nests. In spring, they become active along with bud break.

What to do:

1. Winter inspection and removal of nests – web cocoons and clusters of dry leaves tied with web are visible on branches. These are cut off and burned.

2. Sticky barriers (tree bands) in spring help capture caterpillars climbing up the trunk after wintering.

3. Biopesticides – Bacillus thuringiensis is effective against young caterpillars, especially in warm weather (above 15°C) (Quero-García et al., 2017).

4. Chemical insecticides are applied when pests are abundant, but selective products that are safe for beneficial insects are preferred.

Leafrollers

How to identify: Leafroller caterpillars are green or grayish-green, up to 2 cm long. A distinctive feature is that they roll leaves into a tube or tie them with web into a lump, inside which they feed (Brunner, 1996).

Type of damage: Leaves are curled and eaten from the inside. With severe damage, young shoots may die. In European countries, leafrollers are considered secondary pests, but under favorable conditions, their numbers can increase sharply (Quero-García et al., 2017).

What to do:

1. Pheromone traps help monitor moth flight and time protection measures accurately.

2. Manual collection of curled leaves with caterpillars inside.

3. Biological products – effective against younger caterpillars.

4. Pheromone disruption – used in commercial orchards to disrupt mating, sharply reducing the next generation's numbers (Quero-García et al., 2017).

Cherry Aphid (Black Cherry Aphid)

How to identify: Small (up to 2 mm), black, shiny insects that cluster in large colonies on the tips of young shoots and the underside of leaves (Mikheev & Revyakina, 2004). Ants running along branches are a sure sign of aphid presence – they feed on the aphids' sweet secretions.

Type of damage: Leaves curl downward, become deformed; shoot tips become bent and stop growing. With severe infestation, shoots may dry out. Sticky honeydew coats leaves and fruit, on which sooty mold develops, further weakening the plant.

Life cycle: Aphids overwinter as eggs at the base of buds on young branches. In spring, with the onset of bud break, larvae emerge, quickly becoming founding females that give rise to new generations (Mikheev & Revyakina, 2004). Several generations occur per season. In summer, winged individuals appear and fly to cherry root suckers and weeds, returning to the tree in autumn to lay overwintering eggs.

What to do:

1. Removal of root suckers and destruction of weeds – especially bedstraw, on which aphids reproduce in summer. This breaks the pest's life cycle.

2. Monitoring – regular inspection of young shoots from the start of bud break. Early colonies can easily be removed mechanically (by pruning affected shoots).

3. Biological methods – attracting lady beetles and lacewings. These predators are natural enemies of aphids. Avoiding broad-spectrum insecticides helps preserve their populations.

4. Home remedies – spraying with infusions of tobacco, garlic, onion skins, wood ash with soap is effective in early stages and safe for beneficial insects (Mikheev & Revyakina, 2004).

5. Chemical control – when numbers are high, apply insecticides (inta-vir, decis, carbophos) during bud break and again when new colonies appear. It is important to rotate products from different groups to prevent resistance.

Important: Aphid treatments should begin as early as possible – before leaves start curling. In curled leaves, aphids become inaccessible to many contact products.

Spider Mites

How to identify: Mites are very small (0.3–0.5 mm) and difficult to see with the naked eye. A sign of their presence is fine webbing on the underside of leaves and between branches (Brunner, 1996). The mites themselves are often reddish or yellowish-green.

Type of damage: Small light spots (puncture marks) appear on leaves; then the leaf becomes mottled, yellow, and dries out. With severe infestation, webbing covers entire branches, and the tree loses foliage prematurely.

Life cycle: Females overwinter in bark crevices, under fallen leaves. In spring, they emerge and begin laying eggs on the underside of leaves. In hot, dry weather, reproduction is rapid – one generation can develop in 10–14 days (Brunner, 1996). Up to 6–8 generations can occur per season.

What to do:

1. Maintaining humidity – mites do not like humid air. During dry periods, spraying the canopy with water (not during hot hours to avoid sunburn) is beneficial.

2. Controlling dust – dust on leaves promotes mite reproduction. Regular overhead irrigation washes off dust and creates unfavorable conditions for the pest (Westwood, 1993).

3. Biological methods – predatory mites (Phytoseiulus persimilis, Amblyseius fallacis) effectively control spider mite populations. They can be purchased from specialized centers (Long et al., 2021).

4. Acaricides – when populations are high, use specific products against mites (e.g., sulfur-based or oil emulsions). Important: conventional insecticides do not work on mites! They can even trigger outbreaks by destroying the mites' natural enemies (Brunner, 1996).

5. Dormant oil – early spring spraying with mineral oils on dormant buds effectively kills overwintering eggs and females (Long et al., 2021).

Important: Do not apply pyrethroids and carbamates when mites are present – these products are highly toxic to predatory mites and have little effect on spider mites (Long et al., 2021).

Cherry Bud Moth

How to identify: A small, colorful moth with a wingspan of up to 12 mm. The caterpillar is yellowish-green with a dark head, up to 8–10 mm long (Mikheev & Revyakina, 2004). Damaged buds and young shoots resemble frost damage – this is an important diagnostic sign.

Type of damage: Caterpillars bore into buds – they dry out. Then they move to young leaves, covering them with web. When buds appear, caterpillars eat the stamens and pistils. Leaves become curled, with brown areas – mines. A winding track that widens toward the end is usually visible on the leaf.

Life cycle: Eggs overwinter near buds. In spring, emerging caterpillars immediately penetrate the buds. In late May – early June, caterpillars go into the soil at a depth of 3–5 cm to pupate. In early July, moths emerge and lay eggs for overwintering (Mikheev & Revyakina, 2004). One generation per season.

What to do:

1. Autumn digging of tree-trunk zones – destroys pupae in the soil.

2. Early spring spraying – before bud break, apply mineral oils or malathion-based products to destroy overwintering eggs.

3. Spraying during caterpillar emergence – most effective when caterpillars have just hatched and have not yet entered the buds. Apply inta-vir, decis, or other approved insecticides (Mikheev & Revyakina, 2004).

Important: Treatment timing is critical. If you are late, the caterpillars will be inside the buds and inaccessible to contact products.

Cherry Fruit Sawfly

Unlike the slug sawfly that damages leaves, the fruit sawfly attacks flowers and fruit sets.

How to identify: Adults resemble small wasps (or flies) with transparent wings. Larvae are greenish-white or yellowish, with 8 pairs of legs, up to 10 mm long, found inside the fruit set or young fruit (Westwood, 1993).

Type of damage: Females lay eggs in buds or newly opened flowers. Larvae feed on the ovary, eating it from within. Damaged flowers turn brown and drop; fruit sets do not develop. Sometimes larvae move to young leaves, but the main damage is loss of flowers and fruit sets.

Life cycle: Larvae overwinter in the soil or in bark crevices. In spring, they pupate; adults emerge by the start of flowering. Females lay eggs in buds or flowers. Larvae develop inside for 2–3 weeks, then drop to the ground and pupate. Usually one generation per year (Westwood, 1993).

What to do:

1. Digging tree-trunk zones in autumn and early spring destroys overwintering larvae.

2. Spraying during bud formation and at the start of flowering. Products: pyrethroids, malathion, inta-vir (following instructions and considering bee safety).

3. Sticky bands on trunks sometimes help trap larvae descending into the soil.

Bark Beetles (Scolytidae)

How to identify: Small beetles (2–5 mm), dark brown or black. Larvae are white, legless, with a brown head. The most common on cherries is the shothole borer (Scolytus rugulosus) (Brunner, 1996). Adult beetles bore entry holes around which gum or frass often appears (Westwood, 1993).

Type of damage: Beetles and larvae excavate tunnels under the bark, cutting through conductive tissues. Small round holes (1–2 mm in diameter) appear on branches and the trunk, from which sap oozes or brownish dust – frass (a mixture of wood dust and excrement) – falls. Branches above the damage site dry up. With massive infestation, the tree can die within a year.

Life cycle: Larvae or adults overwinter under bark or in wood. In spring, beetles emerge and infest weakened trees. Females excavate maternal galleries and lay eggs. Larvae develop for 1–2 months, then pupate. In warm regions, there can be 2 generations per season (Brunner, 1996).

What to do:

1. Prevention is the main weapon. Bark beetles attack only weakened trees. Provide the cherry with good watering, nutrition, protection from frost cracks and sunscald. Remove dry and diseased branches in a timely manner.

2. Early detection. Regularly inspect trunks and main branches, especially in June–July when beetles are active. See frass or holes – act immediately.

3. Removal of infested branches. If a single branch is affected, cut it off and burn it. The cut should be made 10–15 cm below the last hole to remove all tunnels (Westwood, 1993).

4. Trap trees. In early spring, you can lay out fresh cut branches of cherry (or other fruit trees) – they attract bark beetles, which colonize them; then these branches are burned before the new generation emerges.

5. Insecticide treatments of the trunk. In commercial orchards, spraying trunks and large branches with contact insecticides (pyrethroids) is used during beetle flight. For amateur gardens, this is labor-intensive but justified if threat is high. Treatments are carried out according to instructions, considering pre-harvest intervals (Long et al., 2021).

Metallic Wood Borers (Buprestidae)

How to identify: Adult beetles are brightly colored, with metallic shine (copper, bronze, green), up to 12 mm long. Larvae are flat, legless, whitish, with an enlarged front part of the body (hence the name "flat-headed borers") (Westwood, 1993).

Type of damage: Larvae gnaw wide, winding, flat tunnels under the bark and in the surface layers of wood, often completely girdling a branch or trunk (Westwood, 1993). Cracks, peeling, and sunken areas are visible on the bark. Young trees are particularly vulnerable – larvae can sever conductive tissues around the entire circumference, leading to death.

Life cycle: Larvae overwinter in the wood. In spring, they pupate; beetles emerge in June–July. Females lay eggs in bark crevices, often on the sunny side of the trunk. Larvae develop for 1–2 years (Westwood, 1993).

What to do:

1. Protect trunks from sunscald. Whitewashing trunks and skeletal branches in spring and autumn prevents bark cracks, where borers readily lay eggs. Use water-based paint or special garden whitewash.

2. Removal of affected branches with a margin of healthy tissue.

3. Wrapping trunks (for young trees) with thick paper or burlap during the summer can prevent egg laying.

4. Insecticides – spraying trunks and large branches with pyrethroid-based products during beetle flight (usually June–July). Repeat the treatment after 2–3 weeks (Long et al., 2021).

Clearwing Moths (Synanthedon exitiosa – peachtree borer, and other species)

How to identify: Adults are clear-winged moths resembling wasps. Caterpillars are white or cream-colored, with a brown head, up to 25–38 mm long. The most dangerous is the peachtree borer, which also damages cherries (Brunner, 1996; Long et al., 2021). The cherry clearwing moth (Synanthedon myopaeformis) is found in Europe (Quero-García et al., 2017).

Type of damage: Caterpillars bore under the bark at the base of the trunk, into the root collar, and into large branches, making tunnels in the phloem and cambium. The damaged area exudes gum, often mixed with frass and caterpillar excrement (Brunner, 1996). Leaves on affected branches turn yellow and drop; branches die. If the trunk is girdled, the tree dies.

Life cycle: Caterpillars of various ages overwinter under bark or in wood at the base of the trunk. In spring, they continue feeding, pupating in late spring – early summer. Moths emerge in June–July, laying eggs in bark crevices near the ground. Caterpillars enter the bark and feed all summer and the following spring. One generation per year (Brunner, 1996).

What to do:

1. Regular inspection of trunk bases for gum and frass. Especially important for young trees and those on dwarf rootstocks.

2. Cleaning and treating wounds. If tunnels are found, clean the bark, remove caterpillars (you can use wire to extract them), treat the wound with garden sealant or special paste.

3. Whitewashing and protecting the trunk from mechanical damage and sunscald.

4. Pheromone traps to monitor moth flight help determine timing for protective treatments (Long et al., 2021).

5. Insecticide treatments – spraying the lower part of the trunk and the soil around it during moth flight with pyrethroid, malathion, or chlorpyrifos-based products (following safety rules and pre-harvest intervals). Treatments are repeated every 3–4 weeks (Brunner, 1996).

Wood Borers (e.g., American plum borer – Euzophera semifuneralis)

How to identify: Moths are grayish-brown, with a wingspan of up to 28 mm. Caterpillars are up to 15–20 mm long, pinkish-white with a dark head, often with a reddish tint. They attack old trees, entering through wounds, cracks, and pruning cuts (Long et al., 2021).

Type of damage: Caterpillars gnaw extensive tunnels in the cambium and phloem, often girdling branches, leading to their death. Sunken areas, cracks, gum, and frass are visible on the bark (Long et al., 2021).

Life cycle: Caterpillars overwinter in tunnels under the bark. In spring, they pupate; moths emerge in May–June. Females lay eggs in fresh wounds, cracks, and pruning cuts. Caterpillars develop all summer; in warm regions, they may produce 2 generations (Long et al., 2021).

What to do:

1. Careful pruning – all cuts larger than 1 cm should be covered with garden sealant or paint based on natural drying oil. This prevents pests from entering through wounds (Krivko, 2014).

2. Timely removal and burning of affected branches.

3. Wound treatment. If a caterpillar has already entered, it can be extracted with wire, then the wound should be cleaned and covered.

4. Monitoring with pheromone traps and insecticide treatments of trunks during the flight period (Long et al., 2021).

Scarab Beetle Grubs (Chafer grubs) and Other Scarabaeidae

How to identify: Large (up to 2–3 cm), fleshy, white or yellowish larvae with a brown head, three pairs of legs, always curved in a "C" shape. They live in the soil, feeding on roots (Westwood, 1993). Adult beetles are large, brown or black, with lamellate antennae.

Type of damage: Larvae eat fine roots and gnaw on large roots and the root collar. Young saplings can be completely destroyed. Adult trees with severe root damage weaken, grow poorly, reduce yield, and become susceptible to diseases and other pests.

Life cycle: Beetles emerge in spring, mate, and females lay eggs in the soil at a depth of 10–20 cm. Larvae develop in the soil for 2–3 years, overwintering deep (up to 50–60 cm). During the season, they feed actively during the warm period (Westwood, 1993).

What to do:

1. Deep digging of the soil in autumn and spring – larvae are brought to the surface and die from frost or drying, and also become accessible to birds.

2. Manual collection during digging – if there are few larvae, they can be picked out and destroyed.

3. Application of entomopathogenic nematodes to the soil (e.g., Heterorhabditis bacteriophora) – they effectively attack chafer grubs. This is a biological and safe method (Quero-García et al., 2017; Long et al., 2021).

4. Trapping adult beetles. In May–June, beetles can be shaken from trees early in the morning when they are sluggish and destroyed (Westwood, 1993).

5. Soil insecticides are used only when numbers are high and on small plots, using products approved for soil application, strictly according to instructions.

Wireworms (Click Beetle Larvae)

How to identify: Thin, hard, yellowish-brown worm-like larvae up to 25 mm long with a shiny hard shell. They live in the soil, feed on roots, and bore into root crops and tubers (Westwood, 1993). On cherries, they damage young saplings and the root system.

Type of damage: Larvae eat small roots and may damage the root collar. They are particularly dangerous for young trees and when planting an orchard on land previously under sod (Westwood, 1993).

What to do:

• Deep digging and loosening of the soil.
• Setting traps – pieces of potato or beet buried in the soil attract wireworms; they are periodically dug up and destroyed.
• Liming of acidic soils, as wireworms prefer acidic environments.
• Application of nematodes (same as against chafer grubs) – they also attack wireworms (Long et al., 2021).

Root Aphids

How to identify: Small (1–2 mm) insects living on roots. They are difficult to see, but signs of their presence are stunted tree growth, leaf chlorosis, and lagging development. Sometimes white waxy secretions are visible on roots (Westwood, 1993).

Type of damage: Aphids suck sap from roots, weakening the tree. They are often vectors of viruses and contribute to root infection by fungal diseases. They are particularly dangerous for young trees and nursery saplings.

What to do:

• Selection of resistant rootstocks. Some rootstocks are resistant to root aphids (e.g., certain cherry and plum forms) (Trunov & Samoshchenkov, 2012).
• Soil drenching with insecticides when infestations are detected (cautiously, using only approved products).
• Use of systemic insecticides applied to the soil and absorbed by roots (in commercial orchards).

Removal of Plant Debris

What to do:

• In autumn, after leaf fall, thoroughly rake all fallen leaves and burn them or put them in a compost pile (but only if you are sure they are not infected with diseases). Leaves harbor pathogens of coccomycosis, clusterosporiosis, as well as cherry fruit fly pupae and sawfly larvae (Mikheev & Revyakina, 2004).
• Collect and destroy all mummified fruits remaining on the tree or fallen to the ground. They harbor moniliosis spores and larvae of some pests (Buckingham, 2010).
• Remove fallen fruit during the ripening period and after harvest. This prevents cherry fruit fly and weevil larvae from entering the soil (Brunner, 1996).

Why it works: Most pests and diseases cannot overwinter without plant debris. Depriving them of shelter sharply reduces their starting numbers in spring.

Pruning and Canopy Cleaning

What to do:

• Perform sanitary pruning annually, removing dry, broken, diseased, and overcrowding branches. Cover all cuts larger than 1 cm with garden sealant or paint based on natural drying oil (Krivko, 2014).
• Clean trunks and main branches of dead bark, moss, and lichens. Aphid eggs, caterpillar cocoons, and adult mites overwinter under them (Westwood, 1993). Use a metal brush or scraper, but do not damage the living bark.
• Remove root suckers and water sprouts. They thicken the canopy and serve as additional shelter for pests, especially aphids (Mikheev & Revyakina, 2004).

Why it works: An open, well-ventilated canopy is less attractive to pests. Additionally, pruning stimulates new shoot growth, but if there are too many, they attract aphids. Removing excess growth reduces the food base for sap-sucking pests.

Soil Cultivation

What to do:

• In autumn, dig the tree-trunk zones to a depth of 15–20 cm, turning the soil over. This destroys overwintering cherry fruit fly pupae, weevils, sawfly larvae, and chafer grubs in the soil (Mikheev & Revyakina, 2004; Westwood, 1993).
• In spring, repeat shallow loosening (8–10 cm) to destroy pupal chambers and hinder adult insect emergence.
• Mulch the tree-trunk zones with peat, humus, or compost in a layer of 5–8 cm. Mulch suppresses weed growth, retains moisture, and creates unfavorable conditions for many pests that prefer open, dry soil (Buckingham, 2010).

Why it works: Many pests spend part of their life cycle in the soil. Digging disrupts their development, bringing them to the surface where they die from frost, drying, or become prey for birds.

Weed Control

What to do:

• Regularly remove weeds, especially in tree-trunk zones and row middles. Many weeds (bedstraw, chickweed, sow thistle) serve as intermediate hosts for aphids, which move onto them in summer and return to cherries in autumn (Mikheev & Revyakina, 2004).
• Mow grass in row middles, preventing it from flowering and seeding. This reduces the numbers of mites, thrips, and other pests.

Why it works: Weeds are “transfer points” for pests. Destroying them breaks life cycles and reduces the overall pest population in the garden.

Visual Inspection

What and when to inspect:

• Early spring (before bud break): check branches for overwintering aphid eggs (visible as black shiny dots at the base of buds), caterpillar cocoons, scale covers. Inspect trunks for cracks and holes (Mikheev & Revyakina, 2004).
• "Green cone" stage (beginning of bud break): inspect young leaves for aphids, sawfly larvae, and mining moths.
• Flowering and fruit set period: check flowers and fruit sets for weevil egg-laying scars and sawfly feeding signs.
• Fruit ripening stage: regularly inspect fruits for puncture marks, spots, and deformations. Cut open suspicious fruits to find fly or fruitworm larvae.
• Throughout the season: pay attention to curled leaves, webbing, and ants on branches (a sign of aphids).

How to inspect: Choose several trees in different parts of the garden (at least 10% of the total). Inspect branches from all sides: upper, middle, and lower canopy levels, sunny and shaded sides. Use a magnifying glass (10–20x) to detect small pests (Brunner, 1996).

Traps

Pheromone traps are sticky traps with a pheromone lure that attracts males of a specific insect species. They allow precise determination of the start of flight and the peak of pest activity.

For which pests are they used:

• Cherry fruit fly: yellow sticky traps with an ammonium lure (Rebell, other models) (Quero-García et al., 2017).
• Leafrollers and fruitworms: pheromone traps for each species (Brunner, 1996).
• Clearwing moths and bark beetles: pheromone traps for monitoring flight.

How to use: Traps are hung in the canopy at the beginning of the season (before the expected pest emergence). They are checked daily or every other day, counting the number of trapped insects. The first individual in the trap signals the start of protective measures (Quero-García et al., 2017). The number of trapped individuals allows assessing population density and the need for treatments.

Sticky traps (without pheromone) help detect the presence of aphids, whiteflies, and small flies.

Economic Thresholds

Monitoring allows comparing the current pest population with the economic injury level (EIL) – the population level at which the damage caused by the pest exceeds the cost of control measures.

Examples of approximate EILs for cherries:

• Cherry aphid: 2–5 colonies per 100 young shoots (Brunner, 1996).
• Cherry fruit fly: catch of 1–3 flies per trap per week (Quero-García et al., 2017).
• Leafrollers: more than 30 moths per trap per week (Quero-García et al., 2017).

In a home garden, the EIL may be lower because you aim for flawless fruit. But even then, use threshold values to avoid applying pesticides without real need.

Beneficial Insects – Who Are They?

Predators (eat many pests):

• Lady beetles – both adults and larvae feed on aphids, scale insects, and mites. One lady beetle can eat up to 100 aphids per day (Brunner, 1996).
• Lacewings – lacewing larvae are active predators, feeding on aphids, sawfly larvae, and caterpillars.
• Hover flies (syrphids) – their larvae feed on aphids. Adult flies pollinate flowers.
• Predatory mites (Phytoseiulus, Amblyseius, Typhlodromus) – effectively control spider mites (Long et al., 2021).
• Ground beetles, rove beetles – hunt pest larvae in the soil.

Parasites (parasitoid wasps, some flies):

• Lay eggs inside the pest's body (caterpillar, aphid, larva). The parasitoid larva develops at the host's expense, killing it. Many parasitoid species are specialized on specific pests (aphid parasitoids, egg parasitoids, larval parasitoids) (Brunner, 1996; Quero-García et al., 2017).

Birds: Tits, starlings, woodpeckers, nuthatches, and many others actively eat insects and their larvae throughout the season.

How to Attract and Preserve Beneficial Insects

1. Minimize the use of broad-spectrum insecticides. They kill not only pests but also their natural enemies. Use selective products (e.g., Bacillus thuringiensis, spinosad, insecticidal soaps) that target only specific pest groups and are safe for beneficial insects (Long et al., 2021).

2. Create a food source for adult beneficial insects. Many predators and parasites need nectar and pollen for nutrition in their adult stage. Plant nectar-producing flowering plants in rows or around the garden perimeter: dill, parsley, coriander, phacelia, mustard, buckwheat, and various composites (Buckingham, 2010). They will attract beneficial insects and support their populations.

3. Use biopesticides. Instead of chemical insecticides, use biological products based on bacteria (e.g., Bacillus thuringiensis against caterpillars), entomopathogenic fungi (Beauveria bassiana), or release predatory mites and parasitoids in the garden (this is called biological control) (Long et al., 2021).

4. Leave islands of natural vegetation (hedgerows, small meadows with wildflowers) – they serve as shelter and additional food sources for beneficial insects.

5. Do not remove leaves and mulch too late in autumn – many beneficial insects (ground beetles, spiders, parasitoids) overwinter in them. If you remove leaves, compost them separately to allow beneficial insects to complete their life cycle.

6. Hang nest boxes and bird feeders, feed birds in winter – they will be grateful and help clean the garden of pests in summer.

Manual Collection and Shaking

Shaking off weevils. In early spring, when beetles have just appeared and are still sluggish (in cold weather, below +10°C), spread a dense cloth or tarp under the tree and shake the branches vigorously. Collect and destroy fallen beetles. Repeat this procedure every morning for 2–3 weeks while beetles are active (Mikheev & Revyakina, 2004).

Collecting caterpillars and their nests. In winter and early spring, inspect branches and remove winter nests of hawthorn caterpillars and golden-tail moth – they are clearly visible on bare branches. Cut off and burn the nests (Westwood, 1993).

Removal of curled leaves. If you notice isolated leaves curled by aphids or leafroller caterpillars, simply cut them off and destroy them along with the inhabitants. This prevents spread.

Collecting fallen fruit. During fruit ripening, collect fallen fruits daily, and in hot weather twice a day. They may contain developing larvae of cherry fruit fly, weevil, or fruitworm. Do not leave them under the tree – bury deeply or burn (Brunner, 1996).

Sticky Bands and Barriers

Sticky tree bands. These are strips of thick paper or cloth wrapped around the trunk and coated with non-drying glue. They block the path of caterpillars that overwintered in the soil and climb up the trunk in spring to the canopy (e.g., winter moth caterpillars). Bands are installed in early spring, before pests start moving (Brunner, 1996; Westwood, 1993).

Sticky tapes on branches. Yellow or red sticky traps hung in the canopy are used to catch cherry fruit flies. They also serve as monitoring tools.

Protective nets. Fine-mesh nets (mesh size less than 1 mm) covering the canopy completely prevent cherry fruit flies and other flying pests from accessing the fruits. This is an expensive but very effective method, especially in small plots. Nets are installed before fruit ripening and removed after harvest (Long et al., 2021; Quero-García et al., 2017).

Protection of trunks from rodents. Wrapping trunks with fine metal mesh, roofing felt, or special plastic protective sleeves saves bark from damage by mice and hares in winter. A wounded tree becomes easy prey for bark beetles and borers (Buckingham, 2010).

Soil Cultivation

Autumn digging. Dig the tree-trunk zones to a depth of 15–20 cm, turning the soil over. This destroys overwintering stages of cherry fruit fly, weevil, sawflies, and chafer grubs. Deeply buried pupae will not be able to emerge to the surface in spring (Mikheev & Revyakina, 2004; Westwood, 1993).

Spring loosening. Shallow (8–10 cm) loosening in spring destroys pupal chambers and hinders adult insect emergence from the soil.

Mulching. Mulch (peat, compost, humus, bark) not only improves the soil but also creates unfavorable conditions for many pests that prefer open, dry soil. Additionally, mulch makes it difficult for flies to emerge from pupae (Buckingham, 2010).

Use of Entomophages (Predators and Parasites)

Predatory mites. Against spider mites, predatory mites of the genera Phytoseiulus, Amblyseius, and Typhlodromus are used. They can be purchased from specialized biological control centers and released into the garden. Predatory mites effectively control spider mite populations, especially in greenhouses and small plots (Long et al., 2021; Brunner, 1996).

Parasitoids. Some parasitoid wasps specialize in specific pests. For example, Trichogramma is an egg parasitoid that lays its eggs in the eggs of fruitworms, leafrollers, and other Lepidoptera. It is released into the garden during the pest's egg-laying period (Quero-García et al., 2017).

How it works: The predator or parasite reproduces in the garden and naturally regulates the pest population. It is important not to use broad-spectrum insecticides that kill entomophages.

Biopesticides (Microbiological Agents)

These are products based on living microorganisms (bacteria, fungi, viruses) that cause diseases in pests. They are safe for humans, animals, beneficial insects, and the environment.

Bacillus thuringiensis (Bt). The most well-known and widely used biopesticide. The bacterium Bacillus thuringiensis produces toxins that affect the gut of caterpillars (Lepidoptera). Caterpillars stop feeding and die within 2–3 days. Bt is effective against caterpillars of leafrollers, moths, fruitworms, and hawthorn caterpillars. Important: the product acts only on young caterpillars, so treatment should be done early (Brunner, 1996; Long et al., 2021).

Spinosad. A biological insecticide based on fermentation products of the bacterium Saccharopolyspora spinosa. Effective against cherry fruit fly, thrips, caterpillars, and sawfly larvae. Approved for organic farming. Acts both by contact and through ingestion (Long et al., 2021; Quero-García et al., 2017).

Beauveria bassiana. An entomopathogenic fungus that infects many insects, including aphids, thrips, whiteflies, and bark beetles. Fungal spores germinate on the insect's body and penetrate inside, causing death (Long et al., 2021).

Entomopathogenic nematodes. Microscopic worms (e.g., Heterorhabditis bacteriophora, Steinernema feltiae) actively penetrate the bodies of soil-dwelling larvae (chafer grubs, wireworms, weevils), release symbiotic bacteria that kill the host, and reproduce inside it. This is a highly effective and safe method. Nematodes are applied to the soil with irrigation water (Quero-García et al., 2017; Long et al., 2021).

Attracting Beneficial Insects (Agroecological Methods)

Sowing nectar-producing plants. Sow dill, phacelia, mustard, buckwheat, parsley, coriander along the garden edges or in row middles. Flowering plants attract adult predatory flies (hoverflies), lacewings, and parasitoids that feed on nectar and pollen. They will hunt pests, and their offspring will continue the work (Buckingham, 2010).

Hedgerows and flower strips. Planting shrubs and flowering perennials along the garden perimeter creates shelter for beneficial insects and provides them with additional food during periods when pests are scarce.

Nest boxes and feeders. Attract birds by hanging nest boxes and feeding them in winter. Tits, starlings, nuthatches, and woodpeckers actively destroy pests at all developmental stages (Westwood, 1993).

Classification of Insecticides

By origin:

• Organic (biological): spinosad, Bacillus thuringiensis, neem, pyrethrum, insecticidal soap. They are safer for humans, bees, and beneficial insects but may be less effective against high pest populations.
• Synthetic: pyrethroids, neonicotinoids, organophosphates, carbamates. Highly effective but toxic to bees and beneficial insects, and require strict adherence to pre-harvest intervals (Quero-García et al., 2017; Long et al., 2021).

By mode of action:

• Contact – kill the pest upon direct contact. Require thorough coverage of the entire plant surface.
• Systemic – penetrate plant tissues and circulate within them, making the plant toxic to pests feeding on sap or tissues. Particularly effective against sap-sucking pests (aphids, mites) and hidden feeders (fly larvae inside fruit). Require strict pre-harvest intervals.
• Stomach – act when ingested with food (e.g., Bt).
• Fumigants – act through the respiratory system (rarely used in orchards).

Main Product Groups and Their Application

Rules for Safe Pesticide Application

1. Use only products approved for use on cherries. Read the label carefully: which pests, timing, dosages, pre-harvest intervals.

2. Observe treatment timing. For each pest, there is a critical window when it is most vulnerable:

• Against aphids and sawflies – at the green cone and budding stage.
• Against cherry fruit fly – when fruits begin to color, repeat after 7–10 days (Brunner, 1996).
• Against weevil – after flowering, repeat after 7–10 days (Mikheev & Revyakina, 2004).
• Against mites – early spring (oil products) or when signs of damage appear.

3. Observe pre-harvest intervals (withholding periods). This is the period from treatment to harvest, indicated on the label. For many products, it is 7–30 days. Never treat trees if the withholding period does not fit your harvest schedule.

4. Choose the right time for treatment. Spray early morning or late evening, when there is no wind and bee activity is minimal. Avoid treatment during hot sunny hours (can cause leaf burn) and before rain (product will be washed off).

5. Use personal protective equipment. Gloves, respirator, safety goggles, protective clothing. After work – take a shower, change clothes (Brunner, 1996).

6. Rotate products from different groups. Regular use of the same product leads to resistance in pests. Rotation is a mandatory condition for effective protection (Long et al., 2021).

7. Thoroughly cover all parts of the plant. The treatment should be uniform, on both sides of the leaves, over the entire canopy. For small gardens, use backpack sprayers.

8. Protect bees. Never treat flowering orchards with insecticides toxic to bees! Neonicotinoids and pyrethroids are particularly dangerous. Apply treatments before flowering or after, when petals have fallen (Long et al., 2021).

9. Do not exceed the dosage. More is not necessarily more effective. Exceeding the dosage can cause burns, damage beneficial insects, and lead to accumulation of toxic substances in the fruit.

10. Keep a treatment log. Record which products, when, and at what dosage you applied. This will help rotate products and avoid mistakes in the next season.