Tree Fruit Insects

    Tree Fruit Insects

    Apple Aphids

    Apple aphids

    Aphids are common, secondary pests of apples, but infestations resulting in economic loss are uncommon, except for woolly apple aphid. Aphids overwinter as eggs on tree limbs, or as nymphs on roots and/or limbs.
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    Apple Maggot

    apple maggot

    The fruit fly, apple maggot, primarily infests native hawthorn in Utah, but recently has been found in home garden plums. Apple maggot is a quarantine pest; its presence can restrict export markets for commercial fruit.
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    Apple and Pear Insect Control For Homeowners (Codling Moth)

    codling moth

    There are few experiences that equal biting into a crisp, flavorful apple; few worse than finding half a worm in the remaining portion. Worms infesting apples and pears are immature larvae of codling moth. 
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    Brown Marmorated Stink Bug

    brown marmorated stink bug

    Brown marmorated stink bug feeds on a broad range of plants including fruits, vegetables, field crops, ornamentals, weeds, and native species. Adult- and nymph-feeding causes light-colored stippling and lesions on leaves, necrotic lesions and scars on fruits, and deformed pods and seeds on legumes.Download

    Bumble Flower Beetle

    bumble flower beetle

    Bumble flower beetles are common throughout the growing season on flowers, oozing sap, and other sweet, overripe, or fermenting matter. Bumble flower beetles seldom warrant the use of chemicals for control.
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    Campylomma Bug

    campylomma bug

    A new pest to Utah apples; controls are recommended only if there has been a history of damage. Damaging stage: first generation nymphs feed on developing fruit. Monitor nymphs in the spring from pink through petal fall.
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    Campylomma Bug Sampling Form

    campylomma bug

    Cankerworms

    cankerworm

    Both spring and fall cankerworms occur sporadically in Utah, typically on a five to seven year cycle. Larvae feed for six weeks in the spring and cause heavy defoliation in outbreak years.
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    Cat-facing Insects of Tree Fruits

    cat-facing

    Cat-facing insects are sporadic pests in orchards, but can cause severe fruit injury when populations are high. Cat-facing adults and nymphs feed on the surface of fruit causing unsightly dimpling, deformity, and scarring.
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    Codling Moth

    codling moth

    Codling moth is the major pest of apple and pear in Utah. Damaging stage: larva tunnels into fruit. Monitoring stage: adult moth. Use of pheromone traps and the degree-day model (based on daily temperatures) are critical for determining optimal treatment timings.Download

    Codling Moth Sampling Form

    codling moth

    Codling Moth Mating Disruption

    codling moth

    Codling moth is a key pest of apples and pears. Mating disruption does not kill insects; it saturates the orchard with the female moth sex pheromone to delay or prevent mating. At least 10 contiguous acres are required for codling moth mating disruption to be effective.Download

    Eriophyid Mites, Bud, Blister, Gall, and Rust Mites

    eriophyid mites

    Eriophyid mites cannot be seen without a 20x hand lens or greater magnification. Eriophyid mites seldom cause serious injury or stress to plants; damage is normally aesthetic.
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    European Earwig

    european earwig

    The European earwig is an omnivore; it feeds on detritus, fungi, plants, and insects. Earwigs can injure the buds, leaves, flowers, and fruits of a broad range of plants, including fruits, vegetables, and ornamentals; they can be a nuisance pest by entering buildings.Download

    European Red Mite

    european red mite

    European red mite infestations are sporadic in Utah orchards, but injury can be severe when populations are high. Adult and immature mites feed on leaves causing white stippling, bronzing, and defoliation. Tree vigor and fruit color, size, and production.Download

    Flatheaded Borers (Pacific, Appletree)

    flatheaded borers

    Pacific flatheaded and flatheaded appletree borers are two wood-boring pests of many fruit and ornamental trees. The most susceptible trees are drought-stressed, newly planted, or those with trunk or limb wounds.
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    Greater Peachtree Borer

    greater peachtree borer

    Greater peachtree borer is an important pest of peach, nectarine, apricot, cherry, and plum. Adults are clearwing moths and larvae are caterpillars that burrow and feed in the cambium beneath the bark near or just below the soil line.
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    Intermountain Tree Fruit Production Guide 

    intermountain treefruit production guide

    Integrated pest management (IPM) involves collecting information about a pest and crop to ensure that you administer the most economical, effective, and environmentally and socially sound pest management decision.
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    Invasive Insect Look-alikes: Mistaken Identity 

    invasive insect

    Pest identification is the cornerstone of integrated pest management, but is a skill that can be difficult to master. Mistakes in identification are common, as many insects look and act alike, and/or can cause similar injury.
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    Leafrollers in Fruit Orchards

    leafroller

    Several species of leafrollers are economically important pests of tree fruits in North America. In Utah, injury to tart cherry crops from leafroller caterpillars prompted a 4 year survey for five species that are known to occur in the western U.S. Download

    Peach Twig Borer 

    peach twig borer

    Peach twig borer is a major pest of peach, nectarine and apricot in Utah. There are multiple generations each year. Spring and early summer generations of larvae bore into and kill new shoots while later summer larvae attack fruit, typically entering fruit near the stem end.Download

    Peach Twig Borer Sampling Form 

    peach twig borer

    Peach Twig Borer Mating Disruption 

    peach twig borer

    Peach twig borer is a key pest of peach, nectarine, and apricot. Mating disruption does not kill insects; it saturates the orchard with the female moth sex pheromone to delay or prevent mating.
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    Pear Psylla

    pear psylla

    Pear psylla is an important pest of pear in Utah. Young and adult psylla feed in leaf phloem tissues, producing sticky honeydew. Psylla can cause fruit russetting and stunt trees; psylla shock and transmission of pear decline can kill trees.
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    Pear Psylla Sampling Form 

    pear psylla

    Pear Sawfly 

    pear sawfly

    Pear sawfly hosts include pear, cherry, hawthorn, plum, buttonbrush, Juneberry, mountain ash, cotoneaster, and quince. There are 2 generations of pear sawfly each year; second generation larvae cause the majority of the damage.
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    Pest Monitoring Calendar - Apple 

    apple

    Pest Monitoring Calendar - Apricot 

    apricot

    Pest Monitoring Calendar - Cherry 

    cherry

    Pest Monitoring Calendar - Peach and Nectarine 

    peach and nectarine

    Pest Monitoring Calendar - Pear 

    pear

    Pest Monitoring Calendar - Plum 

    plum

    Prionus Root Borer 

    prionus root borer

    This long-horned beetle is native to western North America and lives for 3 years or more underground, feeding on tree roots. Severe infestations can cause the death of stone fruit trees.
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    San Jose Scale 

    san jose scale

    San Jose scale is a sporadic pest in well maintained commercial fruit orchards. Severe infestations can kill limbs, cause deformed and poor colored fruit, reduce yields, and eventually kill trees.
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    Shothole Borer 

    shothole borer

    Shothole borers can cause damage to ornamental and fruit trees in Utah and adults are present from spring to early fall. Stressed or injured trees are more prone to attack.
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    Soft Scale in Utah 

    soft scale

    There are more than 1,000 different species of soft scales found throughout the world. Less than 5% are considered serious pests.
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    Speckled Green Fruitworm 

    speckled green fruitworm

    Fruitworms chew holes in fruits and leaves, and can cause localized defoliation of fruit trees. Fruitworms can be monitored with beat-samples (abrupt shaking of tree branches over a tray).
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    Spider and Predatory Mites Sampling Form 

    spider mites

    Spotted Wing Drosophila 

    spotted wing drosophila

    Spotted Wing Drosophila (SWD) is a new Utah pest (first found August, 2010) that can infest un-ripened (pre-harvest), ripe, over-ripe, and spoiled fruits. SWD attacks a broad range of fruits, including tree fruits, berry fruits, and vegetable fruits.
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    Spotted Wing Drosophila Monitoring 

    spotted wing drosophila

    The Backyard Orchard - Apple Pests 

    apple

    The Backyard Orchard - Apricot Pests

    apricot

    The Backyard Orchard - Cherry Pests 

    cherry

    The Backyard Orchard - Peach and Nectarine Pests 

    peach and nectarine

    The Backyard Orchard - Pear Pests

    pear

    The Backyard Orchard - Plum Pests 

    plum

    Utah Home Orchard Pest Management Guide 

    orchard

    Integrated pest management (IPM) is the practice of combining knowledge of the pest and host plant with multiple tactics for long-term, safe pest control. The goal of IPM is pesticide reduction by using cultural, mechanical, and biological controls before the last option, pesticides.Download

    Walnut Husk Fly 

    walnut husk fly

    Walnut husk fly infests black and English walnuts, and late-maturing apricot and peach fruits when infested walnuts are nearby. Damage is caused by egg-laying punctures and larvae developing inside husks and fruits.
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    Web Spinning Spider Mites 

    web spinning spider mites

    Spider mites feed on a wide range of plants, including fruit trees, field and forage crops, ornamentals, and weeds. Adult and immature mites feed on leaves causing white stippling, bronzing, and defoliation.
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    Western Cherry Fruit Fly 

    western cherry fruit fly

    Western cherry fruit fly is the primary insect pest of sweet and tart cherries in Utah. Damage occurs from the larva developing inside fruit. Females lay eggs under the skin of fruit, so target adult flies for control.
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    Western Flower Thrips 

    western flower thrips

    Western flower thrips (WFT) are a frequent pest of nectarine, and an occasional pest of apple and other fruits in Utah. WFT can be abundant on numerous weed and crop hosts.
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    Western Tentiform Leafminer 

    western tentiform leafminer

    Western tentiform leafminer is an indirect pest that mines the leaves of apple and cherry. It can diminish the photosynthetic capability of trees and reduce fruit size and quality. Leafminer populations can fluctuate dramatically within and between years.Download

    Western Tentiform Leafminer Sampling Form - Apple and Cherry 

    western tentiform leafminer

    White Apple Leafhopper 

    white apple leafhopper

    White apple leafhopper is an indirect pest with two generations per year. Decision for control should be based on economic justifications as well as orchard and other pest considerations.
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    White Apple Leafhopper Sampling Form 

    white apple leafhopper