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Item Name: Oak Aphid Tuberculatus probably quercicola sp)
Date: 2/21/03
City/Area: Prescott, AZ
Description of Conditions: Found on summer deciduous oaks.
Control Strategy: Soap spray if needed.
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Item Name: Oyster Shell Scale (Lepidosaphes ulmi)
Date: 6/1/02
City/Area: Prescott, AZ
Description of Conditions: Colonizing twigs of an aspen tree.
Control Strategy: Use a dormant oil prior to bud break or a Superior oil during summer. Natural predators can afford some control when populations are small. |
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Item Name: Oyster Shell Scale eggs on aspen (Lepidosaphes ulmi)
Date: 1/1/01
City/Area: Prescott, AZ
Description of Conditions: Attach to twigs and branches; heavy infestation can weaken and kill plant.
Control Strategy: Dormant oil in winter.
Oyster Shell Scale |
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Item Name: Peach Tree Borer larvae (Synanthedon exitiosa)
Date: 6/3/98
City/Area: Prescott, AZ
Description of Conditions: Feeds under bark through summer & moves down trunk as cold weather approaches. Symptoms: frass at base of tree or globs of sap exuding from base of tree indicate larval entry points; weakend tree (droopy leaves & dying branches).
Control Strategy: Dig out larva with pocket knife; for heavy infestations, insecticides or parasitic nematodes are effective during early larval stages; white paint on bark at base of tree helps seal cracks where female moths lay eggs. |
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Item Name: Peach Twig Borer (Anarsia lineatella)
Date: 7/22/05
City/Area: Prescott, AZ
Description of Conditions: Larvae enter fruit at stem end.
Control Strategy: Spray with bacillus thuringiensis (BT) during bloom time; disrupt mating with pheromones. Has multiple natural enemies.
Twig Borer Damage |
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Item Name: Pine Engraver Beetle (Ips sp.)
Date: 11/18/02
City/Area: Prescott, AZ
Description of Conditions: Drought stressed forest.
Control Strategy: Deep, infrequent irrigation during dry periods. Preventative insecticide treatments can also be used.
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Item Name: Pine Sawfly larva
Date: 8/24/04
City/Area: Prescott, AZ
Description of Conditions: Often attached to stressed trees. Feeds on old and new needles and tender bark of young twigs; can defoliate tree in short time.
Control Strategy: Handpick; shake off; prune from tree and destroy; insecticidal soap; insecticides (ingredients such as: acephate, bifenthrin, carbaryl, permethrin).
Pine Sawfly larvae |
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Item Name: Pinion Webworm
Date: 8/20/03
City/Area: Prescott, AZ
Description of Conditions: More often found on trees not surrounded by other trees. High populations can defoliate tree but do not kill it. Rare in Prescott area.
Control Strategy: Prune & destroy infested portion of branches while webs are small. Remove large webs with a stick or pole w/ nail inserted crosswise – twist pole after insertion into web – remove and bag or burn. Only use insecticide sprays (BT, carbaryl, acephate) if natural predators (wasps, birds, stink bugs, parasitic flies) are not present. |
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Item Name: Pinyon Needle Scale Crawler
Date: 11/20/01
City/Area: Prescott, AZ
Description of Conditions: Drought conditions.
Control Strategy: Clean up egg mass; spray crawlers with malathion when active; spray horticultural oil on scale during summer as temperatures permit.
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Item Name: Pinyon Needle Scale Egg Mass
Date: 11/20/01
City/Area: Prescott, AZ
Description of Conditions: Drought conditions.
Control Strategy: Clean up egg mass, spray crawlers with malathion when active; spray horticultural oil on scale during summer as temperatures permit.
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Item Name: Pitch Moth Larva
Date: 7/26/00
City/Area: Prescott Valley, AZ
Description of Conditions: Feeding on Elderica pine.
Control Strategy: Irrigate tree, provide care, no control recommended. |
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Item Name: Poplar Gall Aphid
Date: 6/4/04
City/Area: Prescott, AZ
Description of Conditions: Feeding aphids cause swellings or galls to form on leaves.
Control Strategy: Does not damage trees; no control required. |
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Item Name: Red and Black Striped Blister Beetle (Megetra probably vittata sp.)
Date: 8/21/03
City/Area: Chino Valley, AZ
Description of Conditions: Found on ground; rarely seen.
Control Strategy: Control generally not needed. |
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Item Name: Say's Plant Bug (Chlorochroa sayi)
Date: 4/2/02
City/Area: Cottonwood, AZ
Description of Conditions: Crawling on willow tree. This insect is known to feed on peaches, asparagus, beans, sunflower, grasses, and weeds. Overwintering bugs are known to feed on curly dock and mullien.
Control Strategy: Clean cultivation of orchards in fall will discourage overwintering bugs. If bugs are found, apply an insecticide to the ground cover to kill adults before they move out of the orchard to other hosts. Formetanate Hydrochloride (Carzol) and Endosulfan (Thiodan) are labelled for use on fruit trees to control stink/plant bugs.
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Item Name: Seed Bug (Melanopterus belfragei)
Date: 8/26/02
City/Area: Prescott, AZ
Description of Conditions: Over- wintering under house.
Control Strategy: None needed. |
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Item Name: Shot Hole Borer on peach
Date: 10/25/04
City/Area: Prescott, AZ
Description of Conditions: Emerging adults create small holes in bark; often attack sun-burned trees or trees low on water or nutrients.
Control Strategy: Remove & burn infested stems or twigs. White latex paint on young tree trunks can help prevent sunburn. |
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Item Name: Snailcase Bagworm on apple
Date: 6/13/12
City/Area: Prescott, AZ
Description of Conditions: The snailcase bagworm (also known as the garden bagworm) was recorded for the first time in Arizona in Prescott during the summer of 2011. The coiled, silk case is covered with soil particles and excrement. The 2011 sample was from the Sweet Acres area off of Senator Hwy. In 2012, it was found in the Government Canyon area on Butterfield Rd. It is a nuisance insect that can eat vegetable and flower seedlings. It also skeltonizes leaves but had not caused lasting damage to the apple tree in the photo.
Control Strategy: Apply carbaryl dust, kaolin clay dust, or diatomaceous earth where feeding is occurring. |
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Item Name: Sycamore Tussock Moth cocoon (Halysidota harrisii)
Date: 6/11/98
City/Area: Sedona, AZ
Description of Conditions: Found in summer.
Control Strategy: Manually remove with tweezers; caterpillar hairs in cocoon may irritate skin (wear gloves). Outbreaks are rare; trees may tolerate one season of defoliation; insecticides are impractical under most conditions.
More pictures of Tussock Moth |
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Item Name: Tent caterpillar
Date: 9/18/01
City/Area: Yavapai County, AZ
Description of Conditions: Native insect that feeds on buds and leaves of deciduous and fruit trees (this one on Liquid Amber).
Control Strategy: Hand remove or use high pressure hose; primarily a nuisance and will not kill tree.
More caterpillars |
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Item Name: Termite Frass, Dry Wood
Date: 9/19/01
City/Area: Prescott, AZ
Description of Conditions: This material was found in a void within a piece of wood inside a house.
Control Strategy: Exterminator. |
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Item Name: Thrips
Date: 4/7/05
City/Area: Prescott, AZ
Description of Conditions: Tend to feed on buds, within furled leaves, & other unexposed areas of plants.
Control Strategy: Prune and destroy infested material; insecticidal soap provides temporary reduction when thrips first appear; dormant oil helps control over- wintering thrips; systemic insecticide (on non-edible plants only) may be required during growing season. Avoid insecticidal sprays, as they kill natural predators. |
