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Silver leaf
Silvering of the foliage is the characteristic symptom. At first, silvering may be associated with only one or two major branches, but eventually the entire tree becomes silvery in appearance. When infection is severe the leaves may curl upward.
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Woolly apple aphid
The colonies of reddish brown adults and nymphs produce waxy secretions, which resemble small tufts of wool or cotton batting. The aphids are without cornicles, possessing only abdominal pores.
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Redhumped caterpillar
The adult is a grayish brown moth. The larva is yellow with a red head and is lined longitudinally with orangish, black, and white stripes.
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Hawthorn dark bug
The young adult is black with red wing markings, which disappear a few days after it metamorphoses into an adult.
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Black peach aphid
These smooth-looking, pear-shaped insects have long antennae and a pair of cornicles extending from the posterior end of the body.
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European corn borer
Adult is a pale yellowish brown moth with irregular darker bands running in wavy lines across wings male is distinctly darker than the female.
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Dock sawfly
The adult is bluish black with red legs. The larva is a smooth velvety green worm with white legs and a dark head.
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Twospotted spider mite
Adult and nymphal mites are yellowish to pale green with a dorsal pair of apparent dark "spots". Males are smaller than females and have a pointed abdomen. The female takes on an orange tinge in the fall.
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Peachtree borer
Adult is a clear-winged, metallic-blue moth that has one broad orange or two or more yellow bands across the abdomen; both sexes have more amber sheen on wings than lesser peachtree borer adults.
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Plum rust mite (Peach silver mite*)
Adult is minute and wormlike, with two pairs of legs, and pale yellow to brownish yellow in color. The nymph is pale yellowish white and closely resembles the adult.
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Variegated leafroller
Adult is grayish magenta with dark brown bands on the middle and end of the forewing. Larvae are pale green with yellowish green heads.
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Southern blight
Trees attacked by the fungus show a general decline. In the early phase of disease, a dense mat or web of white mycelium is evident at the base of the tree.
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Eyespotted bud moth
Adult forewings are bluish gray with a central cream-colored band and black spots. The chocolate brown larva has a black head and thoracic shield.
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Powdery mildew of cherry
The fungus attacks young leaves and shoots and tends to cause more damage on sour cherry than sweet cherry. Infections appear as white circular lesions or patches of powdery growth on either side of the leaf or on the terminal ends of shoots.
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Root-lesion nematode
Root-lesion nematodes are microscopic, migratory endoparasites that feed on the root systems of many crops. Affected trees appear stunted, may exhibit chlorosis or yellowing of the leaves, and have poor yields; young trees may be killed.
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Dusky stink bug
Stink bug adults have a broad, flattened, shield-shaped body and a narrow head. The dusky stink bug is dark brown, with sharp shoulder projections.
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Leaf weevils
Leaf weevils are green or brown curculios with a metallic appearance. Their antennae are borne on the snout.
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Pear thrips
Adult is slender and brown, with short antennae and a swelling behind the head; the wings are long and narrow, with fringes of long hairs.
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European brown rot
Monilinia laxa is a plant pathogen that is the causal agent of brown rot of stone fruits.
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Forbes scale
Round or elongate gray scale with a raised reddish area in the center, which distinguishes it from the San Jose scale.