• Pearleaf blister mite

    The adults are very small and cannot be seen without a 15X hand lens; the body is white and elongate oval in shape, like a tiny sausage.

  • Forest tent caterpillar

    Adults are reddish brown with two brown, transverse-parallel bands. Masses of shiny black eggs are laid in a ring around twigs. Larvae have long silky hairs on their body and a row of elongated spots along the back.

  • 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.

  • European fruit lecanium (Brown apricot scale)

    The adult female scale is nearly hemispherical and shiny brown, with several ridges along the back. Nymphs are light colored.

  • Apple red bug

    Adult has head and thorax bright red in color with brown wings.

  • Mineola moth (Destructive pruneworm)

    Adult is a bluish gray moth that assumes a wedge shape when at rest. It has a transverse broad white stripe bordered by a smaller reddish brown stripe in the middle of the forewings a smaller set of similar bands occur near the posterior edge.

  • Alternaria blotch

    The disease primarily affects the foliage, causing circular, necrotic lesions with a light brown interior that later become surrounded by a darker purplish halo.

  • Lady beetles

    Adults are oval and convex in shape, often brightly colored (e.g., orange-red or yellow) and usually with black spots or marks on their wing covers, sometimes with a checkerboard appearance.

  • Hawthorn dark bug

    The young adult is black with red wing markings, which disappear a few days after it metamorphoses into an adult.

  • Mucor Rot

    Infected tissue appears light brown, soft, and watery. The infection usually develops at wound sites, at the calyx end, or at the stem end of the fruit.

  • Redbanded leafroller

    The adult's forewings are grayish brown with a subtle dark red and brown oblique band. The larva is pale green with a yellow or green head.

  • Tarnished plant bug

    The adult is brown and the extremities of its wings are translucent with a cream-colored scutellum on its back. The nymph is pale green; from the 3rd nymphal stage, it has five black points on the back.

  • Western flower thrips and flower thrips

    Western flower thrips and Flower thrips are indistinguishable without a microscope. Adults are slender and yellowish, with short antennae; the wings are long and narrow, and held over the abdomen.

  • Brooks fruit spot

    Appears as irregular, slightly sunken dark green lesions on immature fruit.

  • Comstock mealybug

    Adult females and nymphs are generally similar in appearance, having an elongate-oval shape, no wings, a many-segmented body and well-developed legs.

  • Assassin bugs

    The head is narrow and elongate with the portion behind the eyes neck-like. Sometimes a sculptured crest may be found on the pronotum. The front legs are specialized for hunting.

  • Armillaria root rot

    The bark at the crown and roots sloughs off easily, exposing the dense white growth of the fungus. The growth extends in a fan-like pattern underneath the bark. Black shoestring-like strands may be obvious on the surface of the bark.

  • White apple leafhopper

    Adults are creamy white with short antennae, translucent wings, and a long wedge-shaped body. Usually found on the underside of leaves, they jump and fly with great agility. Nymphs are yellowish, wingless and very mobile; they generally move in a back-and-forth motion.

  • Rosy apple aphid

    Populations arise from the overwintered stem mothers, which are wingless and purplish in color, and form into colonies of rosy-purple nymphs with dark cornicles.

  • Apple leaf (curling) midge

    The adult is a tiny dark brown fly, and the larva is a yellow-white maggot with a reddish tinge.