College of Agriculture & Natural Resources

• 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.

• Cigar casebearer

  Adult is dark gray with fringed wings. The small yellowish larva of the cigar casebearer has a black head and builds and hides in a cigar-shaped shelter that it carries with it while feeding or attaches to leaves and branches of apple trees.

• Nectria canker

  Cankers are often associated with nodes, often appearing as elliptical sunken areas. Sometimes callus production stops fungal invasion and cankers die by season's end.

• Apple (Lyonetia) leafminer

  The adult has narrow white forewings with extensive gray-black and brown markings apically wing margins are fringed with long hairs. The larva is whitish and generally concealed within the leaf mine.

• Prionus borers

  Adults are robust, broad, somewhat flattened blackish to reddish brown beetles with antennae roughly half the length of their bodies.

• 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 apple sawfly

  The adult looks similar to a small, orange-brown wasp with the ventral side and legs orange in color. It has transparent wings with many veins. The egg, oval and translucent, is inserted into the receptacle of the flower.

• 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.

• 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.

• 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.

• 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.

• Phytoseiid mites

  A dark mark in the form of an "H" sometimes appears within their body. This mark is red when they feed on European red mites and yellow when they feed on twospotted spider mites. They move very rapidly on the leaves.

• 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.

• Shothole borer

  The adult is stocky with a hard black body and antennae, leg segments and tips of elytra reddish brown; its head is not visible from above.

• Apple union necrosis and decline

  AUND is due to an incompatibility at the graft union where a resistant scion is grafted onto a susceptible, but tolerant rootstock, most commonly MM.106.

• Humped green fruitworm

  Adult's forewings are gray and marked with light and dark areas for 2/3 of their length the outer 1/3 is a lighter gray.

• Spiders: Foliage Hunters

  The body of a spider is divided into two regions, the cephalothorax and abdomen. The cephalothorax bears the eyes (various numbers and arrangements), mouthparts, pedipalps and legs (four pairs), and the unsegmented abdomen bears the genital structures, spiracles, anus and spinnerets (silk-spinning structures).

• Cherry fruitworm

  The adult is a small, brownish gray moth with a median gray band on the forewings and a dark spot at the base of the hind wings. Although whitish gray with a black head when young, the larva eventually becomes pink tinted, with a brownish tan head.

• 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.