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INSECT AND MITE PESTSTarnished Plant Bug  Tarnished Plant Bug Adult TPB are mottled brown insects with wings folded over its abdomen. Adults are difficult to find in apples and will fly when disturbed. Nymphs are small and greenish and resemble the adult without wings. Eggs are flask shaped and laid in the plant tissue such that only the narrow end protrudes. Adult TPB overwinters under bark, in leaf litter, and other such protected places. Early in the spring, TPB feed on developing fruit buds, and later on, developing fruit. Their feeding with piercing-sucking mouthparts early in the spring results in catfaced fruit at harvest. SCOUT: Hold a beat cloth under a scaffold and strike the scaffold sharply once or twice with the mallet. Sample five scaffold limbs per tree. Examine 100 fruit clusters for tarnished plant bugs. RECORD: Number of nymphs and adults per 100 fruit clusters. If sampling with a beat cloth, record the numbers of nymphs and adults per tree and mark this entry on the scout form with a "BC". ACTION THRESHOLD: Five nymphs or adults per 100 fruit clusters. |
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