Insect Management Handbook

California pear sawfly (Pristiphora abbreviata)
Pear slug (Caliroa cerasi)

Pristiphora geniculata

Enarmonia formosana

Choreutis pariana

Includes Green apple aphid (Aphis pomi) and others

Frankliniella occidentalis

Description, biology and damage Adults are yellow to yellow-brown, 0.05 inch in length, narrow, with wings. Larvae are smaller and wingless. Both stages feed on developing growth causing leaf distortion and black necrotic tissue. Most damage to maple occurs when thrips disperse from grass and hay fields as they are mowed or harvested in the summer.

For biology, life history, monitoring and management

Boisea rubrolineata

Leucoma salicis

Pest description and damage The adult moth (over 1-inch wingspan) is satiny white with black markings on the legs. The attractive larvae are approximately 2 inches long when grown and reddish brown with double white dorsal patches and tufts of hairs along the sides. They can seriously skeletonize then defoliate cottonwood, poplar, and willow. They occasionally attack oak and aspen. Lombardy poplar and silver maple are particularly susceptible.

Includes Edwardsiana rosae

Lepidosaphes ulmi