Insect Management Handbook

Includes Parthenolecanium corni

Icerya purchasi

Cacoecimorpha pronubana

Azalea lace bug (Stephanitis pyrioides)
Rhododendron lace bug (Stephanitis rhododendri)

Acanthococcus (Eriococcus) azaleae

Pest description and damage The immature scales superficially resemble mealybugs in appearance. Mature female scales are about 0.125 inch in length and appear like white cottony sacs, often located on twigs and stems of azalea, especially in branch axils. Eggs, crawlers, and female scales under the white cotton are red.

Includes Illinoia rhododendri and others

Enarmonia formosana

Frankliniella spp.

Gracillaria syringella

Pest description and damage The adult insect is a golden yellow moth about 0.5 inch in length. The larvae are small, pale yellow to green caterpillars, 0.125 to 0.25 inch long. The larvae mine leaves causing brown wrinkling on leaf surfaces during the early part of their development. Later larval instars are responsible for rolling and skeletonizing leaves.

For biology, life history, monitoring and management

Leucoma salicis

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