Insect Management Handbook

Pentamerismus taxi

Pest description and crop damage Deep red, small, short-leg mite, generally flattened. This mite generally is found on yew but also on other evergreens.

Management-biological control

Spider mites have many natural enemies, including other mites.

Management-chemical control

See:

Otiorhynchus spp.

See:

Common Pests of Nursery Crops

Lecanium spp.

See:

Common Pests of Nursery Crops

Pulvinaria floccifera

See:

Common Pests of Nursery Crops

Nymphalis antiopa

Pest description and crop damage Adult is a large butterfly, with purplish brown wings bordered with a wide yellow stripe inside of which is a row of blue or purple spots. Larvae are purplish black with a row of orange or red spots along the back. They have brownish prolegs and are clothed with long, forked spines.

Management-chemical control

See:

Leucoma salicis

Pest description and crop damage Adult moth is satiny white. Larvae are approximately 2 inches long when grown, reddish brown, with white patches on top and tufts of hairs along sides. They can seriously defoliate trees such as cottonwood, poplar, and willow. They occasionally attack oak and aspen.

Management-chemical control

See:

Cryptorhynchus lapathi

See:

Poplar (Populus)-Poplar-and-willow borer

Lachnus salignis and other species

See:

Common Pests of Nursery Crops

Prionoxystus robinae

Pest description and crop damage Large white grub (1 to 3 inches), bores holes 0.5 inch in diameter in trunk and main branches, and eventually kills trees. Adult moth, which is speckled gray, causes no damage. Three-year life cycle.

Management-cultural control

Keep trees vigorous.

Management-chemical control

See:

Otiorhynchus spp.

See:

Common Pests of Nursery Crops