Insect Management Handbook

Numerous species

Pest description and damage Identification is important as each species differs in susceptibility to pesticides. Adult weevils are dark colored, nocturnal beetles from 0.2 to 0.25 inch in length, with a snout (rostrum) and elbowed antennae. Look for ragged notches on the edges of leaves, or flower petals. Larvae are C-shaped, legless, and white, sometimes reddish, with tan heads, up to 0.5 inch in size.

For biology, life history, monitoring and management

Numerous species

Pest description and damage Identification is important as the numerous species differ in susceptibility to pesticides. Adult weevils are dark colored, nocturnal beetles from 0.2 to 0.25 inch in length, with a snout (rostrum) and elbowed antennae. Look for ragged notches on the edges of leaves, or flower petals. Larvae are C-shaped, legless, and white, sometimes reddish, with tan heads, up to 0.5 inch in size.

For biology, life history, monitoring and management

Tischeria ceanothi

Pest description and damage Tiny (around 0.2 inch in length) drab grayish moths may be seen flying in clouds around plants. They lay eggs on leaves. The tiny leafminer caterpillar eats into the leaves and feeds between the upper and lower leaf surfaces. Damage can be rather inconspicuous when damage is light. Occasionally all the leaves turn brown, and the plant appears to have died; however, new leaves will eventually emerge.

Lepidosaphes ulmi

Hyphantria cunea

Many species, including
Carpenter ant (Camponotus spp.)
Moisture ant/cornfield ant (Lasius spp.)
Odorous house ant (Tapinoma sessile)

Pavement ant (Tetramorium immigrans)
Velvety tree ant (Liometopum spp.)
Thatching ant (Formica obscuripes)
Yellow ant (Acanthomyops spp.)

Order Psocodea (formerly Psocoptera)

Pest description and damage Booklice (Psocids) are brownish yellow insects about the size of a pinhead. They prefer moist, undisturbed conditions.

Management

Eliminate entry points with caulk. Reduce moisture and increase light and air circulation. Fans and dehumidifiers are recommended. Apply labelled pesticides to cracks and crevices where appropriate.

For further information:

Bruchus rufimanus

Pest description and damage Adult beetle is about 0.125 inch in length, dull, and grayish brown. Larval stage feeds in and destroys dry beans. Often first evidence of infestation is the appearance of exit holes in the stored beans. These weevils will not infest grains, cereals, or other stored products.

Management

Ctenicera spp. and Limonius spp.