How to Manage Pests
UC Pest Management Guidelines
Overwintering adults are dark brown with a greasy-appearing wax coating; summer broods and younger scales are lighter in color. Overwintering females are found on 1- to 2-year-old wood. Eggs are laid in spring, and crawlers hatch when leaves are unfolding. First generation scales settle on leaves, but later generations settle on leaves, twigs, or fruit. Adult female scales are oystershell shaped and about 0.1 inch long. There are usually three generations with occasionally a partial fourth.
Damage is caused when scales settle on fruit. Their feeding causes a kind of callous tissue to form on the skin, which gives the fruit a warty appearance. It is particularly noticeable if the fruit is canned or candied.
A wasp parasite (Aphytis sp.), imported in 1949 from France, generally gives excellent control of the fig scale. If the scale parasite has been disrupted for some reason, chemical control may be necessary. Treatments applied during the dormant season will adequately control the scale in most cases and have the least disruptive effect on the parasites.
UC IPM Pest Management Guidelines: Fig