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How to Manage Pests

UC Pest Management Guidelines


Fig scale.

Fig

Fig Scale

Scientific Name: Lepidosaphes conchiformis

(Reviewed 7/06, updated 1/09)

In this Guideline:


DESCRIPTION OF THE PEST

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

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.

MANAGEMENT

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.

Common name Amount to Use R.E.I.+ P.H.I.+
(trade name)   (hours) (days)

  Calculate impact of pesticide on air quality
When choosing a pesticide, consider information relating to impact on natural enemies and honey bees and environmental impact. Not all registered pesticides are listed. Always read label of product being used.
 
DORMANT
A. NARROW RANGE OIL#
  (Omni Supreme Spray) 3 gal/acre or 4 0
    2 gal/100 gal water    
  MODE OF ACTION: Contact including smothering and barrier effect.
 
+ Restricted entry interval (R.E.I.) is the number of hours (unless otherwise noted) from treatment until the treated area can be safely entered without protective clothing. Preharvest interval (P.H.I.) is the number of days from treatment to harvest. In some cases the REI exceeds the PHI. The longer of two intervals is the minimum time that must elapse before harvest.
# Acceptable for use on organically grown produce.

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Fig
UC ANR Publication 3447
Insects and Mites
R. L. Coviello, UC UC Cooperative Extension, Fresno County
W. J. Bentley, UC IPM Program, Kearney Agricultural Center, Parlier

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