How to Manage Pests

Pests in Gardens and Landscapes

Katydids—Scudderia furcata and Microcentum retinerve

Identification

Katydids resemble grasshoppers but have long antennae. The nymphs are wingless and have black and white banded antennae.

Life cycle

Female katydids lay their gray, oval 1/8- to 1/4-inch long eggs in two overlapping rows on twigs and leaves or into the edges of their chewing damage. Nymphs appear in April and May and require 2 to 3 months to mature. Katydids produce one generation a year.

Damage

Katydids may feed on leaves or fruit. Katydids do not eat the whole fruit. They often take a bite and move on, allowing the feeding site to become covered with grayish scar tissue and the expanding fruit to become misshapen. Most damage is done by nymphs.

Solutions

In areas where there is good biological control, parasites often attack the eggs of katydids. Control is not usually necessary, but spinosad can be applied if nymphs are numerous when fruit are small.

Katydid adult
Katydid adult

Katydid nymph
Katydid nymph

Katydid damage to citrus fruit
Katydid damage to citrus fruit

Katydid damage to young fruit
Katydid damage to young fruit


Statewide IPM Program, Agriculture and Natural Resources, University of California
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