Common Name

Caterpillars

Phylum

Lepidoptera

Physical Description

Larvae of moths and butterflies, have similar structures. Head well developed, with pair of strong mandibles, used to chew plant tissues. Thorax three segmented, with pair of jointed legs on each segment. Abdomen has ten segments with 5 pairs of fleshy non jointed legs. Size 5 - 100 mm Colour varies.

Distribution, Habitat

50 species found in garden and greenhouse plants.

Life Cycle

Reproduction sexual. 100 eggs laid near or on host plant, in batches. Hatch in a few weeks, and feed for 1 to 2 months. They then pupate on plants, soil and debris. Adults emerge in a few weeks.

Method Of Attack

Caterpillars feed on all parts of plant, large chunks taken from leaves, silk often seen.

Cultural Control

Pick off and crush. Overwintering prevented by good hygiene, or correct pruning.

Chemical Control

In large infestations contact insecticide is used as dust or spray. Derris, Biosmethrin, Resmethrin, Malathion.

Biological Control

Microbial insecticide Bacillus thuringiensis. Chemicals must not be used here.