Feed consumption of the predatory earwig (Euborellia annulata Fabr.) reared on cotton aphid (Aphis gossypii Glover) and cotton leafhopper (Amrasca biguttula biguttula Ishida)

Issue Date

10-2004

Abstract

The adult earwig consumed more aphids and leafhopper than the nymphs at 4th or 3rd instar. In the laboratory, it consumed a mean of 32.12 ± 1.09 leafhoppers; 31.36 ± 1.06 aphid nymphs and 31.29 ± 1.06 aphid adults. In the greenhouse, it consumed 26.05 ± 0.88 leafhoppers; 26.29 ± 0.89 aphid nymphs and 22.99 ± 0.78 adults. The adult earwig preyed on cotton aphid and cotton leafhopper at all developmental stages but the 4th instar predatory nymph preferred nymphs over adult preys. The least predation was exhibited by nymphs at 3rd instar. The functional response curve of earwig fitted the type II model of predation of Holling. It rapidly consumed all when given 20 or 30 preys, but with 40 or 50 preys, consumption levelled off within 24 hours, probably upon reaching the satiation point. Functional response showed dependence on length of time the prey is exposed, the prey density and the developmental stage of the prey.

Source or Periodical Title

Philippine Entomologist

ISSN

0048-3753

Volume

18

Issue

2

Page

175

Document Type

Article

Frequency

semi-annually

Language

English

En – AGROVOC descriptors

AMRASCA BIGUTTULA; APHIS GOSSYPII; DERMAPTERA; PREDATORY INSECTS; PREDATORS; PREDATION; FEED CONSUMPTION

This document is currently not available here.

Share

COinS