DEVELOPMENT AND PREDATION OF Ischiodon spp. AS NATURAL ENEMY OF COWPEA APHID Aphis craccivora KOCH.

By: Herminanto
Agrotechnology Study Program Faculty of Agriculture Jenderal Soedirman University
PO Box 125 Purwokerto 53101; Telp/fax: 0281 638791;
E-mail: Hermin06@gmail.com

ABSTRACT
A research has been conducted to study development and predation of a syrphid fly Ischiodon spp. on cowpea aphid Aphis craccivora Koch. It used a randomized complete .block design. Treatments contained six prey populations. i.e.: 20, 40, 60, 80, 100, and 120 aphids. Each was replicated four times. Results performed that various aphid population densities did not influence the predatory life span. However, the body sizes varied at different treatments. Greater number of aphids as the prey tended to increase amount of consumed preys by the predator, ranging from 15.5 – 67.75 aphids per predator. The highest predation reached 80% on 40 aphid population.
Key words:Ischiodon spp, Aphis craccivora, development, and predation.
(full text is available on request)