A biological study on Exorista civilis, a tachinid parasitoid of Loxostege sticticalis

doi:10.11686/cyxb20130312

Abstract

Abstract: The tachinid fly Exorista civilis (Diptera: Tachinidae) is an important parasitoid of the beet webworm, Loxostege sticticalis (Lepidoptera: Pyralidae) and other lepidopterous pests. The adult biology of the parasitoid was observed in the laboratory. The adults emerged mainly in daytime at 08:00-10:00 and 14:00-16:00, and males usually emerged earlier than females. The sex ratio of E. civilis was 1.26∶1 (♀/♂). The average number of eggs laid by one female was 159.8, and the ovipositional period lasted 16.6 days on average, with a peak on the fourth day of egg-laying. The greatest longevity of adults was in an illuminated incubator with a constant temperature of (23±1)℃. Abundant sugary media significantly prolonged adult longevity, especially when 20% honey solution was provided - they could then survive for 44 days. The emergence ratio significantly decreased with an increase in storage time of the parasitoid L. sticticalis, but there was no further significant decrease after 110 d.

CLC Number:

XIANG Hong-yan, LIU Ai-ping, GAO Shu-jing, XU Lin-bo, LIU Chang-zhong. A biological study on Exorista civilis, a tachinid parasitoid of Loxostege sticticalis[J]. Acta Prataculturae Sinica, 2013, 22(3): 92-.

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