Host-experience and deprivation mediate host acceptance in Callosobruchus maculatus (F.) (Coleoptera: Bruchidae)
Date Issued
2007
Date
2007
Author(s)
Hsu, Ya-Chu
DOI
zh-TW
Abstract
Callosobruchus maculatus (F.), the cowpea weevil, is an endophagous insect. It has been reported that the adult female weevils measured the quality of host beans by following a relative rule, and then either to oviposit or leave these beans. The female weevils oviposited on mung beans as well as adzuki beans in no-choice test, while they preferred adzuki bean over mung bean in choice test. To study the relationship between oviposition behaviour and host preference, three treatments (A: pure adzuki beans; M: pure mung beans; Mixed: mixed adzuki beans with mung beans) were provided to the female. We found that the female’s handling time before ovipositing on mung beans in treatment M and adzuki beans in treatment A were the same, but it is longer on mung beans in Mixed treatment than that of treatment M. Moreover, the rejection frequency on mung bean in Mixed treatment was higher than the others. The behavioural analysis of these three treatments showed that the host-experience on adzuki beans reduced ovipositon on mung beans. The result may imply that host-experience affects host discrimination in C. maculatus. Based on the results of different levels of host-experience, it was host-oviposition-experience but not host-contacting-experience to cause the reduced oviposition on mung beans subsequently. Furthermore, the effect of adzuki bean experience could remain effective based on the accumulative number of eggs within 12 hours, but disappeared in 24 hours host-acceptance-test. The adzuki bean experience even remained to be effective on host acceptance after 3 days of host-deprivation. In spite of increasing oviposition rate, host-deprivation did not totally eliminate the influence of adzuki bean experience.
Subjects
四紋豆象
寄主經驗
寄主隔離
寄主偏好
寄主接受度
Callosobruchus maculatus
host-experience
host-deprivation
host preference
host acceptance
Type
thesis
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