Flea Beetle (Coleoptera: Chrysomelidae) Response, Feeding, and Longevity on Oilseed Rape and Crambe
作者:
Chengwang Peng,
Michael J. Weiss,
Marc D. Anderson,
期刊:
Environmental Entomology
(OUP Available online 1992)
卷期:
Volume 21,
issue 3
页码: 604-609
ISSN:0046-225X
年代: 1992
DOI:10.1093/ee/21.3.604
出版商: Oxford University Press
关键词: Insecta;Phyllotreta cruciferae;feeding;longevity
数据来源: OUP
摘要:
Cage environments in the laboratory were used to study flea beetle,Phyllotreta cruciferae(Goeze), feeding, response, and longevity on oilseed rape (Brassica napusL.) and crambe (Crambe abyssinicaHochst.). Flea beetle feeding occurred almost exclusively in the light. Flea beetles fed significantly more on oilseed rape than on crambe in choice and no-choice tests. Residence time on oilseed rape also was longer. In choice tests, there was no difference in transition frequency between oilseed rape and crambe. In no-choice tests, Significantly higher transition frequency was observed on crambe. Mechanical wounding of the cotyledons of the two plant species did not influence flea beetle response or feeding. The effect of flea beetle density on the amount of feeding was described with a second-order polynomial regression, which suggests that the beetles need to aggregate in sufficient numbers to utilize a host optimally. In the long-term feeding studies, the amount of feeding per beetle differed significantly between oilseed rape and crambe during the initial 25 d, after which there were no significant differences. Flea beetles that fed on oilseed rape lived significantly longer than those that fed on crambe. There was no difference in longevity between males and females fed on the same plant materials. The results confirm that crambe is a less-suitable host for flea beetles than is oilseed rape.
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