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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 26, No. 6, 2005, pp. 603-608
Bioline Code: zr05058
Full paper language: Chinese
Document type: Research Article
Document available free of charge

Zoological Research, Vol. 26, No. 6, 2005, pp. 603-608

 en Effects of Three Plant Powders on Behaviour, Mortality and Reproductive Fitness of Callosobruchus maculatus check for this species in other resources (Fabricius) (Coleoptera: Bruchidae)
T. I. OFUYA, J. M. OSADAHUN

Abstract

The effects of powders from dry flower buds of Eugenia aromatica check for this species in other resources Baill., seeds of Piper guineense check for this species in other resources Schum and Thonn and fruits of Capsicum frutescens check for this species in other resources L. on adult behaviour, mortality and reproductive fitness of the cowpea seed beetle, Callosobruchus maculatus check for this species in other resources (Fab.) were investigated under ambient laboratory conditions. All experiments were carried out in glass Petri plates. All powders elicited aversion in adult beetles. The contact toxicity symptoms included restlessness, loss of coordination, knock down and eventual death of adult beetles. These behaviours were more pronounced with E. aromatica in which adult beetles died within 16 hours. P. guineense and C. frutescens powders did not cause 100% mortality of adult beetles, even after 24 hours. Each of the three powders significantly (P<0.05) reduced the mating competition of adult males after sub-lethal exposure for one, two, and three hours, respectively. E. aromatica powder caused more reduction in male mating competition for females than any of the other two powders after each period of exposure. Receptiveness of treated females to courting males was also decreased by exposure to any of the three powders. Similarly, E. aromatica powder caused greater decreases in female receptiveness to males than any of the other two powders after each period of exposure. Exposure of either adult male or female C. maculatus to the powders for sub-lethal times of three, six and nine hours significantly reduced the fecundity of the beetles. E. aromatica powder caused the most reduction of eggs laid and also significantly reduced fertility of the eggs.

Keywords
Callosobruchus maculatus, Plant powder, Behaviour, Mortality, Reproductive fitness

 
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Alternative site location: http://www.zoores.ac.cn/

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