Effects of egg-surface chemicals on the oviposition behaviors of Bactrocera dorsalis Hendel
Several tephritid species can release host marking pheromones following egg-laying to inform other females of the same species or the similar species that the oviposition resource has already been occupied.The objective of this study is to explore egg-surface chemicals of Bactrocera dorsalis Hendel as a potential source of host marking pheromones,hence to provide new approaches for the control of insect pests.The oviposition repellent activity and behavior interference of methanol extract from the egg surface of B.dorsalis against adults of the same species were measured to evaluate the host marking effect of the egg-surface chemicals.Results showed that the methanol egg-surface extract had positive repellent activity against the oviposition of B.dorsalis.In selective condition,at concentration of 100 mg/mL,oviposition repellent rate was 55.45 ％ ; while in non-selective condition,the oviposition repellent rate reached 64.79％.On banana fruit treated with the methanol egg-surface extract,the visiting frequency,attempt oviposition time,attempt ovipositiou frequency,and the actual oviposition frequency and egg number were significantly lower than those on the control treatment.It indicated that host marking pheromone chemicals occurred on the egg-surface of B.dorsalis.
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万方数据
维普
