《环境昆虫学报》

多种实蝇科害虫产卵后可释放寄主标记信息素来表明寄主果实已经被占据，从而调节自身或同种个体间的对寄主果实的产卵选择行为。为探明桔小实蝇卵表化合物的寄主标记作用，本文测定了桔小实蝇卵表甲醇提取物对桔小实蝇的产卵驱避活性，并观察了甲醇提取物处理对桔小实蝇产卵行为过程的影响。结果表明：桔小实蝇卵表甲醇提取物对桔小实蝇有明显的产卵驱避活性，且活性随浓度的增加而增强，当提取物浓度为100 mg/mL（虫卵与溶剂质量体积比，m/v）时，在选择性条件下的产卵驱避率为55-45%；非选择性条件下的产卵驱避率达到64%-79%。经卵表提取物处理后，桔小实蝇在寄主果实上的访问次数、试探产卵时间、试探产卵次数、实际产卵次数和产卵量均显著少于对照。证实了桔小实蝇卵表化合物具有明显的产卵寄主标记作用。

英文摘要:

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 oviposition 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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