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2012年49 No.4
Grading criteria for assessing the ovarian development of Athetis lepigone and its use in forecasting
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Key Words： Athetis lepigone，ovarian development，grading criteria，forecast
Abstract： The structure and developmental process of the ovaries of Athetis lepigone ( Moschler ) were observed bydissecting females at different stages of development maintained in a laboratory． The results indicate that the femalereproductive system consists of paired ovaries and that each of the two ovaries consists of four polytrophic ovarioles．Ovarian development of the female reproductive system was classified into five stages，including a transparent，vitellogenesis，mature，egg-laying and late egg-laying stage． The ovarian development of A． lepigone was monitored inShijiazhuang，Hebei Provience from early July to late August of 2011． This revealed that the 1st developmental grade was more abundant than the 4rd grade throughout the entire period of occurance． These results are consistent with those
obtained from field investigations． It is therefore possible to predict the peak oviparous period of the next generation by monitoring the female reproductive system of the current generation．