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异色瓢虫Harmonia axyridis(Pallas)的法国种群具有飞行能力较低的特点,在生物防治方面可能更具利用价值。为了使其更好的在田间应用,本文进行了异色瓢虫的法国种群各龄幼虫及雌、雄成虫对豆蚜的捕食功能比较研究。结果表明:各龄幼虫及雌、雄成虫对豆蚜捕食功能反应符合Holling II模型,检验各圆盘方程理论值和实测值拟合较好。同一虫态在不同空间水平对蚜虫的捕食能力有显著差异,在广口瓶处理中(较大空间),1～4龄幼虫及雌、雄成虫的最大理论捕食量分别为4.51、83.33、111.12、166.67、190及200头;不同虫期及成虫的瞬间攻击率a为3龄>4龄>雄虫>雌虫>2龄>1龄,且1龄的处理时间Th最长(0.2225);在培养皿处理中(较小空间),1～4龄幼虫及雌、雄成虫的最大理论捕食量分别为6.17、19.23、45.45、100、142.86、111.11头,不同虫期的瞬间攻击率a为2龄>3龄>雄虫>4龄>1龄>雌虫,且4龄的处理时间Th最长(0.1624)。
The French population of the Harmonia axyridis (Pallas) has the characteristics of low flight capacity and may be more valuable in biological control. In order to make it better applied in the field, this paper carried out a comparative study of the predation function of the larvae of the larvae and the adult male and female adults of French larvae. The results showed that the predation functional response of the larvae and male and female adults to the bean aphid accorded with the Holling II model, and the theoretical and measured values of each disc equation fitted well. The predation ability of aphids in the same insect state was significantly different at different spatial levels. The maximum theoretical predation amount of the first to fourth instar larvae and female and male adults was 4.51, 83.33, and 11.12 in the wide-mouth treatment (larger space) , 166.67, 190 and 200, respectively. The instantaneous attack rates at different stages and adults were as follows: 3rd instar> 4th instar> male> females> 2nd instar> 1th instar and the longest treatment time was the longest (0.2225) The maximum theoretical predation amount of the first to fourth instar larvae and the female and male adults were 6.17, 19.23, 45.45, 100, 142.86 and 111.11 in petri dishes (smaller space) respectively. The instantaneous attack rate a The second instar> the third instar> the male> the fourth instar> the first instar> females, and the fourth instar lasted for the longest time (0.1624).