孪斑唇瓢虫幼虫对桑白盾蚧捕食功能反应的研究  

Study on Response of Larvae of Chilocorus geminus Zaslavskij to Predacious Function of Pseudaulacaspis pentagona(Targioni)

作　　者：魏治钢[1] 赵莉[1] 杨森[2] 

机构地区：[1]新疆农业大学农学院,乌鲁木齐830052 [2]新疆农业科学院植保所,乌鲁木齐830091

出　　处：《新疆农业大学学报》2009年第2期49-53,共5页Journal of Xinjiang Agricultural University

基　　金：新疆维吾尔自治区科技厅重点攻关项目(200631102)

摘　　要：在实验室自然温度下，研究了孪斑唇瓢虫1-4龄幼虫对桑白盾蚧若虫的捕食功能反应。试验结果表明，应用Holling-Ⅱ型方程拟合各龄幼虫的H最大捕食量：1龄、2龄、3龄和4龄幼虫分别为：597.4，106.9，176.5，214.6头／a；应用Holling-Ⅲ型方程拟合各龄幼虫的最佳寻找密度：1龄、2龄、3龄和4龄幼虫分别为：53.0，36.8，36.9，37.7头／d。表明孪斑唇瓢虫幼虫对桑白盾蚧若虫捕食潜力很大，尤其是3龄和4龄幼虫对桑白盾蚧若虫具有较大的捕食潜能，且各龄幼虫的寻找效应均随着猎物密度的增加而降低。Response of 1 to 4 instar larvae of Chilocorus geminus Zaslavskij to nymphs Pseudaulacaspis pentagona （Targion） were studied in the laboratory under natural temperature. The maximum pest a-mount predated by different instar larvae of ladybird per day were calculated with Holling- Ⅱ formula. The insects predated 1,2,3 and 4-instar larvae per day were 597.4,106.9,176.5 and 214.6 respectively. The best seeking density by different instar larvae of ladybird per day were calculated with Holling-Ⅲ formula. The result demonstrated 1-,2-, 3-and 4- instar larvae were about 53.0,36.8,36.9 and 37.7 respectively. The experiment results showed Chilocorus geminus Zaslavskij catches a lot of Pseudaulacaspis pentagona （Targion） per day,especially the 3rd-instar and 4th-instar larvae catch greater number of Pseudaulacaspis pentagona （Targion）. The searching efficiency decreases with increase of predator density.

关 键 词：孪斑唇瓢虫 桑白盾蚧 捕食功能 寻找效应 

分 类 号：S476[农业科学—农业昆虫与害虫防治]