【摘要】 【目的】评价新纪录种安德森钝绥螨(Amblyseius andersoni)对不同猎物的捕食偏好性。【方法】采用捕食量与捕食偏好性试验,并结合Cain评价指数分析安德森钝绥螨雌成螨对烟粉虱(Bemisia tabaci)、截形叶螨(Tetranychus truncatus)不同虫态的捕食偏好性。【结果】捕食量试验表明,安德森钝绥螨对烟粉虱1龄若虫的日均捕食量和总捕食量最高,分别为(7.19±0.59)头、(113.29±7.95)头;对截形叶螨幼螨的日均捕食量和总捕食量最高,分别为(12.00±2.18)头、(186.71±7.18)头。捕食偏好性试验表明,安德森钝绥螨对烟粉虱1龄若虫的捕食量为(7.90±1.22)头、对卵的捕食量为(2.50±0.59)粒,Cain指数D=3.16>1;安德森钝绥螨对截形叶螨幼螨的捕食量为(17.35±1.80)头、对卵的捕食量为(15.60±2.99)粒,Cain指数D=1.11>1;安德森钝绥螨对烟粉虱1龄若虫的捕食量小于对截形叶螨幼螨的捕食量,Cain指数D=0.51<1。【结论】相对于烟粉虱,安德森钝绥螨雌成螨的捕食更偏好于截形叶螨,且对截形叶螨的捕食更偏好于幼螨。更多还原

【Abstract】 【Objective】To evaluate the predation preference of Amblyseius andersoni(A. andersoni),a new recorded species,to different prey. 【Methods】The predation preference of female adults of A. andersoni to different states of Bemisia tabaci(B. tabaci)and Tetranychus truncatus(T. truncatus)was analyzed by means of predation quantity and predation preference test combined with Cain evaluation index. 【Results】In the predation quantity test,for B. tabaci,the highest average daily predation and total predation of A. andersoni was observed in 1 stinstar nymph,which were 7.19 ±0.59 and 113.29 ±7.95,respectively;for T. truncatus,the highest average daily predation and total predation of A. andersoni was observed in larvae,which were 12.00±2.18 and 186.71±7.18,respectively. In the predation preference test,the predation quantity of A. andersoni against 1 stinstar nymph of B. tabaci was 7.90 ±1.22,the predation quantity of A. andersoni against egg of B. tabaci was2.50 ±0.59,and the Cain index(D)was 3.16 >1;the predation quantity of A. andersoni against larvae of T. truncatus was17.35±1.80,and the predation quantity of A. andersoni against egg of T. truncatus was 15.60±2.99,and the Cain index(D)was 1.11>1;the predation quantity of A. andersoni against 1 stinstar nymph of B. tabaci was lower in comparison with larvae of T. truncatus,and the Cain index(D)was 0.51 <1. 【Conclusion】Compared with B. tabaci, A. andersoni showed higher predation preference to T. truncatus,especially for larvae of T. truncatus.更多还原