七星瓢虫对百合桃蚜的捕食功能反应

The predation response of Coccinella septemp unctata L. to Myzus persicae Sulz. in lily

研究了七星瓢虫幼虫及成虫对百合桃蚜的捕食功能反应。结果表明 ,其功能反应均属 Holling 型 ,各龄幼虫及成虫捕食功能反应模型为 :Na1 =0 .82 5 764Nt/ ( 1 +0 .0 1 45 3 9Nt) ,Na2 =1 .0 62 5 73 Nt/ ( 1 +0 .0 1 3 0 2 9Nt) ,Na3=0 .989489Nt/ ( 1 +0 .0 0 2 2 42 N t) ,Na4 =1 .0 2 0 3 85 Nt/ ( 1 +0 .0 0 1 44 2 Nt) ,Na5=1 .0 5 493 7Nt/ ( 1 +0 .0 0 1 0 3 3 Nt) ,日最大捕食量依次为 5 6.8头、81 .6头、441 .3头、70 7.7头和 1 0 2 1 .5头。

The predation response of larva and adult Coccinella septemp unctata L.to Myzus persicae Sulz. was studied. It showed that the functional response belonged to HollingⅡ.Its functional model was as follows:1st instar larva: N a 1 =0.825 764N t /(1+0.014 539N t ), 2st instar larva: N a 2 =1.062 573N t /(1+0.013 029N t ), 3st instar larva: N a 3 =0.989 489N t /(1+0.002 242N t ),4st instar larva: N a 4 =1.020 385N t /(1+0.001 442N t )and adult: N a 5 =1.054 937N t /(1+0.001 033N t ).The most consuming rate by Coccinella septemp unctata L.to Myzus persicae per day was 56.8,81.6,441.3,707.7 and 1 021.5.