Effect of aphid feeding reduction on oviposition characteristics of Coccinella septempunctata
In order to clarify the effects of aphid reduced feeding on the egg laying characteristics of the adult Coccinella septempuncta-ta under high density conditions,five aphid reduced treatments of 0,25%,50%,75%and 100%were designed in the experiment,which were A(pure aphids),B(3-day aphids and 1-day artificial feed),C(1-day aphids and 1-day artificial feed),D(1-day aphids and 3-day artificial feed),and E(pure artificial feed),respectively.The effects of reduced feeding of aphids on egg produc-tion,oviposition location selection,hatching rate and life span of the adult ladybird were analyzed.The results showed that the egg-laying capacity of Coccinella septempunctata in A,B,C,D and E treatments decreased with the decrease of feeding capacity of aphids.There was no significant difference between 25%aphid reduction in treatment B and pure aphid in treatment A.Most of the eggs laid by each treatment of Coccinella septempunctata were collected eggs,and the available utilization rate of eggs was high.Except for the pure feed in treatment E,each aphid reduction treatment had no significant effects on the oviposition location selection,hatch-ing rate and life span of the ladybird.To sum up,treatment B,25%soybean aphid reduction combined with artificial feed,showed no significant difference in all indicators of high density Coccinella septempunctata compared with treatment A,the pure aphid control,which could be applied to the efficient breeding of Coccinella septempunctata.
aphidCoccinella septempunctatafeeding reductionartificial feedoviposition characteristicsbiological control
彭应力、余佳敏、王勇、刘东阳、刘挺、江连强、龙岗、李斌、谢云波、伍兴隆、郭仕平、蔡鹏、蒲德强
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四川省农业科学院植物保护研究所,成都 610066
中国烟草总公司四川省公司,成都 610041
四川省烟草公司凉山州公司,四川 西昌 615000
四川省农业科学院园艺研究所/蔬菜种质与品种创新四川省重点实验室,成都 610066
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蚜虫 七星瓢虫(Coccinella septempunctata L.) 减量饲喂 人工饲料 产卵特性 生物防治
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