摘要
对采日我国北纬２２～４３度，６个不同寄主的１１个松毛虫赤眼蜂种群，进行了寄主选择和适应力方面的比较研究。结果表明，对于参试的６种寄主卵所组成的３个不同寄主组合，种群间在对不同寄主的嗜好程度和适应力两方面部未存在显著差异。当米蛾卵与玉米螟卵同时存在时，各种群都明显喜好米蛾卵而很少与玉米螟卵接触，也很少寄生玉米螟卵。
omparative observations of host species selection and host suitability were
carried out inthe laboratory among 11 populations of Trichogramma dendrortmi.The different T.
dendrolimipopulations were originated from five Dendrolimus [Lep.:Lasiocampidae]species
and the Asiancorn borer,Ostrinia furnacalis [Lep.:Pyralidae],located from 22°N to 43°N in
China.Eggs ofsix host specics,coming from 3 different families,were arranged into 3 host
combinations andexposed to female wasps of various populations.No significant
differences,either in hostselection or kost suitability,was detected among the 11 populations on
all the 3 hostcombinations tested.The results also showed that the populations preferred eggs
of the ricemoth,Corcyra cephalonica,to those of the Asian corn borer,although one of the
populationstested was originated from O. furnacalis.Factors influencing the evolution of
intraspecificvariations in host selection and adaptation were briefly discussed.
基金
国际科学基金
关键词
松毛虫赤眼蜂
种内变异
寄主
选择
Trichogramma dendrolimi intraspecific variation host selection host suitability Ostrinia
furnacalis Dendrolimus spp.Corcyra cephalonica
