粘虫(Mythimna separata Walker)选择产卵场所的意义及颜色在定位中的作用  

The significance of oviposition site selection and effect of color in orientation by oriental armyworm, Mythimna separata Walker

作　　者：尹姣[1] 薛银根[1] 乔红波[1] 李克斌[1] 胡毅[1] 曹雅忠[1] 

机构地区：[1]中国农业科学院植物保护研究所植物病虫害生物学国家重点实验室,北京100094

出　　处：《生态学报》2007年第6期2483-2489,共7页Acta Ecologica Sinica

基　　金：国家重点基础研究发展规划资助项目(2006CB102007);国家科研院所社会公益研究专项资助项目(2004DIB4J155)~~

摘　　要：根据粘虫的产卵习性,在田间分别测定了置于活体寄主和干枯植物上的卵块被捕食的概率,结果表明,枯草上面的隐蔽卵块被捕食的概率最低,与雌蛾的产卵习性相符,说明粘虫产卵选择习性有其生物学意义,即有利于躲避天敌。同时,实验结果表明粘虫幼虫的抗饥饿能力要强于甜菜夜蛾,是其对成虫产卵场所长期适应的结果。室内成虫对不同植物的产卵选择与田间相一致,光谱测定结果也表明绿色植物与雌蛾喜欢产卵的植物秸秆的光谱特征和波峰存在显著差异。观测粘虫雌蛾对不同颜色纸张的产卵选择发现,其喜欢在黄褐色纸张上面产卵,产卵量和产卵次数明显高于绿色纸张,而三者的光谱特征存在显著差异。The role of oviposition site selection by oriental armyworm Mythimna separata Walker in defence against natural enemies and the effect of color properties on the selection were investigated in laboratory and field. The predation and parasitism for eggs of M. separata were investigated in the habitats of wheat, corn and weed, by attaching the covered and exposed egg masses on the stems of green plant or on the habitats, the probability discovered by predator for exposed egg mass on the same type of plant, respectively. In whe stems of dead weed. The results showed that, in all types of egg mass was significantly higher in comparison with the covered at and weed habitats, the predation rate for exposed eggs was significantly higher than that for covered eggs on green plants. The predation rate for the exposed eggs on green plant, in the three types of habitats, was significantly higher than that covered eggs on dead weed respectively. However, no significant differences were found in the predation rate between the covered eggs and exposed eggs on dead weed stems in weed habitat and corn habitat. No parasitoid was found from the covered or exposed egg masses in the experiments. The results suggested that both covered site and dead plant were critical components for the successful defence against predators. The survival time of neonate larvae of M. separata without any food supply was significantly longer than that of beet armyworm,theory exigua, which lays eggs on the host plants suitable for offspring development. Our results support the refuge ＇ for M. separata that females provide enemy-free space for the offspring. In the choice test for oviposition preference among millet straw, wheat straw, green wheat plant, corn plant and wax paper, 87.42% of the eggs were laid on the millet straw. The number of eggs on other substrates almost can be neglected. The oviposition preference on different colour paper revealed that 49.69% and 36.73% of the eggs was laid on the straw-yellow paper and yellow paper, respectively,

关 键 词：粘虫 寄主选择 产卵场所 颜色 视觉 光谱 

分 类 号：S433[农业科学—农业昆虫与害虫防治]