| 李定银, 郅军锐 *, 张 涛, 叶佳琴, 禹云超, 胡朝兴.草地贪夜蛾对4种寄主植物的偏好性[J].植物保护,2019,45(6):50-54. |
| 草地贪夜蛾对4种寄主植物的偏好性 |
| Preference of Spodoptera frugiperda to four host plants |
| 投稿时间：2019-08-12 修订日期：2019-08-14 |
| DOI：10.16688/j.zwbh.2019407 |
| 中文关键词: 草地贪夜蛾 偏好性 寄主选择 玉米 荞麦 菜豆 薏米 |
| 英文关键词:Spodoptera frugiperda preference host selection maize buckwheat kidney bean coix seed |
| 基金项目:贵州省国际科技合作基地（黔科合平台人才［2016］5802） |
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| 中文摘要: |
| 草地贪夜蛾入侵我国后, 对我国的粮食生产造成了严重威胁。为明确草地贪夜蛾对不同寄主的偏好性, 采用自由选择法研究了草地贪夜蛾对玉米、荞麦、薏米和菜豆植株的选择性和偏好性。结果表明, 草地贪夜蛾雌成虫在不同寄主上的产卵偏好性不同, 在玉米上的卵块数(14.5块)和卵粒数(1 631.5粒)最高, 显著高于其他3种植物。卵孵化率在菜豆上最低; 初孵幼虫在玉米和薏米上的存活率(96.3%和97.0%)均显著高于荞麦上(88.3%), 在菜豆上存活率(78.4%)最低。草地贪夜蛾3龄和4龄幼虫取食选择率从高到低为:玉米>薏米>荞麦>菜豆; 5龄幼虫不喜欢取食菜豆, 对其余3种寄主无明显的偏好。上述结果说明, 草地贪夜蛾成虫产卵偏好性和幼虫取食偏好性在4种寄主上差异明显, 其最喜欢玉米, 最不喜欢菜豆。 |
| 英文摘要: |
| Spodoptera frugiperda, an invasive insect pest, is seriously threatening China’s grain product. In order to clarify host preference of S.frugiperda to different host plants, the host selectivity and preference to corn, buckwheat, coix seed and kidney bean plants were measured by free choice test. The results showed that the oviposition preference of S.frugiperda to four host plants was different. There were 14.5 egg masses and 1 631.5 eggs on maize, which were significantly higher than those on other three plants. The hatching rate on kidney bean was the lowest. The survival rates of newly hatched larvae on corn (96.3%) and coix seed (97.0%) were significantly higher than those on buckwheat (88.3%) and kidney bean (78.4%). The feeding selectivity rates of 3rd and 4th instar larvae from high to low were corn>job’s tears>buckwheat >kidney bean. The feeding selectivity rate of 5th instar larvae to kidney bean was the lowest. Considering all the results, the preferences of S.frugiperda to host plants were significant differences, and it preferred corn most and kidney bean least. |
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