不同寄主植物与斜纹夜蛾喜食程度、生长发育及存活率的关系研究

研究了不同寄主植物与斜纹夜蛾喜食程度、生长发育及存活率的关系结果表明 ,斜纹夜蛾喜食植物依次为槟榔芋 >莲藕 >甘蓝 >青菜 >水蕹菜 >黄牙白 >棉花 >大豆 >萝卜 >豇豆 >木耳菜 ;较喜食植物依次为花生 >芝麻 >酸模叶蓼 >四叶萍 >甘薯 >绿豆 >黄瓜 ;其余为次要寄主植物。斜纹夜蛾幼虫取食不同寄主植物 ,其发育历期、蛹重、蛹羽化出成虫比率均有显著差异 ,取食芋头、水蕹菜、青菜、甘蓝、豇豆和莲藕等作物叶片的幼虫发育历期较短 ,蛹较重 ,蛹羽化率较高 ,而取食棉花、大豆和向日葵叶片的幼虫历期相对较长 ,蛹较小 ,蛹羽化率相对较低。

The correlations of the different host plants with preference level, life duration and survival rate of Spodoptera litura Fabricius

The correlations of the different host plants with preference level, life duration and survival rate of S. litura Fabricius show that the most preference plants of S. litura Fabricius are Ver. cormosus, Nelumbo nucifera, Brassica oleracea, Brassica chinensis, Ipomoea aquatica, Brassica compestris, Gossypium hirsutum, Glycine max, Raphanus sativus, Vigna sesquipedalis, Basella alba, respectively. The preference plants are Arachis hypogaea, Sesamum indicum, Polygonum lapathifolium, Marsilea quadrifolia, Ipomoea batatas, Phaseolus radicalum, Cucumis sativus, respectively. The secondary host plant are others. There are significant differences among the duration of larvae, weight of pupa and emerging rate when the larvae are fed on the different host plants. The duration of larvae is shorter, the pupae are weighter and the emerging rate is higher when the larvae are fed on Colocasia esculenta, Ipomoea aquatica, Brassica chinensis, Brassica oleralea, Vigna sesquipedalis, Nelumbo nucifera, etc. The duration of larvae is longer, the pupae are smaller and the emerging rate is lower when the larvae are fed on Gossypium hirsutum, Glycine max, and Helianthus annuus.