四种食料植物对斜纹夜蛾生长发育及营养指标的影响

Development and nutrition of Prodenia litura on four food plants.

在室内平均温度28.1℃,平均相对湿度84.0%的条件下研究了蓖麻、豇豆、番木瓜和香蕉等4种食料植物对斜纹夜蛾Prodenia litura(Fabricius)生长发育及营养效应的影响。结果表明:不同食料植物对斜纹夜蛾的幼虫发育历期、蛹重及营养效应等均有显著差异。幼虫发育历期以蓖麻组最短(9.93 d),香蕉组的最长(15.84 d);蛹重以蓖麻组最重(377.8 mg),香蕉组最轻(245.6 mg);幼虫存活率蓖麻组最高(98%),香蕉组最低(66.0%);斜纹夜蛾幼虫的相对取食量、近似消化率和相对生长率等以蓖麻组最高(分别为5.46,68.49,0.53),而以香蕉组最低(分别为0.86,16.30,0.26)。斜纹夜蛾嗜食蓖麻等,而不喜食香蕉。

The effects of four food plants （castor,cowpea,papaya,and banana） on the development and nutriention of Prodenia litura were studied under 28.1℃ of laboratory temperature and 84.0% of relative humidity. The results showed that there were significant differences in developmental duration of larvae, pupa weight and nutrient function of the P. litura when fed on the four food plants. Among them, the larvae fed with the castor has the shortest developmental duration （9.93 d） and heaviest pupa weight （377.8 mg） , while the larvae fed with the banana has the longest developmental duration （15.84 d） and the lightest pupa weiht （245.6 mg） ; the survival rate of the larvae was 98 % when fed with the castor, while 66.0 % when fed with banana; the consumption index, approximate digestibility, and relative growth rates of P. litura were the highest （5.458,68.492,0.531） when fed with castor, and those with banana were the lowest （0. 860,16.300,0.255）. The castor is a more sutible food plant to P. litura than bnana.