寄主植物对甜菜夜蛾的发育和繁殖及体内酯酶活性的影响

在恒温(2 8±1 )℃条件下考察了葱、苋菜、豇豆、蕹菜、菜心5种寄主植物对甜菜夜蛾SpodopteraexiguaH櫣ｂｎｅｒ的营养效应及体内羧酸酯酶、乙?铛ッ富钚缘挠跋?,结果表明,不同寄主植物对甜菜夜蛾幼虫和蛹的发育历期、存活率、蛹重、雌成虫产卵量等有显著影响,其中对雌成虫产卵量的影响最大。雌成虫产卵量最高为取食菜心的处理,其次是取食葱的处理。寄主植物对甜菜夜蛾体内羧酸酯酶、乙酰胆碱酯酶活性也有显著影响,但这些酶的活性与发育历期、存活率、产卵量无明显相关性。在进行预测预报、田间防治时应充分考虑寄主植物对甜菜夜蛾发育历期、产卵量、解毒酶活性的影响。

Effects of five host plants on development, reproduction and activities of esterases of the beet armyworm(Spodoptera exigua )

The effects of 5 host plants(shallot, amaranth, cowpea,water spinach and flowering stem) on development and reproduction of beet armyworm, Spodoptera exigua Hübner were studied under constant temperature(28±1℃). The results showed that there were significant differences on the development duration, survival rate, pupa weight, numbers of the eggs laid per female of the beet armyworm feeding on different host plants, in which the difference in the numbers of the eggs laid per female was the most remarkable. The highest number of female progeny was recorded on flowering stem, and then on shallot. The results also showed that host plants exerted significant influence on the activities of carboxylesterase and acetylcholinesterase in the beet armyworm, but the activities of the enzymes were not correlative significantly to the development duration, survival rate and numbers of the eggs laid per female. The host plants should be considered in the beet armyworm prediction and control.