人工饲料与天然饲料饲养条件下烟青虫的生长发育和繁殖力比较

报道饲养烟青虫HelicoverpaassultaGue澖ee的一种人工饲料,比较了烟青虫取食该饲料和天然饲料的主要生物学指标,测定了6龄幼虫对2种食料的转化和利用率。该人工饲料的主要成分是麦胚、黄豆粉、酵母粉和烟叶粉,天然饲料为烟草叶片。结果表明:取食人工饲料的烟青虫幼虫生长发育快,化的蛹较大,成虫寿命长,产卵量大,所产卵孵化率高;取食人工饲料的烟青虫与取食烟草蒴果的相比,前者相对取食量和近似消化率较高,相对生长率无显著性差异。说明烟青虫对该人工饲料有较好的适应性,可以作为繁殖烟青虫的实用饲料。

Growth, development and fecundity of oriental tobacco budworm, Helicoverpa assulta, reared on an artificial diet and a natural plant diet

An artificial diet for mass rearing Helicoverpa assulta Gueńee was formulated in the laboratory,and some main biological parameters of the larvae fed on the artificial diet and natural plant diet were compared.The artificial diet was mainly composed of wheat germ,soybean flour and yeast powder,and the natural diet were the mature leaves from tobacco plants.The result indicated that the H. assulta reared on artificial diet showed faster laval growth and development,higher pupal weight.longer adult longevity,higher fecundity and egg hatching than those on the natural food.The larvae fed on the artificial diet showed higher relative consumption rate(RCR) and approximate digestibility(AD) than those on tobacco fruit,but there were no significant differences in relative growth rate(RGR) between two diets.It indicated that the developed artificial diet is suitable for rearing H. assulta.