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饲养粉斑螟的效果,作为赤眼蜂中间寄主,以出卵量为最终目标。影响出卵量大小的主要因素为成蛾率及雌蛹重。饲养效果除饲料品种外,还和品种加工成品的性状等有关,在干燥环境,饲料的含水量亦有很大影响。 饲料的选择应因地制宜并精粗搭配,以提高经济效益。玉米粉可作为精饲料,增加玉米粉的含量可相应增加蛹重。米糠、麦麸等为一般饲料,玉米芯粉与一次饲养后未经幼虫充分利用的剩余饲料亦可作为粗饲料加以利用。 增加幼虫的饲养量,在一定限度内,可相应增加所获的虫数,而对成活率无显著影响,但蛹重则随饲养量的增加而相应减轻。所以,应全面考虑,以获得最大饲养效果和经济效益。
The effect of feeding the leaf-spot insects, as the middle of Trichogramma host, the amount of eggs as the ultimate goal. The main factors that affect the size of oviposition are the female moth rate and female pupa weight. Feeding results in addition to feed varieties, but also the properties of processed products and other varieties related to dry environment, feed moisture content also has a great impact. Feeds should be selected according to local conditions and fine with coarse, in order to improve economic efficiency. Corn flour can be used as concentrate feed, increase the content of corn flour can be a corresponding increase in pupal weight. Rice bran, wheat bran and other general feed, corn cob powder and a reared without feeding the remaining feed can also be used as roughage. Increasing the feeding amount of larvae, within a certain limit, may increase the number of insects obtained without any significant effect on the survival rate, but the pupa weight decreases correspondingly with the increase of the feeding amount. Therefore, we should fully consider in order to obtain the maximum feeding effect and economic benefit.