卵形刺甲的生物学和人工饲养

对卵形刺甲Platyscelis obvatus sp.nov.Ren的生物学和人工饲养进行初步研究。结果表明,该虫3年发生1代,世代重叠明显,3月上旬至5月下旬产卵,卵期20~45d,以幼虫和成虫越冬;人工饲养易于进行,可选用麦麸为其主要饲料成分,对于幼虫的饲料加入适量的酵母可收到良好的效果;成虫产卵量受性别比例影响明显,高比例的雄虫可显著提高产卵量;幼虫的生长与虫口密度密切相关,过高或过低皆不利于幼虫的生长。

The biological characters and artificial rearing of Platyscelis obvatus

The preliminary findings of biology and artificial rearing of the Platyscelis obvatus sp. nov. Ren was reported in this paper. It was known that P. obvatus completed one generation in three years and there was generation overlapping. Eggs were laid from early March to May, lasting for 20 - 45 days. Adults and larvae overwintered in soil. Artificial rearing was easily conducted with wheat bran as the main feed ingredients, in which adding yeast may obtain better results in the feeding of larvae. Adult fecundity was affected by the gender ratio significantly, higher amount of eggs with higher proportion of male. The growth of larvae was closely related to the population density, too high or too low unfavorable to the growth of the larvae.