Corpus allatum activity associated with development of wingbuds in cabbage aphid embryos and larvae

摘要: Abstract Histological studies of cabbage aphid embryos show that the presence or absence wingbuds and size depends on age form parent aphid. The processes growth in alatiform larvae, their regression apteriform are described. bears a close relationship to activity corpus allatum parents larvae. Even when prenatally determined as apterae, aphids seldom lose all trace before birth. extent loss appears depend maternal time during which an embryo is exposed particular hormonal environment. In postnatal determination individual be controlling factor. It shown results decapitation experiments carried out by other workers not necessarily incompatible with this interpretation determination.