Cotton aphid
green to black, while aphids produced in overcrowded colonies at a high temperature can be much smaller (from 0.9 mm), and yellow or cream-coloured. Cotton [...] appearance of Cotton aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour. In greenhouses [...] shed white skin, betraying their presence in the crop. The cotton aphid can be distinguished from other aphids by the colour of the two cornicles (siphunculi)