Buckthorn-potato aphid
cycle, with both winged and wingless forms of adults and a great variety in colour. In greenhouses, reproduction takes place by parthenogenesis, with unfertilized [...] caused by sucking of sap is rarely seen. Sometimes, large populations build up on potatoes or other hosts, which can cause growth retardation. Buckthorn- [...] generations of females. Aphids moult four times before reaching adulthood. With each moult they shed white skin, betraying their presence in the crop. Wingless