brussels sprout whitefly aleyrodes proletella pest brassica oleracea cabbage harmful adults larvae underside leaf plant

brussels sprout whitefly aleyrodes proletella pest brassica oleracea cabbage harmful adults larvae underside leaf plant problem farm agricultural cultivation planting crops europe farming agriculture leaves plants insect vegetable garden flower green eggs vegetables itis species parasite many chinese summer gardening fly nature spring adult spray exterminator czech pesticide chemical sprays