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

whitefly aleyrodes proletella pest brussels sprout 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