From Longman Dictionary of Contemporary Englishpickerpick‧er /ˈpɪkə $ -ər/ noun [countable] → cotton picker/fruit picker etc
Examples from the Corpus
picker• The puffers are notorious biters and pickers and if placed with other fishes should be given plenty of room.• When they dressed up, they were more than asparagus pickers, berry pickers and cannery workers.• A fruit picker at 12, she now toils in the White House.• Yesterday, as the group of pickers went about their business, police said there had been no further incidents.• The market in 1994 was at best indifferent, rewarding only the most astute stock pickers.• Nigel sported pink sunglasses, pink-striped T-shirt, leather trousers and winkle pickers.• D' you reckon they wear winkle pickers? 