These handy lures allow for early detection of thrips and can help save your valuable crops/ornamentals, while saving on costly sprays by treating early. The thrip lure is a controlled slow release attractant that draws the thrips into the close proximity of a yellow sticky card (sticky traps sold separately). Tests have shown yellow sticky cards can catch 3 times as many as thrips compared to untreated yellow cards. Each lure lasts 2-3 weeks. Use at least one lure per tree or one per 500 sq. ft. of greenhouse space.