Why to use Yellow sticky traps Most of the pests have phototaxis, and yellow is the favorite color of common pests like aphids, leaf miner, fungus gnats, thrips, whiteflies, midges and so on, with this Trapro yellow sticky trap, pests just can not control themselves and keep flying towards it. ECO-Friendly 100% made from the non-toxic material, high and low temperature resistant and waterproof, controlling pests in a more Eco-friendly and economical way, ideal for garden, farm, houseplant and greenhouse use. How to use For trees or other large plants: Use the included wires to hung the yellow sticky traps on the branches; For small plants: Place the yellow sticky board tightly on a stick (not included), and insert stick it into the underground. Recommended using density for best performance, we recommend a using density of 25pcs/1 acre.