Plants attract insects. Sometimes a bug stick trap can be as simple as a plant mosquito trap. The yellow sticky trap attracts unwanted insects with its bright yellow color. Also, once an insect falls on the mosquito trap you use for houseplants, it cannot fly away. Unlike the yellow sticky traps used for flying plant insects, these insects are trapped in our fruit fly traps through heat and rain. Protection is as simple as setting up sticky fly traps and letting them do their jobs.