What are sticky traps for gnats?
Sticky traps are usually yellow sticky plastic because gnats are naturally attracted to yellow things. Perhaps they think it is a flower. That gnats get on to and get stuck and die.
Yellow sticky traps as a pesticide and poison-free way to get rid of gnats and fruit flies. Eco-friendly and cheap.
How many sticky traps are there?
One trap per 250 square feet — or one per 1000 square feet in larger or monoculture greenhouses — and checked, pests counted, on a regular schedule, changed as needed, and the results charted, sticky traps
can be an effective Trapping and monitoring tool.
Are all sticky traps the same?
Some sticky traps
also include some type of scent to entice certain pests. A sticky trap
may also be a hanging trap, in multiple colors. The type that sits on surfaces really only works for crawling bugs, like spiders or cockroaches. Flying insects can't be trapped that way.
Use yellow sticky traps
to trap/monitor most pests. (Includes whiteflies, fungus gnats, shore flies, thrips, winged aphids, leafminers, scales, and many others). But be aware they may inadvertently capture parasitic wasps, midges, and beetles. Use with care. Reduce hang duration if needed, just be consistent.
Use blue traps for thrips only, which is helpful if you need to monitor for thrips while excluding the inadvertent capture of parasitoids like Aphidius spp. and other at-risk biocontrols. Hot pink is supposed to be another good color for thrips but is not a commercially available trap color.