FlyWeb cards are incredibly versatile and are traditionally hung from branches to monitor and control insects like aphids, fungus gnats, whiteflies, thrips, and leaf miners. Yellow/Yellow cards are ideal for small flying insects such as aphids and whiteflies when hung from branches. Yellow/Blue Cards will help attract thrips and leafminers as well as all the previously mentioned pests.
For adult fungus gnats, create a physical barrier by placing the cards around the base of the stem–adults will become trapped on the cards as they leave or enter the area. For soil-borne insects or protection of young plants, perforations allow for placement at the base of the plant and can be hung without having excess weight on developing branches.