How to use: First place the bottom end of the trap in the soil; then remove the white paper backing from one or both sides. Alternatively (especially for aphids * and sciarid flies *), place the trap horizontally and remove the paper backing from the top surface. Small flying insects are attracted to the yellow color of the traps and stick to the glue. The traps will remain effective for several months. Replace sooner if more than half the surface is covered with insects or dust. More about: aphids: here * thrips: here *