Greenhouse leaf tier webs the leaves or flower buds together. The insect feeds on the undersides of the leaves. No chemical control is listed. Slugs may be detected by the silvery slime trails they leave. Slugs can be controlled with slug baits used according to label directions.
Mites are the most frequent pest on marigolds especially during hot weather.
The leaves lose their green color and severe infestations cover the plant with fine webbing. Use applications of Diazinon dust. Visuals associated with this text. This information is for educational purposes only. References to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned.