For infested root zones, we recommend a day of drench, followed by a day of spray, followed by one day off. The day off allows the plant to rest because drenching and spraying can stress the plant during this process. If the grower notices any adverse reaction like wilting or other phytotoxic reactions, they should add more days off between the drench and spray routine. This rotation is repeated over a two week period to knockdown larvae dwelling in the root-zone and adults in the foliage.
Our IPM Drench Procedure is designed to reduce bug pressure enough to get the plants (in that run) to harvest. Once successful, remove the root zone of all plants and start over.
Download Fungus Gnat Procedure