Thiamethoxam 30% Fs Insecticide is an insecticide that is used to control a wide range of insect pests in crops. Thiamethoxam is the active ingredient, and it belongs to a class of chemicals called neonicotinoids. This is a flowable concentrate that can be easily mixed with water to make a spray solution for application to crops. Thiamethoxam 30% Fs Insecticide is widely used in agriculture and is also used in urban and suburban settings for controlling pests on ornamental plants and turf.