E from St Louis, Mo writes
My greenhouse is built out of cedar lumber. I can see tiny insects running across the shelves as well as on top of the soil of some of my potted cacti. If I spray down the cedar wood shelves, how long will the zeta cypermethrin remain effective?
Sevin Concentrate, containing the active ingredient of Zeta-Cypermethrin, has a residual kill of up to 3 months when used as instructed on the product label. Keep in mind, however, that this product is not labeled for use inside of greenhouses. You can apply this to the exterior of structures and to plants outdoors.
Answer last updated on: 06/28/2021
