Brian from Ri writes
I put down a 10 foot wide barrier of Bifen granules in the lawn around our house to keep carpenter ants from entering. I planned to take advantage of natural rainfall to water the granules into the lawn. Unfortunately, what was forecast to be rain showers turned out to be 4 inches of rain as measured in our rain gauge. I don't think the water actually ran off and took the insecticide with it. However, will just the large amount of rainfall decrease its effectiveness in the soil? Should I apply another treatment?
A large amount of rain fall should not take away the effectiveness of Bifen Granules. especially if there was no run off. You would want to reapply in 2 months time.
Answer last updated on: 06/11/2013
