Brent writes
When applying ImidaPro 2SC for grub control, it is important to use sufficient water when applying to move the active ingredient through the thatch layer of grass into the soil where the insects will be or are feeding as soon as possible. This is usually an extra 1/4 inch to 1/2 inch of rainfall or irrigation with the application. As long as you do not have excessive rainfall while the application is still wet, and/or the ground is not saturated, then you should have residual activity for several weeks following the application. To control White grub larvae, (such as Japanese beetle larvae, Chafers, Phyllophaga spp., Asiatic garden beetle, Oriental beetle) apply 0.46 to 0.6 fluid ounces (14 to 17 mL) per 1,000 sq. ft. Make broadcast applications by mixing specified rate in enough water to uniformly cover the treated area. Do not use less than 2 gallons of water per 1,000 sq. ft. Please refer to the product label for complete application instructions.
Answer last updated on: 01/17/2018