Deborah from Cedar Hill, Texas writes
For Grubs, Merit 0.5 G Insecticide Granules are applied once a year at the max rate of 1.8lbs per 1000 sq ft or 80lbs per acre per year. A second application is not advised as you are applying at the maximum rate already. Merit Granules are most effective when applied prior to, or just after, grub eggs hatch. It is important that the application be followed by sufficient irrigation or rainfall to move the active ingredient through the thatch layer. If the granules cannot penetrate the soil adequately, the grubs will not be affected. Japanese Beetles (adults) emerge in early summer after significant rainfall or irrigation, mate and then lay their eggs about 4 to 6 weeks later. Timing for prevention treatment of grubs in late June to mid July are usually ideal as this is just before or right at when grub eggs are hattching. Under normal circumstances, Merit 0.5 Granules will provide about 4 months of residual control. For actively feeding grubs now, it would be recommended to use Dylox 6.2 Granules as this kills actively feeding grubs for 48 hours. View the full Dylox 6.2 product label for more information as well as our Grub Treatment Guide for additonal infromation and tips.
Answer last updated on: 09/29/2021
