South Carolina Turf and Pest Control Category 3 Practice Test

When protecting white grubs, the insecticide must reach the soil where they live, so you should water the area after application. Watering moves the product from the surface into the root zone, through soil pores to the depths where grubs feed. It helps activate some formulations and ensures even distribution, improving contact with grubs and increasing effectiveness. Skipping watering leaves much of the product on the surface and reduces how well it reaches the target pests.