How much rainfall or irrigation is required 2-3 days after applying Devrinol 50-DF ornamental to warm season turf grasses?

The correct answer reflects the recommended amount of rainfall or irrigation needed after applying Devrinol 50-DF to ensure effective herbicide performance. Devrinol 50-DF is a pre-emergent herbicide used to prevent the germination of certain weeds in warm season turf grasses.

Watering the area with half an inch of irrigation or rainfall within 2-3 days post-application is essential, as it helps to incorporate the herbicide into the soil where it can create a barrier against weed seed germination. This sufficient amount of moisture ensures that the active ingredient is activated and dispersed properly in the soil, optimizing its effectiveness while minimizing the risk of runoff or degradation from exposure to the elements.

Inadequate watering could lead to insufficient activation of the herbicide, potentially allowing weed seeds to germinate. Conversely, too much water might wash away the chemical before it has had a chance to effectively bind to the soil particles.

Thus, the prescribed amount of half an inch is ideal for achieving optimal results when using Devrinol 50-DF on warm season turf grasses.