Ornamental and Turf Pesticide Applicators Practice Exam

What is an important consideration when using insecticides for grub control?

1. Applying at any time of day

2. Watering in after application

3. Using them during a dry period

4. Sowing them into the soil

The correct answer is: Watering in after application

Watering in after the application of insecticides is crucial for effective grub control. This practice helps to ensure that the pesticide penetrates the soil and reaches the target pests, which are typically located beneath the surface. Many insecticides require moisture to activate their ingredients, facilitating their movement through the soil and increasing the likelihood of contact with the grubs. Properly watering in the treatment not only enhances the efficacy of the product by aiding in its distribution but also minimizes the risk of runoff or degradation from environmental factors such as sunlight. In contrast, applying at any time of day may not take into account optimal environmental conditions for application, which can impact the performance of the pesticide. Using insecticides during a dry period is less effective because the lack of moisture can hinder the absorption of the treatment into the soil. Sowing insecticides into the soil is generally not a standard application method for these products and can lead to inconsistencies in effectiveness.