Commodity Fumigation License Practice Exam

Chisel applicators are typically used to inject fumigants at what depth?

1. 2-4 inches

2. 4-6 inches

3. 6-8 inches

4. 8-10 inches

The correct answer is: 6-8 inches

Chisel applicators are designed to inject fumigants into the soil at a depth of 6-8 inches, which is optimal for ensuring that the chemicals reach the targeted pest population effectively. This depth allows for sufficient penetration of the fumigant to interact with the pests while minimizing evaporation and other losses that could occur if the fumigant were applied at shallower depths. Additionally, applying the fumigant at this depth helps in achieving a uniform distribution in the soil, which is critical for the effectiveness of the fumigation process. This technique is particularly important for controlling soil-borne pests and pathogens that reside within that specific depth range.