Commodity Fumigation License Practice Exam

What can influence the required dosage of fumigants?

1. Temperature variations

2. Commodity type and sorption levels

3. Pest susceptibility

4. Humidity levels

The correct answer is: Commodity type and sorption levels

The required dosage of fumigants is influenced significantly by the type of commodity being treated and its sorption levels. Different commodities absorb fumigants to varying degrees, which directly impacts the effectiveness of the treatment. For instance, grains may have different sorption characteristics compared to dried fruits or spices, meaning that the amount of fumigant needed will vary depending on the specific commodity’s physical and chemical properties. When considering sorption levels, it is vital to understand that commodities with higher moisture contents or specific structures may hold onto the fumigant differently, requiring careful calibration of the dosage to ensure effective pest control without causing damage to the commodity itself. While factors like temperature, pest susceptibility, and humidity can also affect fumigation outcomes, they are part of broader categories that indirectly influence dosage or are less critical compared to the specific characteristics of the commodity and its interaction with the fumigant. Thus, the main factor in determining the required dosage remains the type of commodity in conjunction with its sorption levels.