A soil sterilant that yields plant control for longer than two years is categorized as which type?

A soil sterilant that yields plant control for longer than two years is categorized as which type?

• A. Temporary Sterilant
• B. Semi-permanent Sterilant
• C. Soil fumigant
• D. Permanent Sterilant

Answer: (D)

Durations of plant control define the category of a soil sterilant. If a soil sterilant provides plant control for longer than two years, it’s considered a permanent sterilant. Temporary sterilants are meant to suppress growth for a single season or less, while semi-permanent sterilants last longer than a season but not indefinitely. A soil fumigant is a different type of soil-applied chemical focused on pest control through vapors and isn’t categorized by long-term plant suppression. So, lasting longer than two years fits the permanent sterilant category.

Durations of plant control define the category of a soil sterilant. If a soil sterilant provides plant control for longer than two years, it’s considered a permanent sterilant. Temporary sterilants are meant to suppress growth for a single season or less, while semi-permanent sterilants last longer than a season but not indefinitely. A soil fumigant is a different type of soil-applied chemical focused on pest control through vapors and isn’t categorized by long-term plant suppression. So, lasting longer than two years fits the permanent sterilant category.