CDFA Pest Prevention Plant Regulation Practice Exam

Which species is listed as a secondary noxious weed in the Ag Code?

1. Jimson weed

2. Perennial sowthistle

3. Halogeton

4. Blueweed

The correct answer is: Halogeton

The correct answer is Halogeton, which is recognized as a secondary noxious weed in the California Agricultural Code (Ag Code). Secondary noxious weeds are those that may not be as harmful or widespread as primary noxious weeds but still pose a threat to agricultural crops and economic interests. Halogeton, in particular, is known to thrive in disturbed areas and can outcompete desirable plant species, affecting pastureland and crop production. Jimson weed, perennial sowthistle, and blueweed, while they have their own pest challenges, are classified differently and do not fall under the category of secondary noxious weeds as established in the Ag Code. This distinction is important for agricultural management and regulatory measures aimed at controlling the spread of weeds that can cause economic damage. Understanding these classifications helps in identifying appropriate control strategies and compliance with agricultural regulations.