Colorado Qualified Supervisor (QS) and Certified Operator (CO) Pesticide Practice Test

Chemigation is the practice of applying pesticides through irrigation systems, using the irrigation water to move the chemical into the crop root zone. This method can provide uniform distribution when done with pesticides labeled for chemigation and the proper equipment, including a calibrated injection system and a backflow-prevention device to protect water sources. Always follow label directions and regulatory requirements to prevent contamination of water or non-target organisms. Other methods described—mixing pesticide with fertilizer (fertigation), applying pesticides from aircraft (aerial application), or applying pesticides to seeds (seed treatment)—are different approaches and not chemigation.