QAL Plant Agriculture Correct answers!!2024

No Observable Effect Level (NOEL) - correct answers the maximum dose level of a pesticide that produces no noticeable toxic effect on test animals Threshold Limit Value (TLV) - correct answers a chemical's airborne concentration in parts per million that produces no adverse affects over time Organochlorine - correct answers one of the original synthetic pesticides, used for mites and insects, some highly poisonous to mammals, breaks down slowly, most early formulations now banned: DDT, chlordane, toxaphene, dieldrin Organophosphates - correct answers some of the most acutely toxic chemicals, many formulations are absorbed through the skin, lungs, or digestive tract, they interfere with animal and human nervous systems similar to carbamates, they break down rapidly, common formulations include malathion, diazinon, chlorpyrifos Carbamates - correct answers synthetic organic pesticides, they break down rapidly, they impair nerve function, they are highly toxic to mammals but does not build up in tissue, common formulations include carbaryl, methomyl, metam-sodium, metam-potassium Triazines - correct answers important herbicide used to control broadleaves and grasses, used as a preemergent and postemergent, they inhibit photosynthesis, they persist in soil and move with water and are frequently detected in waterways, they are toxic to mammals and fish, common formulations include atrazine, simazine, prometryn Neonicotinoids - correct answers insecticide that mimics the efforts of nicotine, disrupts the central nervous system causing paralysis and death, less toxic to mammals than organophosphates