Washington State Pesticide License Exam Review: Aquatic Terms And Other Need To Knows

back-siphoning {Ans: fluid or spray material siphoning from a sprayer back to an original water source}LD50 {Ans: Dose necessary to kill 50% of a test animal population, expressed in mg of toxicant per kg of body weight}acute oral LD50 {Ans: the single oral dosage required to kill 50% of the test animals in toxicity studies}growth regulator {Ans: a substance used for controlling or modifying plant growth processes without appreciable phytotoxic effects at the recommended dosage}tank mix {Ans: combining two or more compatible chemicals in a spray tank in order to apply them simultaneously}ULV {Ans: ultra low volume application uses high velocity-concentrated pesticide to generate extremely small droplets}