Category E: Turf and Ornamentals Minnesota Pesticide Exam Questions With Complete Solutions.

Abiotic - related to factors or things that are separate and independent from living things; nonliving (air pollutants, wind, water, temperature) Abiotic stresses - Caused by unfavorable growing conditions (drought, wind, flood) Absorption - The movement of pesticides into plants and, to a lesser degree, soil microorganisms. Adjuvant/Additive - Substance added to a pesticide to improve its effectiveness, usability or safety such as penetrants, spreader-stickers, storage stabilizers and wetting agents. adventitious roots - roots produced by certain stems if roots are separated from the plant or if injury occurs. Adsorption - Adhesion of an ultra thin layer of molecules to the surface of particles. The molecules do not penetrate the surface. Aesthetic threshold - pest population density level when pest management methods must be applied to prevent reaching unacceptable levels of aesthetic damage to a plant or landscape Alleopathy - chemical inhibition of one plant by another Annual - A plant that completes its life cycle in one year Aquatic life - Fish, invertebrates and others that live in water. Bacteria/Bacterium - Single celled organisms, some of which cause disease in plants and animalsBactericide - A chemical used to control bacteria. Backflow - Reverse flow of a liquid (such as a pesticide) into a water supply. Backflow can occur during chemigation or when filling tanks