Category E: Turf and Ornamentals Minnesota Pesticide Exam (Terms to Know) Latest Updated

Abiotic - Answer related to factors or things that are separate and independent from living things; nonliving (air pollutants, wind, water, temperature) Abiotic stresses - Answer Caused by unfavorable growing conditions (drought, wind, flood) Absorption - Answer The movement of pesticides into plants and, to a lesser degree, soil microorganisms. Adjuvant/Additive - Answer Substance added to a pesticide to improve its effectiveness, usability or safety such as penetrants, spreader-stickers, storage stabilizers and wetting agents. adventitious roots - Answer roots produced by certain stems if roots are separated from the plant or if injury occurs. Adsorption - Answer Adhesion of an ultra thin layer of molecules to the surface of particles. The molecules do not penetrate the surface. Aesthetic threshold - Answer 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 - Answer chemical inhibition of one plant by another Annual - Answer A plant that completes its life cycle in one year Aquatic life - Answer Fish, invertebrates and others that live in water. Bacteria/Bacterium - Answer Single celled organisms, some of which cause disease in plants and animals Bactericide - Answer A chemical used to control bacteria. Backflow - Answer Reverse flow of a liquid (such as a pesticide) into a water supply. Backflow can occur during chemigation or when filling tanks. Beneficial insects - Answer Insects that are essential for pollination of plants or play a role in plant health care. Biennial - Answer A plant that requires