VA Core Manual: Applying Pesticides Correctly: Unit 2. Principles of Pest Control - Terms to Know Rated A+

VA Core Manual: Applying Pesticides Correctly: Unit 2. Principles of Pest Control - Terms to Know Rated A+ Annual A plant that completes its life cycle in one year Appendage An animal body part or organ that projects from the main part of the body Arthropod An animal with jointed legs and a segmented, jointed outer skeleton Biennial A plant that completes its life cycle in two years. The first year it germinates and grows. The second year it continues to grow, produces fruit and seeds, and then dies Control To kill, to prevent or lessen the harmful effects of, to destroy or to repel an undesirable organism Dicot Plant with two seed leaves (cotyledons) and broad, net-veined leaves. As a rule, flower parts are in multiples of four or five (ex. four, five, or 10 petals) Disease An abnormal, unhealthy condition caused by an invading organism such as a bacteria or a virus Gall Abnormal plant growth caused by stimuli from an insect or other organism Host An organism infected by a parasite; a plant or animal on or in which a parasite lives Integrated Pest Management (IPM) A system that uses all suitable pest-control measures together in a way that keeps pest populations below the levels that cause economic injury Invertebrate An animal without a backbone Juvenile Hormones Natural insect chemicals that keep the earlier stages of an insect from changing into the normal adult form Metamorphosis Change in body form during the life cycle of an organism Mode of Action How a pesticide works; the way it controls a pest Mollusk A soft-bodied, invertebrate animal, usually protected by a shell. (Ex. clams, snails, and slugs) Monitoring Determining the size and distribution of a pest population in an area Monocot Plant with one seed leaf and narrow, parallel-veined leaves. As a rule, flower parts are in threes or multiples of three (ex. three, six, or nine petals) Nematode A microscopic, eel-like roundworm