Alabama Pesticide Applicator Study Guide: Chapter 1 with Complete Solutions

Alabama Pesticide Applicator Study Guide: Chapter 1 with Complete Solutions Pests Living things that compete with us for food, fiber, or space, or attack us directly. Insects Have six jointed legs, three body segments. Wings and mouthparts Most important identifiers of insects. Metamorphosis The change in shape, form, and size during a life cycle. Nymph This hatches from an egg, looks like a tiny adult, and grows into a winged adult. 4 stage metamorphosis Egg, larva, pupa, adult Arachnids Eight jointed legs, two body regions, no wings Snails and slugs Mollusks, feed on plant foliage. Vertebrates Pests with Jointed backbone Plant disease agent Any harmful condition that makes a plant different from a normal plant in function or appearance. Ex. of non living agents Nutrient deficiency, extreme temperatures, toxic chemical, mechanical injury and to much/little water. This is required for parasitic disease development Susceptible host, parasitic agent, favorable environment for parasite. Fungi Lack chlorophyll and spread through spores Bacteria Single-celled plants Viruses Can be spread by insects, bulbs, roots, cuttings, seeds, and by touching infected plants. Nematodes Small roundworms with hollow feeding spears used to puncture plant cells and feed on its content. Inoculation Arrival of disease causing agent at point where infection can occur. Incubation A period of waiting for favorable conditions before injury occurs. Infection When an organism actively inhibits the host plant. How a plant responds to infection Overdevelopment, underdevelopment, death of tissue. Weeds Plants that interfere with human activity or welfare. Grasses Narrow upright leaves with parallel veins.