Action threshold- The size of a pest population at which something must be done to manage it before too large. Factors to consider when determining how many pests are too many: Health hazards, economic damage, cosmetic damage, and personal tolerance.

Adaption- Modification of an organism or its parts that makes it more fit for existence under the conditions of its environment.

Arthropod- The phylum that contains organisms with jointed legs and segmented bodies. Includes insects, spiders, crustaceans, centipedes, and millipedes.

Biome- A major regional or global biological community, such as grassland, forest, or tundra, characterized chiefly by the dominant forms of plant life and prevailing climate.

Ecosystem- A system formed by the interaction of a community of organisms with their environment.

Host- Any organism on or in which another organism lives.

Hypothesis- A proposed explanation for an observation, phenomenon, or scientific problem that can be tested by further investigation.

Insect- Any of a large class of small, usually winged, invertebrates (animals without back-bones), such as beetles, flies, or wasps, having three body parts and three pairs of legs.

Integrated Pest Management- A Scientifically based decision-making process, which incorporates a variety of technological and management tactics to achieve long-term, environmentally sound pest suppression. Common-sense pest control focused on using multiple tactics and stressing prevention and other least toxic methods.

Larval Stage- The second developmental stage for an insect that has four-stage life cycle: egg, larva, pupa, adult. A larva is the immnature, wingless, feeding stage of an insect that undergoes complete metamorphosis to transition to the adult stage.

Mr.Yuk- The most commonly used and recognized poison education symbol in the United States. The Mr. Yuk face is used on product labels of hazardous materials to indicate they are poisonous.

Niche- The unique position occupied by a particular species, conceived both in terms of the actual physical area that it inhabits and the function that it performs within the community, where a living thing is found and what it does there. The term "niche" can include habitat, food sources, activities, and interactions with other living things.

Pathogen- Microorganism that causes and infection death in a host.

Parasite- An organism that lives on or in another organism (the host), causing harm to it.

Pest- An organism that is troublesome or destructive to people or their property. Pests can include some fungi, bacteria, weeds,and animals.

Pesticide- A chemical product designed to kill pest species.

Predator- An organism that kills and eats other organisms.

Prey- An animal that another animal eats.

Pupal Stage- The third developmental stage for an insect that hast a four-stage life cycle: egg, larva, pupa, and adult. The pupa does not feed and is usually immobile while it transforms from the larva to the adult stage.

Signal Words- A word printed on a pesticide label to indicate the potential hazard level to humans: caution(least hazardous), warning, danger, or danger-poisson (most hazardous).

Taxonomy- The science dealing with the descriptin, identification, naming, and classification of organisms into an ordered system that indicates natural relationship.

Terrarium- A transparent enclosure for keeping or raising plants or small animals indoor.

Toxic- A word that means "poisonous in cerain amounts".

Toxicity- The degree to wicha substance is toxic.

Variables- Factor present in a scientific experiment. Types of variables:

  • Independent Variable: the factor that is manipulated or changed in an experiment.

  • Dependent Variable: the factor that responds to or is determined by the independt variable in an experiment.

  • Control: all factor that remain unchanged in an experiment.

Vector- An organism that transmits a pathogen.