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State of California Department of Pesticide Regulation - page 91 / 104





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active ingredient (a.i.). the material in the pesticide formulation that actually destroys the target pest or performs the desired function.

acute effect. an illness that becomes ap- parent soon after an exposure to a pesticide occurs.

cause plant or animal diseases (plural: bacteria).

biofilm. a particular type of slime. Slime and biofilm organisms grow onto or penetrate surfaces and produce ad- hesive substances that make removal difficult.

acute onset. pertaining to symptoms of pesticide-related injury that appear soon after the exposure incident.

agricultural commissioner. the official in each county in California who has the responsibility for enforcing the state and federal pesticide regulations and issuing permits for restricted-use pesticides. County agricultural com- missioners and their staff frequently inspect pesticide applications and ap- plication sites. All agricultural uses of pesticides and some non-agricultural uses must be reported monthly to county agricultural commissioners.

agricultural use. the use of any pesticide, method or device to control plant, animal, or any other pests, or to regu- late plant growth or defoliate plants. It excludes pesticides labeled for:

  • (a)

    Home use.

  • (b)

    Structural pest control.

  • (c)

    Industrial or institutional use.

  • (d)

    Animal pest control with written

veterinarian prescription.

(e) Public agencies conducting pest control for State Department of Health Services.

algae. aquatic, nonvascular plants (singu- lar: alga).

attached-erect algae. a form of algae that grows attached to surfaces, such as water cooling tower reservoirs, and grow more or less straight up from the bottom and may resemble land plants.

autoclaving. a process that uses high pressure saturated steam for several minutes to sterilize objects.

bacterium. a unicellular microscopic plant like organism that lives in soil, water, organic matter, or the bodies of plants and animals. Some bacteria

blowdown. a process where cooling tower operators drain off some of the water in the system and add fresh water to reduce the concentration of salts and other dissolved materials that build up due to evaporation.

brand name. the registered or trade name given to a pesticide by its manufac- turer or formulator. A specific pesti- cide may be sold under several brand names.

California Department of Pesticide Regulation (DPR). the state agency responsible for regulating the use of pesticides in California.

cardiopulmonary resuscitation (CPR). a procedure designed to restore normal breathing after breathing and heart- beat have stopped.

caution. the signal word used on labels of the least toxic pesticides; these pesti- cides have an oral LD50 greater than 500 mg/kg and a dermal LD50 greater than 2,000 mg/kg.

certified pesticide applicator. a person who has demonstrated, through an examination process, the ability to safely handle and apply highly haz- ardous restricted-use pesticides.

chemical name. the scientific name given to a chemical compound to distin- guish it from other chemical com- pounds.

chlorophyll. a green pigment found in almost all plants and algae that absorbs sunlight and uses its energy to synthesise carbohydrates from CO2 and water. This process is known as photosynthesis.

chronic. pertaining to long duration or frequent recurrence.

chronic illness. an illness that will last for long periods. Cancer, respiratory



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