126 • GLOSSARY
LD50. the lethal concentration of active ingredient that will kill 50% of a large population of test animals. LD50 is usually expressed as the milligrams (mg) of pesticide per kilogram (kg) of body weight of test animals. LD50 is used to measure oral toxicity and acute dermal toxicity.
limited contact. when performing necessary and unforeseen tasks such as irrigation in a pesticide-treated area, and contacting foliage or other plant parts or other surfaces or objects that contain pesticide residues, exposure is minimal and limited to the feet, legs below the knees, hands, and arms below the elbows.
medical supervision. occupational health guidance and necessary associated health evaluation by a physician licensed to practice medicine.
mill assessment. an assessment, described in the California Food and Agricultural Code, on each dollar’s worth of pesticides sold in California. The assessment partially funds the state’s pesticide regulatory program.
mitigation measure. a condition attached to the approval of an activity which, if implemented, would substantially reduce any adverse impact, taking into account economic, environmental, social, and technological factors and timeliness of control.
mutagenic. the property of a substance or mixture of substances to induce changes in the genetic complement of either somatic or germinal tissue in subsequent generations.
neurotoxic. any adverse effect on the nervous system, such as delayed- onset locomotor ataxia, resulting from a single administration of the test substance, repeated once if necessary.
notice of intent. an oral or written notification to the agricultural commissioner, as specified by the agricultural commissioner, prior to the use of a pesticide pursuant to a permit.
nuisance. any lot of produce that is found to carry pesticide residue in excess of any maximum, or in excess of a permissible tolerance, together with its containers, is a public nuisance.
nursery. any operation engaged in the outdoor commercial or research production of cut flowers or ornamental cut greens or any plants that will be used in their entirety in another location.
oncogenic. the property of a substance, or a mixture of substances, to produce or induce benign or malignant tumor formations in living animals.
operator of the property. a person who owns the property or is legally entitled to possession of property, through a lease, rental agreement, trust, or other management arrange- ment.
organophosphates. organophosphorus esters, which inhibit cholinesterase.
parts per million (ppm). the number of parts of toxicant per million parts of the subject in question. They may include residues in soil, water, air, fruits and vegetables, and whole animals.
permissible exposure limit (PEL). the permitted maximum exposure to an airborne contaminant in an 8-hour workday.
person. an individual, partnership, association, corporation, business entity, or organized group of persons, whether incorporated or not.
personal protective equipment (PPE). apparel and devices worn to minimize human body contact with