WASHINGTON PESTICIDE STUDY GUIDE QUESTIONS AND
ANSWERS 2025/2026 ALL RATED A+
✔✔detoxify - ✔✔render poisonous chemical harmless
✔✔dispersing agent - ✔✔adjuvant that facilitates mixing and suspension of pesticide
formulation in water
✔✔dept of labor and industries - ✔✔DLI
✔✔dormant spray - ✔✔pesticide application shortly prior to resumption of plant growth
✔✔dose - ✔✔quantity of pesticide applied to a given area
✔✔emulsifier - ✔✔chemical which aids suspension of one liquid in another
✔✔EPA establishment number - ✔✔EPA-assigned number for each pesticide factory
✔✔EPA registration number - ✔✔EPA-assigned number for a product, on all labels
✔✔fetotoxic - ✔✔ability to harm fetus, not necessarily deformities
✔✔field scout - ✔✔person who samples fields for pests
✔✔Federal Insecticide, Fungicide, and Rodenticide Act - ✔✔FIFRA
✔✔forecasting - ✔✔prediction of pest incidence, based on weather, host, and pathogen
characteristics
✔✔formulation - ✔✔pesticide product as purchased
✔✔fungistatic agent - ✔✔prevents germination of fungus spores or mycelium growth.
Doesn't kill fungus.
✔✔hemotoxic - ✔✔causes blood disorders
✔✔illegal residue - ✔✔pesticide remaining on crop above allowed level, or prohibited
pesticide at any level
✔✔incompatible - ✔✔2 or more materials which cannot be mixed or used together
✔✔inoculum - ✔✔portion of the pathogen that can cause disease in the host
, ✔✔integrated pest management - ✔✔use of all suitable pest control methods to keep
pest populations below economic injury. Cultural practices, biological/physical/genetic
control, selective pesticides
✔✔label - ✔✔all printed material attached to or part of a pesticide container
✔✔labeling - ✔✔supplemental pesticide info which complements the label, not
necessarily attached.
✔✔LC50 - ✔✔concentration of pesticide, usually in air or water, that kills half a test
population. Usu expr in ppm
✔✔LD50 - ✔✔dose or amt of pesticide that kills half a test population when eaten, or
absorbed through skin. (mg/kg)
✔✔leaching - ✔✔movement of substance through soil with water
✔✔metabolite - ✔✔compound derived from changes in active ingredient through
reactions.
✔✔microbial degradation - ✔✔breakdown of chemical by microorgs
✔✔microbial pesticide - ✔✔microbes used to control pests.
✔✔biorationals - ✔✔microbial pesticides
✔✔microbial pesticide (aka) - ✔✔biorationals
✔✔miscible liquids - ✔✔2+ mixable liquids, that remain mixed.
✔✔mycelium - ✔✔mass of filaments that forms the body of a fungus
✔✔miticide (aka) - ✔✔acaricide (aka)
✔✔mycoplasma - ✔✔microorganism with many virus-like properties, may cause plant
disease
✔✔nematodes - ✔✔microscopic, colorless, wormlike animals; saprophytes or parasites
✔✔neurotoxic - ✔✔ability of a substance to cause nervous disorders
✔✔nonpersistent pesticide - ✔✔doesn't remain active in environ for more than 1
growing season.
ANSWERS 2025/2026 ALL RATED A+
✔✔detoxify - ✔✔render poisonous chemical harmless
✔✔dispersing agent - ✔✔adjuvant that facilitates mixing and suspension of pesticide
formulation in water
✔✔dept of labor and industries - ✔✔DLI
✔✔dormant spray - ✔✔pesticide application shortly prior to resumption of plant growth
✔✔dose - ✔✔quantity of pesticide applied to a given area
✔✔emulsifier - ✔✔chemical which aids suspension of one liquid in another
✔✔EPA establishment number - ✔✔EPA-assigned number for each pesticide factory
✔✔EPA registration number - ✔✔EPA-assigned number for a product, on all labels
✔✔fetotoxic - ✔✔ability to harm fetus, not necessarily deformities
✔✔field scout - ✔✔person who samples fields for pests
✔✔Federal Insecticide, Fungicide, and Rodenticide Act - ✔✔FIFRA
✔✔forecasting - ✔✔prediction of pest incidence, based on weather, host, and pathogen
characteristics
✔✔formulation - ✔✔pesticide product as purchased
✔✔fungistatic agent - ✔✔prevents germination of fungus spores or mycelium growth.
Doesn't kill fungus.
✔✔hemotoxic - ✔✔causes blood disorders
✔✔illegal residue - ✔✔pesticide remaining on crop above allowed level, or prohibited
pesticide at any level
✔✔incompatible - ✔✔2 or more materials which cannot be mixed or used together
✔✔inoculum - ✔✔portion of the pathogen that can cause disease in the host
, ✔✔integrated pest management - ✔✔use of all suitable pest control methods to keep
pest populations below economic injury. Cultural practices, biological/physical/genetic
control, selective pesticides
✔✔label - ✔✔all printed material attached to or part of a pesticide container
✔✔labeling - ✔✔supplemental pesticide info which complements the label, not
necessarily attached.
✔✔LC50 - ✔✔concentration of pesticide, usually in air or water, that kills half a test
population. Usu expr in ppm
✔✔LD50 - ✔✔dose or amt of pesticide that kills half a test population when eaten, or
absorbed through skin. (mg/kg)
✔✔leaching - ✔✔movement of substance through soil with water
✔✔metabolite - ✔✔compound derived from changes in active ingredient through
reactions.
✔✔microbial degradation - ✔✔breakdown of chemical by microorgs
✔✔microbial pesticide - ✔✔microbes used to control pests.
✔✔biorationals - ✔✔microbial pesticides
✔✔microbial pesticide (aka) - ✔✔biorationals
✔✔miscible liquids - ✔✔2+ mixable liquids, that remain mixed.
✔✔mycelium - ✔✔mass of filaments that forms the body of a fungus
✔✔miticide (aka) - ✔✔acaricide (aka)
✔✔mycoplasma - ✔✔microorganism with many virus-like properties, may cause plant
disease
✔✔nematodes - ✔✔microscopic, colorless, wormlike animals; saprophytes or parasites
✔✔neurotoxic - ✔✔ability of a substance to cause nervous disorders
✔✔nonpersistent pesticide - ✔✔doesn't remain active in environ for more than 1
growing season.
