Test 7A || Exam Questions & Answers
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2026–2027
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, ABSORPTION The movement of a chemical into
plants, animals (including humans), and/or microorganisms.
ACARICIDE A pesticide used to control mites and
ticks. Amiticide is an acaricide.
ACTIVE INGREDIENT The chemical or chemicals in a
pesticide responsible for killing, poisoning, or repelling
the pest. Listed separately in the ingredient statement.
ACUTE TOXICITY The capacity of a pesticide to cause
injury within 24 hours following exposure. LD50 and LC50
are common indicators of the degree of acute toxicity.
(See also chronic toxicity).
ADJUVANT A substance added to a pesticide to
improve its effectiveness or safety. Same as additive.
Examples: penetrants, spreader-stickers, and wetting
agents.
ADSORPTION The process by which chemicals are
held or bound to a surface by physical or chemical attraction.
Clay and high organic soils tend to adsorb pesticides.
AGGREGATION PHEROMONE See pheromone.
AEROSOL Amaterial stored in a container under pressure.
Fine droplets are produced when the material dissolved
in a liquid carrier is released into the air from the
pressurized container.
ALGAE Relatively simple plants that contain chlorophyll
and are photosynthetic.
ALGICIDE Apesticide used to kill or inhibit algae.
ANTI-SIPHONING DEVICE A device attached to the
filling hose that prevents backflow or back-siphoning
from a spray tank into a water source.
ANTICOAGULANT A chemical that prevents normal
blood clotting—the active ingredient in some rodenticides.
ANTIDOTE A treatment used to counteract the effects
of pesticide poisoning or some other poison in the body.
ARACHNID A wingless arthropod with two body
regions and four pairs of jointed legs. Spiders, ticks, and
mites are in the class Arachnida.
ARTHROPOD An invertebrate animal characterized
by a jointed body and limbs and usually a hard body covering
that is molted at intervals. For example, insects,
mites, and crayfish are in the phylum Arthropoda.