IOWA APPLICATOR 11F FINAL PAPER 2025/2026
QUESTIONS WITH ANSWERS GRADED A+
✔✔Economic threshold - ✔✔Primarily used in agricultural and ornamental pest control.
Pest population density (# of pests per unit of area) at which control measures are
needed to prevent the pests from reaching the economic injury level.
✔✔Economic injury level - ✔✔Pest population density that causes losses equal to the
cost of control measures.
✔✔Aesthetic threshold - ✔✔Damage level that is unacceptable to the viewer
✔✔Action threshold - ✔✔Pest level at which some type of pest management action
should be taken.
✔✔Natural enemies - ✔✔Predators pathogens and parasites that attack pest species
✔✔Biological control - ✔✔Using natural enemies to control or suppress pests
✔✔Mechanical control - ✔✔Use of machines devices and other physical methods to
control pests (traps screens barriers fences and nets) (plows disks and bed
conditioners)
✔✔Cultural control - ✔✔Designed to alter the environment the condition of the host
plant or site or the behavior of the pest to prevent or suppress infestation (cultural and
sanitation) cultural: irrigation, mowing, pruning crop rotation trap crops. Sanitation:
elimination food water shelter or other necessities important to the pests survival
(keeping field borders free of pests and draining standing water).
✔✔Physical/environmental modification - ✔✔(Lowering humidity of stored grains and
other food products reduces damage from mold and some insects, refrigeration and
lowered temperatures can kills insects or disrupt their feeding and life cycles, increase
the air movement)
✔✔Physical control - ✔✔Measures specifically taken to kill the pest directly or indirectly
by making the environment unsuitable for pest entry dispersal survival or reproduction
✔✔Host resistance or genetic control - ✔✔Some plants and animals are bred or
selected to resist specific pest problems
✔✔Regulatory control - ✔✔Quarantine: regulations to prevent the entry of pests into
pest free areas. Eradication: the complete elimination of a pest from a site area or
geographic region
, ✔✔Chemical controls - ✔✔Pesticides that either synthesized or naturally derived
✔✔Pesticide - ✔✔Any material that is used to kill attract repel or interrupt the growth
and mating of pests or to regulate plant growth
✔✔Site of action - ✔✔Target protein within an organism where a pesticide binds and
acts
✔✔Mode do action - ✔✔A description of how a pesticide exerts a toxic effect on a target
pest and what specific system(s) are affected in the pest
✔✔Mode of action classes for herbicides - ✔✔Plant growth regulators, amino acid
synthesis inhibitors, photosynthesis inhibitors and pigment inhibitors
✔✔Mode of action classes of insecticides - ✔✔Acetylcholine set erase inhibitors,
sodium channel modulators, nicotinic acetylcholine receptor agonists, and chitin
biosynthesis inhibitors
✔✔Selectivity - ✔✔Affecting or controlling certain species while leaving others
unharmed
✔✔Non selective pesticides - ✔✔Pesticide that controls all related pests, non selective
herbicides are used where no plant growth is wanted (fumigants and non selective
herbicides)
✔✔Selective pesticides - ✔✔Effective against a limited group of pests without causing
harm to desirable organisms
✔✔Systemic pesticides - ✔✔Chemical that is absorbed and traps located within a plant
or animal
✔✔Translocated pesticide - ✔✔Pesticide that moves within a plant or animal from the
entry site.
✔✔Contact pesticides - ✔✔Pesticide that kills when it touches or is touched by a pest
✔✔Pesticide resistance - ✔✔Ability of an insect fungus weed rodent or other pests to
tolerate a pesticide that once controlled it.
✔✔Label - ✔✔All information printed on and attached to the pesticide container or
referred to on the label or accompanying literature
✔✔Labeling - ✔✔Pesticide label and all additional product information such as
brochures and fliers provided by the manufacturer and handouts provided by the dealer.
QUESTIONS WITH ANSWERS GRADED A+
✔✔Economic threshold - ✔✔Primarily used in agricultural and ornamental pest control.
Pest population density (# of pests per unit of area) at which control measures are
needed to prevent the pests from reaching the economic injury level.
✔✔Economic injury level - ✔✔Pest population density that causes losses equal to the
cost of control measures.
✔✔Aesthetic threshold - ✔✔Damage level that is unacceptable to the viewer
✔✔Action threshold - ✔✔Pest level at which some type of pest management action
should be taken.
✔✔Natural enemies - ✔✔Predators pathogens and parasites that attack pest species
✔✔Biological control - ✔✔Using natural enemies to control or suppress pests
✔✔Mechanical control - ✔✔Use of machines devices and other physical methods to
control pests (traps screens barriers fences and nets) (plows disks and bed
conditioners)
✔✔Cultural control - ✔✔Designed to alter the environment the condition of the host
plant or site or the behavior of the pest to prevent or suppress infestation (cultural and
sanitation) cultural: irrigation, mowing, pruning crop rotation trap crops. Sanitation:
elimination food water shelter or other necessities important to the pests survival
(keeping field borders free of pests and draining standing water).
✔✔Physical/environmental modification - ✔✔(Lowering humidity of stored grains and
other food products reduces damage from mold and some insects, refrigeration and
lowered temperatures can kills insects or disrupt their feeding and life cycles, increase
the air movement)
✔✔Physical control - ✔✔Measures specifically taken to kill the pest directly or indirectly
by making the environment unsuitable for pest entry dispersal survival or reproduction
✔✔Host resistance or genetic control - ✔✔Some plants and animals are bred or
selected to resist specific pest problems
✔✔Regulatory control - ✔✔Quarantine: regulations to prevent the entry of pests into
pest free areas. Eradication: the complete elimination of a pest from a site area or
geographic region
, ✔✔Chemical controls - ✔✔Pesticides that either synthesized or naturally derived
✔✔Pesticide - ✔✔Any material that is used to kill attract repel or interrupt the growth
and mating of pests or to regulate plant growth
✔✔Site of action - ✔✔Target protein within an organism where a pesticide binds and
acts
✔✔Mode do action - ✔✔A description of how a pesticide exerts a toxic effect on a target
pest and what specific system(s) are affected in the pest
✔✔Mode of action classes for herbicides - ✔✔Plant growth regulators, amino acid
synthesis inhibitors, photosynthesis inhibitors and pigment inhibitors
✔✔Mode of action classes of insecticides - ✔✔Acetylcholine set erase inhibitors,
sodium channel modulators, nicotinic acetylcholine receptor agonists, and chitin
biosynthesis inhibitors
✔✔Selectivity - ✔✔Affecting or controlling certain species while leaving others
unharmed
✔✔Non selective pesticides - ✔✔Pesticide that controls all related pests, non selective
herbicides are used where no plant growth is wanted (fumigants and non selective
herbicides)
✔✔Selective pesticides - ✔✔Effective against a limited group of pests without causing
harm to desirable organisms
✔✔Systemic pesticides - ✔✔Chemical that is absorbed and traps located within a plant
or animal
✔✔Translocated pesticide - ✔✔Pesticide that moves within a plant or animal from the
entry site.
✔✔Contact pesticides - ✔✔Pesticide that kills when it touches or is touched by a pest
✔✔Pesticide resistance - ✔✔Ability of an insect fungus weed rodent or other pests to
tolerate a pesticide that once controlled it.
✔✔Label - ✔✔All information printed on and attached to the pesticide container or
referred to on the label or accompanying literature
✔✔Labeling - ✔✔Pesticide label and all additional product information such as
brochures and fliers provided by the manufacturer and handouts provided by the dealer.
