Illinois Field Crop Applicators Test/102 Questions and
Answers/A+ Graded
various, economical, environmentally sound, socially acceptable - ✔✔ANSW✔✔..An
integrated pest management program is based upon what factors?
Economic threshhold - ✔✔ANSW✔✔..What is the number of pests that should be
controlled to prevent economic damage from occurring?
Economic Injury level - ✔✔ANSW✔✔..Number of pests, costs of various treatments,
expected yield, and expected grain value are all factors to determine....
Do not treat, but scout again later. - ✔✔ANSW✔✔..What should be done if scouting
detects an important pest, but its numbers do not reach the economic threshold?
random - ✔✔ANSW✔✔..When scouting, where in the field should you sample?
Cultural, Mechanical, Biological, Chemical - ✔✔ANSW✔✔..What are the 4 types of
control measures used in an IPM?
Larvae - ✔✔ANSW✔✔..At what stage in the life-cycle of a Corn rootworm does it prune
and tunnel through the roots causing stalk lodging?
Adult - ✔✔ANSW✔✔..At what life-cycle stage does a corn rootworm cause ear damage
by feeding on the silks?
chemical - ✔✔ANSW✔✔..The following methods of controlling insect pests are
examples of what type of method?
-rescue treatment of corn for black cutworm
-banding insecticide over corn row at planting time to control corn root-worm
broadleaf - ✔✔ANSW✔✔..these are 4 main characteristics used to identify what type of
weed seedlings?
1. cotyledons
2. true leaves
3. arrangement of true leaves
4. leaf petioles
, propagules - ✔✔ANSW✔✔..These 3 types of underground vegetative reproductive
structures are called what?
- rhizomes
-budding roots
-tubers/ bulbs
weeds - ✔✔ANSW✔✔..Name the pest that competes with crops for: light, nutrients,
moisture, and space.
EPP - ✔✔ANSW✔✔..abbreviation for: Early Preplant applications
PPI - ✔✔ANSW✔✔..abbreviation for: Preplant incorporated applications
PRE - ✔✔ANSW✔✔..abbreviation for: preplant or preemergence applications
POST - ✔✔ANSW✔✔..abbreciation for: post emergence applications
seedling - ✔✔ANSW✔✔..What stage in the lifecycle are annuals most susceptible to
herbicicdes applied postemergence?
seedling, rosette stage, prior to bolting - ✔✔ANSW✔✔..What stage in the lifecycle are
biennials most susceptible to herbicicdes applied postemergence?
seedling, bud to bloom, and fall- prior to dormancy - ✔✔ANSW✔✔..What stage in the
lifecycle are perennials most susceptible to herbicicdes applied postemergence?
mechanical or precipitation - ✔✔ANSW✔✔..All soil applied herbicides need to move into
the soil which can be accomplished by what means?
2 inches - ✔✔ANSW✔✔..Most weed seeds germinate in the top how many inches of
the top soil?
higher - ✔✔ANSW✔✔..Should you use a higher or lower labeled rate of a soil applied
herbicide when the following factors are observed:
1. soil texture is high in clay
2. organic matter is high %
3. herbicide alone (not tank mix)
4. crop residue soil cover is high
lower - ✔✔ANSW✔✔..Should you use a higher or lower labeled rate of a soil applied
herbicide when the following factors are observed:
1. soil texture is high in sand
2. organic matter is low %
3. herbicide is tank mix (not alone)
Answers/A+ Graded
various, economical, environmentally sound, socially acceptable - ✔✔ANSW✔✔..An
integrated pest management program is based upon what factors?
Economic threshhold - ✔✔ANSW✔✔..What is the number of pests that should be
controlled to prevent economic damage from occurring?
Economic Injury level - ✔✔ANSW✔✔..Number of pests, costs of various treatments,
expected yield, and expected grain value are all factors to determine....
Do not treat, but scout again later. - ✔✔ANSW✔✔..What should be done if scouting
detects an important pest, but its numbers do not reach the economic threshold?
random - ✔✔ANSW✔✔..When scouting, where in the field should you sample?
Cultural, Mechanical, Biological, Chemical - ✔✔ANSW✔✔..What are the 4 types of
control measures used in an IPM?
Larvae - ✔✔ANSW✔✔..At what stage in the life-cycle of a Corn rootworm does it prune
and tunnel through the roots causing stalk lodging?
Adult - ✔✔ANSW✔✔..At what life-cycle stage does a corn rootworm cause ear damage
by feeding on the silks?
chemical - ✔✔ANSW✔✔..The following methods of controlling insect pests are
examples of what type of method?
-rescue treatment of corn for black cutworm
-banding insecticide over corn row at planting time to control corn root-worm
broadleaf - ✔✔ANSW✔✔..these are 4 main characteristics used to identify what type of
weed seedlings?
1. cotyledons
2. true leaves
3. arrangement of true leaves
4. leaf petioles
, propagules - ✔✔ANSW✔✔..These 3 types of underground vegetative reproductive
structures are called what?
- rhizomes
-budding roots
-tubers/ bulbs
weeds - ✔✔ANSW✔✔..Name the pest that competes with crops for: light, nutrients,
moisture, and space.
EPP - ✔✔ANSW✔✔..abbreviation for: Early Preplant applications
PPI - ✔✔ANSW✔✔..abbreviation for: Preplant incorporated applications
PRE - ✔✔ANSW✔✔..abbreviation for: preplant or preemergence applications
POST - ✔✔ANSW✔✔..abbreciation for: post emergence applications
seedling - ✔✔ANSW✔✔..What stage in the lifecycle are annuals most susceptible to
herbicicdes applied postemergence?
seedling, rosette stage, prior to bolting - ✔✔ANSW✔✔..What stage in the lifecycle are
biennials most susceptible to herbicicdes applied postemergence?
seedling, bud to bloom, and fall- prior to dormancy - ✔✔ANSW✔✔..What stage in the
lifecycle are perennials most susceptible to herbicicdes applied postemergence?
mechanical or precipitation - ✔✔ANSW✔✔..All soil applied herbicides need to move into
the soil which can be accomplished by what means?
2 inches - ✔✔ANSW✔✔..Most weed seeds germinate in the top how many inches of
the top soil?
higher - ✔✔ANSW✔✔..Should you use a higher or lower labeled rate of a soil applied
herbicide when the following factors are observed:
1. soil texture is high in clay
2. organic matter is high %
3. herbicide alone (not tank mix)
4. crop residue soil cover is high
lower - ✔✔ANSW✔✔..Should you use a higher or lower labeled rate of a soil applied
herbicide when the following factors are observed:
1. soil texture is high in sand
2. organic matter is low %
3. herbicide is tank mix (not alone)
