IOWA 3OT PESTICIDE MANUAL
2026/2027 ACTUAL QUESTIONS WITH
VERIFIED ANSWERS.
Summarize the two strategies involved in insecticide
management of white grubs - correct answer-Preventative
Treat the whole lawn every year whether or not they are
present
Curative
Scouting late july to early august and then applying insecticide
common example of soil-inhabiting insect pests of iowa
turfgrass - correct answer-japanese beetle, black turfgrass
ataenius, may/june beetle
common example of stem and leaf feeding insect pest of iowa
turfgrass - correct answer-cutworms, bluegrass billbugs, sod
webworms
,Grasses - correct answer-Jointed, hollow stems. Leaf blades
have parallel veins and are several times longer than they are
wide.
Broadleaf weeds - correct answer-Often have showy flowers
and the leaves have a network of small veins originating from a
principal vein that divides the leaf in half
Sedge - correct answer-Grass-like plants with three-cornered
stems that bear leaves extending in three directions. Not true
grasses or true broadleaves.
Annual - correct answer-Begins growth each year from a seed,
produces flowers, and dies in less than a year.
Most germinate in the spring and complete life cycle in summer.
Killed with the first frost
Biennial - correct answer-Requires two years to complete its life
cycle
First year the plant forms a rosette and develops a large root
system
Second year plant produces flowers and then dies.
,Control methods are best during first year
Perennial - correct answer-Plants that live for more than two
years
May die back to ground level during winter and then come back
following spring
common annual grass weed in iowa - correct answer-crabgrass
and knotweed
common perennial grass weed in iowa turfgrass setting -
correct answer-coarse bluegrass
common hard to control weed in turfgrass setting in iowa -
correct answer-common blue violet, ground ivy, quackgrass
common biennial broadleaf weed in turfgrass setting in iowa -
correct answer-bull thistle, common mallow
, common perennial broadleaf weed in turfgrass setting in iowa -
correct answer-dandelion, purslane, common blue violet
common sedge weed in turfgrass setting in iowa - correct
answer-yellow nutsedge
common winter annual weed in turfgrass setting in iowa -
correct answer-downy brome, common chickweed
common summer annual weed in turfgrass setting in iowa -
correct answer-smooth crabgrass, yellow foxtail
other weeds in turfgrass setting in iowa - correct answer-algae,
silvery thread moss, wild garlic
Discuss the challenges of using preemergence herbicides for
controlling annual grasses in turfgrass sites - correct answer-
Preemergence herbicides must be watered in or rained on, but
too much or too little water can reduce their effectiveness.
Difficult because of their similarity to desirable turfgrass
species.
2026/2027 ACTUAL QUESTIONS WITH
VERIFIED ANSWERS.
Summarize the two strategies involved in insecticide
management of white grubs - correct answer-Preventative
Treat the whole lawn every year whether or not they are
present
Curative
Scouting late july to early august and then applying insecticide
common example of soil-inhabiting insect pests of iowa
turfgrass - correct answer-japanese beetle, black turfgrass
ataenius, may/june beetle
common example of stem and leaf feeding insect pest of iowa
turfgrass - correct answer-cutworms, bluegrass billbugs, sod
webworms
,Grasses - correct answer-Jointed, hollow stems. Leaf blades
have parallel veins and are several times longer than they are
wide.
Broadleaf weeds - correct answer-Often have showy flowers
and the leaves have a network of small veins originating from a
principal vein that divides the leaf in half
Sedge - correct answer-Grass-like plants with three-cornered
stems that bear leaves extending in three directions. Not true
grasses or true broadleaves.
Annual - correct answer-Begins growth each year from a seed,
produces flowers, and dies in less than a year.
Most germinate in the spring and complete life cycle in summer.
Killed with the first frost
Biennial - correct answer-Requires two years to complete its life
cycle
First year the plant forms a rosette and develops a large root
system
Second year plant produces flowers and then dies.
,Control methods are best during first year
Perennial - correct answer-Plants that live for more than two
years
May die back to ground level during winter and then come back
following spring
common annual grass weed in iowa - correct answer-crabgrass
and knotweed
common perennial grass weed in iowa turfgrass setting -
correct answer-coarse bluegrass
common hard to control weed in turfgrass setting in iowa -
correct answer-common blue violet, ground ivy, quackgrass
common biennial broadleaf weed in turfgrass setting in iowa -
correct answer-bull thistle, common mallow
, common perennial broadleaf weed in turfgrass setting in iowa -
correct answer-dandelion, purslane, common blue violet
common sedge weed in turfgrass setting in iowa - correct
answer-yellow nutsedge
common winter annual weed in turfgrass setting in iowa -
correct answer-downy brome, common chickweed
common summer annual weed in turfgrass setting in iowa -
correct answer-smooth crabgrass, yellow foxtail
other weeds in turfgrass setting in iowa - correct answer-algae,
silvery thread moss, wild garlic
Discuss the challenges of using preemergence herbicides for
controlling annual grasses in turfgrass sites - correct answer-
Preemergence herbicides must be watered in or rained on, but
too much or too little water can reduce their effectiveness.
Difficult because of their similarity to desirable turfgrass
species.
