Illinois Pesticide Applicator Rights-Of-
Way Questions and Answers 2026
First step in weed control - <CORRECT ANSWER >>identification of weed
Broadleaf weeds - <CORRECT ANSWER >>netted veins
Narrowleaf weeds (grasses) - <CORRECT ANSWER >>long, thin leaves with parallel veins
Areas preferred by annuals - <CORRECT ANSWER >>soil is disturbed or perennial plants are
spotty/poor
Areas preferred by winter annuals - <CORRECT ANSWER >>soil is disturbed in fall or left
exposed over winter
Areas preferred by biennials - <CORRECT ANSWER >>areas not mowed or disturbed
Areas preferred by perennials - <CORRECT ANSWER >>areas with minimal soil disturbance
Examples foxtail, crabgrass, common chickweed, henbit - <CORRECT ANSWER >>annuals weeds
Examples garlic mustard, wild carrot, bull thistle, common teasel - <CORRECT ANSWER
>>Biennial Weeds
Examples Johnsongrass, dandelion, Canada Thistle, honeysuckle - <CORRECT ANSWER
>>Perennial Weeds
Herbaceous perennial - <CORRECT ANSWER >>die in fall, but root systems overwinter
, Woody perennial - <CORRECT ANSWER >>persistent aboveground stems that remain each
season
Monocotyledons (monocots) - <CORRECT ANSWER >>parallel-veined leaves that are much
longer than they are wide; grasses or grasslike
Dicotyledons (dicots) - <CORRECT ANSWER >>netted-veins that are usually less elongated than
grass; broadleaves
Vegetative characteristics used to identify grass weeds - <CORRECT ANSWER >>collar region,
ligule, stem shape, nodes, presence of hair
Vegetative characteristics used to identify broadleaf weeds - <CORRECT ANSWER >>cotyledons,
leaves, flowers, fruits, roots
Noxious weeds - <CORRECT ANSWER >>control is required by law; common ragweed, giant
ragweed, marijuana, musk/Canada thistle
Exotic weeds - <CORRECT ANSWER >>cannot be sold/used without permit issued by govt;
Japanese honeysuckle, Chinese buckthorn, giant hogweed
Best weed control programs integrate - <CORRECT ANSWER >>cultural and chemical control
methods; Integrated Weed Management
Benefits of cultural control - <CORRECT ANSWER >>controls weeds indirectly, perennial grasses
prevent erosion, mulch/gravel helps keep weed pressure down
Disadvantages to biological control - <CORRECT ANSWER >>weed species specific and slow to
show results
Way Questions and Answers 2026
First step in weed control - <CORRECT ANSWER >>identification of weed
Broadleaf weeds - <CORRECT ANSWER >>netted veins
Narrowleaf weeds (grasses) - <CORRECT ANSWER >>long, thin leaves with parallel veins
Areas preferred by annuals - <CORRECT ANSWER >>soil is disturbed or perennial plants are
spotty/poor
Areas preferred by winter annuals - <CORRECT ANSWER >>soil is disturbed in fall or left
exposed over winter
Areas preferred by biennials - <CORRECT ANSWER >>areas not mowed or disturbed
Areas preferred by perennials - <CORRECT ANSWER >>areas with minimal soil disturbance
Examples foxtail, crabgrass, common chickweed, henbit - <CORRECT ANSWER >>annuals weeds
Examples garlic mustard, wild carrot, bull thistle, common teasel - <CORRECT ANSWER
>>Biennial Weeds
Examples Johnsongrass, dandelion, Canada Thistle, honeysuckle - <CORRECT ANSWER
>>Perennial Weeds
Herbaceous perennial - <CORRECT ANSWER >>die in fall, but root systems overwinter
, Woody perennial - <CORRECT ANSWER >>persistent aboveground stems that remain each
season
Monocotyledons (monocots) - <CORRECT ANSWER >>parallel-veined leaves that are much
longer than they are wide; grasses or grasslike
Dicotyledons (dicots) - <CORRECT ANSWER >>netted-veins that are usually less elongated than
grass; broadleaves
Vegetative characteristics used to identify grass weeds - <CORRECT ANSWER >>collar region,
ligule, stem shape, nodes, presence of hair
Vegetative characteristics used to identify broadleaf weeds - <CORRECT ANSWER >>cotyledons,
leaves, flowers, fruits, roots
Noxious weeds - <CORRECT ANSWER >>control is required by law; common ragweed, giant
ragweed, marijuana, musk/Canada thistle
Exotic weeds - <CORRECT ANSWER >>cannot be sold/used without permit issued by govt;
Japanese honeysuckle, Chinese buckthorn, giant hogweed
Best weed control programs integrate - <CORRECT ANSWER >>cultural and chemical control
methods; Integrated Weed Management
Benefits of cultural control - <CORRECT ANSWER >>controls weeds indirectly, perennial grasses
prevent erosion, mulch/gravel helps keep weed pressure down
Disadvantages to biological control - <CORRECT ANSWER >>weed species specific and slow to
show results
