8/21/26, 5:05 PM Illinois Pesticide Applicator Turfgrass | Quizlet
Name: Score:
20 Multiple choice questions
Term 1 of 20
Helminthosporium "Leaf, Crown, and Root Diseases"
white, powdery mildew on the upper leaf surfaces; no root damage
dark brown/purplish red leaf spots with tan centers; rhizomes and roots may be blackened and decayed
yellow rings with brown centers; stems are hollow and brittle
circular, orange-red spots with black centers; roots are healthy
Term 2 of 20
how often should you pH test?
Every 3-5 years
Every 6 months
Once every 10 years
Only when the grass turns yellow
https://quizlet.com/1115466366/test?answerTermSides=6&promptTermSides=6&questionCount=20&questionTypes=4&showImages=true 1/7
8/21/26, 5:05 PM Illinois Pesticide Applicator Turfgrass | Quizlet
Definition 3 of 20
summer annuals; oval papery sheath; at each node and node are swollen; heavily trafficked areas
prostrate knotweed
quackgrass
creeping bentgrass
bull thistle
Term 4 of 20
What is the one-third rule
Never mow the lawn when the grass is wet
Never remove more than one-third of the grass blade at mowing
Never remove more than one-third of the soil volume during aeration
Never apply more than one-third of the recommended fertilizer rate
Definition 5 of 20
cool season annual; leaf tips are boat shaped and rooting at lower nodes on creeping stems; occurs on wet compacted soils
annual bluegrass
bermudagrass
annual ryegrass
perennial ryegrass
https://quizlet.com/1115466366/test?answerTermSides=6&promptTermSides=6&questionCount=20&questionTypes=4&showImages=true 2/7
Name: Score:
20 Multiple choice questions
Term 1 of 20
Helminthosporium "Leaf, Crown, and Root Diseases"
white, powdery mildew on the upper leaf surfaces; no root damage
dark brown/purplish red leaf spots with tan centers; rhizomes and roots may be blackened and decayed
yellow rings with brown centers; stems are hollow and brittle
circular, orange-red spots with black centers; roots are healthy
Term 2 of 20
how often should you pH test?
Every 3-5 years
Every 6 months
Once every 10 years
Only when the grass turns yellow
https://quizlet.com/1115466366/test?answerTermSides=6&promptTermSides=6&questionCount=20&questionTypes=4&showImages=true 1/7
8/21/26, 5:05 PM Illinois Pesticide Applicator Turfgrass | Quizlet
Definition 3 of 20
summer annuals; oval papery sheath; at each node and node are swollen; heavily trafficked areas
prostrate knotweed
quackgrass
creeping bentgrass
bull thistle
Term 4 of 20
What is the one-third rule
Never mow the lawn when the grass is wet
Never remove more than one-third of the grass blade at mowing
Never remove more than one-third of the soil volume during aeration
Never apply more than one-third of the recommended fertilizer rate
Definition 5 of 20
cool season annual; leaf tips are boat shaped and rooting at lower nodes on creeping stems; occurs on wet compacted soils
annual bluegrass
bermudagrass
annual ryegrass
perennial ryegrass
https://quizlet.com/1115466366/test?answerTermSides=6&promptTermSides=6&questionCount=20&questionTypes=4&showImages=true 2/7
