Herbicide Application and Weed Management
Principles Verified Quizzes + Top-Scoring
Assignments | A+ Guaranteed
Residual herbicides - Herbicides that remain in the soil and affect plant growth over time.
Structural reason for herbicide tolerance - Chitin layer on leaves and stems.
Chemical or application factor affecting herbicide susceptibility - Addition of adjuvants.
Phenoxy-type herbicides - Atrazine, simazine, Basagran.
Soil-applied herbicides requiring higher rates - Due to chemical degradation.
Susceptible to 2,4-D drift - Kentucky bluegrass.
Weed resistant to atrazine - Most likely resistant to simazine.
Calibration area for backpack sprayer - 20 feet by 25 feet.
Sprayer output per 1,000 square feet - 60 oz per 1,000 sq ft.
Label application rate for product - 1 quart of product per acre.
Product needed for 30,000 square feet - 22 ounces.
Nozzle to avoid with emulsifiable concentrate - Aluminum.
Application rate - The amount of product applied per area.
Leaf angle or size - Factors affecting herbicide effectiveness.
Photodegradation - Breakdown of herbicides by sunlight.
Soil adsorption - The process by which herbicides bind to soil particles.
Leaching - The process by which herbicides are washed away by water.
Wax layer on leaves - A structural feature that can affect herbicide absorption.
Exoskeleton - A structural feature of some plants that can contribute to herbicide
tolerance.
Diquat - A herbicide that may be compared with atrazine for resistance.
, Glyphosate - A herbicide that may be compared with atrazine for resistance.
2,4-D - A herbicide that can drift and affect susceptible plants.
Pampas grass - A plant that may be affected by 2,4-D drift.
Calibration area - The calibration area is 20 feet by 25 feet.
Sprayer output per 1,000 square feet - 60 ounces of spray covers the calibration area,
resulting in 120 oz per 1,000 sq ft.
Label application rate - The label application rate is 1 quart of product per acre.
Product needed for 30,000 square feet - You need 11.0 pints of product to treat 30,000
square feet.
Maximum amount of CONVEG T&O Herbicide - The maximum amount of CONVEG T&O
Herbicide you can broadcast to control 6-inch tall quack grass is 0.4 pound.
Weeds competition - Weeds compete with landscape plants and turf for nutrients, light,
and water.
Violation of pesticide law - Spraying a pest not listed on the label is considered a violation
of pesticide law.
Area of rectangle - Rectangle area = length x width.
Area of circle - Circle area = πr² (π = 3.14).
One acre - One acre = 43,560 square feet.
Characteristic of grasses - Net-like veins in leaves are only characteristic of grasses.
Weedy species invasion - The most common way weedy species invade urban landscapes
is by moving with contaminated equipment, seed, and mulch.
Perennial weeds persistence - Perennial weeds are the most persistent and difficult to
control because they live for more than two years and may live almost indefinitely.
Destruction of topgrowth - Destroying the topgrowth of perennial weeds on a one-time
basis normally kills the plant if conducted before root tubers are formed.
Mowing height impact - Mowing height can have a significant impact on the health and
vigor of turfgrasses.
Principles Verified Quizzes + Top-Scoring
Assignments | A+ Guaranteed
Residual herbicides - Herbicides that remain in the soil and affect plant growth over time.
Structural reason for herbicide tolerance - Chitin layer on leaves and stems.
Chemical or application factor affecting herbicide susceptibility - Addition of adjuvants.
Phenoxy-type herbicides - Atrazine, simazine, Basagran.
Soil-applied herbicides requiring higher rates - Due to chemical degradation.
Susceptible to 2,4-D drift - Kentucky bluegrass.
Weed resistant to atrazine - Most likely resistant to simazine.
Calibration area for backpack sprayer - 20 feet by 25 feet.
Sprayer output per 1,000 square feet - 60 oz per 1,000 sq ft.
Label application rate for product - 1 quart of product per acre.
Product needed for 30,000 square feet - 22 ounces.
Nozzle to avoid with emulsifiable concentrate - Aluminum.
Application rate - The amount of product applied per area.
Leaf angle or size - Factors affecting herbicide effectiveness.
Photodegradation - Breakdown of herbicides by sunlight.
Soil adsorption - The process by which herbicides bind to soil particles.
Leaching - The process by which herbicides are washed away by water.
Wax layer on leaves - A structural feature that can affect herbicide absorption.
Exoskeleton - A structural feature of some plants that can contribute to herbicide
tolerance.
Diquat - A herbicide that may be compared with atrazine for resistance.
, Glyphosate - A herbicide that may be compared with atrazine for resistance.
2,4-D - A herbicide that can drift and affect susceptible plants.
Pampas grass - A plant that may be affected by 2,4-D drift.
Calibration area - The calibration area is 20 feet by 25 feet.
Sprayer output per 1,000 square feet - 60 ounces of spray covers the calibration area,
resulting in 120 oz per 1,000 sq ft.
Label application rate - The label application rate is 1 quart of product per acre.
Product needed for 30,000 square feet - You need 11.0 pints of product to treat 30,000
square feet.
Maximum amount of CONVEG T&O Herbicide - The maximum amount of CONVEG T&O
Herbicide you can broadcast to control 6-inch tall quack grass is 0.4 pound.
Weeds competition - Weeds compete with landscape plants and turf for nutrients, light,
and water.
Violation of pesticide law - Spraying a pest not listed on the label is considered a violation
of pesticide law.
Area of rectangle - Rectangle area = length x width.
Area of circle - Circle area = πr² (π = 3.14).
One acre - One acre = 43,560 square feet.
Characteristic of grasses - Net-like veins in leaves are only characteristic of grasses.
Weedy species invasion - The most common way weedy species invade urban landscapes
is by moving with contaminated equipment, seed, and mulch.
Perennial weeds persistence - Perennial weeds are the most persistent and difficult to
control because they live for more than two years and may live almost indefinitely.
Destruction of topgrowth - Destroying the topgrowth of perennial weeds on a one-time
basis normally kills the plant if conducted before root tubers are formed.
Mowing height impact - Mowing height can have a significant impact on the health and
vigor of turfgrasses.
