ILLINOIS FIELD CROPS APPLICATOR ACTUAL FINAL PAPER
2025/2026 QUESTIONS WITH ANSWERS GRADED A+
✔✔higher - ✔✔Do the listed factors lead to a higher or lower carryover potential for
herbicides to the next crop?
1. herbicide persistence (half-life) is long
2.Herbicide application was done later in the season
3. precipitation totals are low
4. temperature is cool
5. rotational crop time is short
✔✔lower - ✔✔Do the listed factors lead to a higher or lower carryover potential for
herbicides to the next crop?
1. herbicide persistence (half-life) is short
2.Herbicide application was done early in the season
3. precipitation totals are high
4. temperature is warm
5. rotational crop time is long
✔✔soybeans - ✔✔Treflan, Command, canopy, scepter, and pursuit are all herbicides
prone to carryover that are used in what crop?
✔✔Corn - ✔✔Atrazine, princep, exceed, lumax/lexer are all herbicides prone to
carryover that are used in what crop?
✔✔True - ✔✔True or false: herbicide combinations (pre-mix, tank-mix, etc.) are used to:
-broaden the spectrum of weeds controled
- reduce or minimize carryover, crop injury, and resistance in weeds.
✔✔mixing or combining herbicides - ✔✔Applicators are liable and should understand
that each herbicide must be labeled for the use and all label requirements met when
doing what activity?
✔✔higher - ✔✔Do the listed factors mean you should apply a higher or lower rate of
herbicides for postemergence?
1. weed size is large
2. weed density is high
3. herbicide is alone and not a mix
4. adjuvants are not used
5. the conditions are dry.
✔✔lower rate - ✔✔Do the listed factors mean you should apply a higher or lower rate of
herbicides for postemergence?
1. weed size is small
2. weed density is low
, 3. herbicide mixed not alone
4. adjuvants are used
5. the conditions are so that weeds are actively growing
✔✔higher - ✔✔Do the listed factors lead to higher or lower herbicide activity?
1. rainfall 2-6 hours after the application
2. temperature is hot
3. soil moisture is adequate
4. relative humidity is high
✔✔lower - ✔✔Do the listed factors lead to higher or lower herbicide activity?
1. rainfall less than 30 minutes after the application
2. temperature is cool
3. soil moisture is poor
4. relative humidity is low
✔✔adjuvants - ✔✔What is added to a postemergence herbicide to increase the
following factors?
-spray coverage
-herbicide effectiveness
-spray potential
-droplet size which decreases drift
✔✔particle drift - ✔✔Glysophate and paraquat are often involved in this type of drift/ off
target movement.
✔✔vapor drift - ✔✔Dicamba, clomazone, and 2-4-D are commonly involved with this
type of drift.
✔✔mode - ✔✔_____of action: describes the the herbicide inhibits plant growth
✔✔site - ✔✔______ of action: refers to the location on the plant the herbicide acts
✔✔growth regulator - ✔✔The following symptoms describe what type of herbicide:
1. twisting
2. cupping of leaves
3. corn has rolled leaves
4. stalk bending
✔✔Photosynthesis inhibitors - ✔✔The following symptoms describe what type of
herbicide:
1. yellowing of the leaves
2. interveinal chlorosis
3. chlorophil are killed
2025/2026 QUESTIONS WITH ANSWERS GRADED A+
✔✔higher - ✔✔Do the listed factors lead to a higher or lower carryover potential for
herbicides to the next crop?
1. herbicide persistence (half-life) is long
2.Herbicide application was done later in the season
3. precipitation totals are low
4. temperature is cool
5. rotational crop time is short
✔✔lower - ✔✔Do the listed factors lead to a higher or lower carryover potential for
herbicides to the next crop?
1. herbicide persistence (half-life) is short
2.Herbicide application was done early in the season
3. precipitation totals are high
4. temperature is warm
5. rotational crop time is long
✔✔soybeans - ✔✔Treflan, Command, canopy, scepter, and pursuit are all herbicides
prone to carryover that are used in what crop?
✔✔Corn - ✔✔Atrazine, princep, exceed, lumax/lexer are all herbicides prone to
carryover that are used in what crop?
✔✔True - ✔✔True or false: herbicide combinations (pre-mix, tank-mix, etc.) are used to:
-broaden the spectrum of weeds controled
- reduce or minimize carryover, crop injury, and resistance in weeds.
✔✔mixing or combining herbicides - ✔✔Applicators are liable and should understand
that each herbicide must be labeled for the use and all label requirements met when
doing what activity?
✔✔higher - ✔✔Do the listed factors mean you should apply a higher or lower rate of
herbicides for postemergence?
1. weed size is large
2. weed density is high
3. herbicide is alone and not a mix
4. adjuvants are not used
5. the conditions are dry.
✔✔lower rate - ✔✔Do the listed factors mean you should apply a higher or lower rate of
herbicides for postemergence?
1. weed size is small
2. weed density is low
, 3. herbicide mixed not alone
4. adjuvants are used
5. the conditions are so that weeds are actively growing
✔✔higher - ✔✔Do the listed factors lead to higher or lower herbicide activity?
1. rainfall 2-6 hours after the application
2. temperature is hot
3. soil moisture is adequate
4. relative humidity is high
✔✔lower - ✔✔Do the listed factors lead to higher or lower herbicide activity?
1. rainfall less than 30 minutes after the application
2. temperature is cool
3. soil moisture is poor
4. relative humidity is low
✔✔adjuvants - ✔✔What is added to a postemergence herbicide to increase the
following factors?
-spray coverage
-herbicide effectiveness
-spray potential
-droplet size which decreases drift
✔✔particle drift - ✔✔Glysophate and paraquat are often involved in this type of drift/ off
target movement.
✔✔vapor drift - ✔✔Dicamba, clomazone, and 2-4-D are commonly involved with this
type of drift.
✔✔mode - ✔✔_____of action: describes the the herbicide inhibits plant growth
✔✔site - ✔✔______ of action: refers to the location on the plant the herbicide acts
✔✔growth regulator - ✔✔The following symptoms describe what type of herbicide:
1. twisting
2. cupping of leaves
3. corn has rolled leaves
4. stalk bending
✔✔Photosynthesis inhibitors - ✔✔The following symptoms describe what type of
herbicide:
1. yellowing of the leaves
2. interveinal chlorosis
3. chlorophil are killed
