Illinois Field Crop Applicators Test (Actual 2025/2026)
Questions and verified Answers
lower - ----Answers___Should you use a higher or lower
labeled rate of a soil applied herbicide when the following
factors are observed:
1. soil texture is high in sand
2. organic matter is low %
3. herbicide is tank mix (not alone)
4. crop residue soil cover is low
higher - ----Answers___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 - ----Answers___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 - ----Answers___Treflan, Command, canopy,
scepter, and pursuit are all herbicides prone to carryover that
are used in what crop?
Corn - ----Answers___Atrazine, princep, exceed, lumax/lexer
are all herbicides prone to carryover that are used in what
crop?
True - ----Answers___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 - ----Answers___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 - ----Answers___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 - ----Answers___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 - ----Answers___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 - ----Answers___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
Questions and verified Answers
lower - ----Answers___Should you use a higher or lower
labeled rate of a soil applied herbicide when the following
factors are observed:
1. soil texture is high in sand
2. organic matter is low %
3. herbicide is tank mix (not alone)
4. crop residue soil cover is low
higher - ----Answers___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 - ----Answers___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 - ----Answers___Treflan, Command, canopy,
scepter, and pursuit are all herbicides prone to carryover that
are used in what crop?
Corn - ----Answers___Atrazine, princep, exceed, lumax/lexer
are all herbicides prone to carryover that are used in what
crop?
True - ----Answers___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 - ----Answers___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 - ----Answers___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 - ----Answers___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 - ----Answers___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 - ----Answers___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
