Illinois Field Crop Applicators Test Actual

Illinois Field Crop Applicators Test (Actual / ) 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:

• soil texture is high in sand
• organic matter is low %
• herbicide is tank mix (not alone)
• 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?

• herbicide persistence (half-life) is long

2.Herbicide application was done later in the season

• precipitation totals are low
• temperature is cool
• 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?

• herbicide persistence (half-life) is short

2.Herbicide application was done early in the season

• precipitation totals are high
• temperature is warm 1 / 3

• 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?

• weed size is large
• weed density is high
• herbicide is alone and not a mix
• adjuvants are not used 2 / 3

• the conditions are dry.

lower rate - ----Answers___Do the listed factors mean you should apply a higher or lower rate of herbicides for postemergence?

• weed size is small
• weed density is low
• herbicide mixed not alone
• adjuvants are used
• the conditions are so that weeds are actively growing

higher - ----Answers___Do the listed factors lead to higher or lower herbicide activity?

• rainfall 2-6 hours after the application
• temperature is hot
• soil moisture is adequate
• relative humidity is high

lower - ----Answers___Do the listed factors lead to higher or lower herbicide activity?

• rainfall less than 30 minutes after the application
• temperature is cool
• soil moisture is poor
• relative humidity is low
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