Iowa Commercial Pesticide Applicator
Category 1A Exam Questions With Correct
Answers
What |is |the |greatest |hazard |when |applying |most |herbicides? |- |CORRECT |ANSWER✔✔-Injury |to
|nontarget |plants
Name |some |herbicides |which |are |very |effective |against |germinating |weeds |but |less |effective |
on |established |weeds. |- |CORRECT |ANSWER✔✔-Frontier, |Lasso, |and |Dual
What |soil |conditions |reduce |the |activity |of |many |herbicides |and |require |increased |rates |for |
adequate |weed |control? |- |CORRECT |ANSWER✔✔-Higher |levels |of |soil |organic |matter |or |clay
Two |herbicides |which |are |more |active |on |soils |with |a |pH |above |7.5 |and |can |injure |soybeans |- |
CORRECT |ANSWER✔✔-Sencor |and |Lexone
Where |are |high |pH |soils |most |common |in |Iowa? |- |CORRECT |ANSWER✔✔-Next |to |limestone |
and |gravel |roads
Two |herbicides |that |are |more |persistent |and |likely |to |carryover |residues. |- |CORRECT |
ANSWER✔✔-Atrazine |and |chlorimuron
What |factors |can |increase |chances |of |herbicide |carryover? |- |CORRECT |ANSWER✔✔-Dry |
weather, |high |rates, |late |application, |and |in |the |case |of |some |herbicides, |high |soil |pH
, Can |additive |injury |occur |when |applying |Sencor/Lexone |on |soybeans |in |fields |with |atrazine |
carryover |residues? |- |CORRECT |ANSWER✔✔-Yes
What |do |preemergence |herbicides |rely |on |to |move |the |herbicide |into |the |weed |seed |
germination |zone |(top |1/2-1 |inch) |of |soil? |- |CORRECT |ANSWER✔✔-Rainfall |or |irrigation
What |tillage |tools |will |improve |weed |control |when |rainfall |does |not |occur |soon |after |herbicide
|application, |and |weeds |begin |emerging? |- |CORRECT |ANSWER✔✔-Rotary |Hoe |and |Harrow
Name |3 |herbicides |which |must |be |incorporated |to |prevent |evaporation |loss. |- |CORRECT |
ANSWER✔✔-Sultan+, |Eradicane, |Eradicane |Extra
Define |photodecomposition |- |CORRECT |ANSWER✔✔-Chemical |breakdown |caused |by |exposure
|to |light
Name |two |herbicides |that |must |be |incorporated |to |prevent |photodecomposition. |- |CORRECT |
ANSWER✔✔-Treflan, |Sonalan
Why |are |Basagran, |Blazer, |Buctril, |Poast |Plus, |and |Fusilade |2000 |only |applied |postemergence?
|- |CORRECT |ANSWER✔✔-They |have |little |or |no |soil |activity
Are |Roundup |and |Gramoxone |Extra |selective |or |nonselective |herbicides? |- |CORRECT |
ANSWER✔✔-Nonselective
Are |Blazer, |Basagran, |Buctril, |and |Gramoxone |Extra |contact |herbicides |or |translocated |
herbicides? |- |CORRECT |ANSWER✔✔-Contact |herbicides
Define |translocated |herbicides |- |CORRECT |ANSWER✔✔-Herbicides |which |move |in |the |phloem |
of |plants
Category 1A Exam Questions With Correct
Answers
What |is |the |greatest |hazard |when |applying |most |herbicides? |- |CORRECT |ANSWER✔✔-Injury |to
|nontarget |plants
Name |some |herbicides |which |are |very |effective |against |germinating |weeds |but |less |effective |
on |established |weeds. |- |CORRECT |ANSWER✔✔-Frontier, |Lasso, |and |Dual
What |soil |conditions |reduce |the |activity |of |many |herbicides |and |require |increased |rates |for |
adequate |weed |control? |- |CORRECT |ANSWER✔✔-Higher |levels |of |soil |organic |matter |or |clay
Two |herbicides |which |are |more |active |on |soils |with |a |pH |above |7.5 |and |can |injure |soybeans |- |
CORRECT |ANSWER✔✔-Sencor |and |Lexone
Where |are |high |pH |soils |most |common |in |Iowa? |- |CORRECT |ANSWER✔✔-Next |to |limestone |
and |gravel |roads
Two |herbicides |that |are |more |persistent |and |likely |to |carryover |residues. |- |CORRECT |
ANSWER✔✔-Atrazine |and |chlorimuron
What |factors |can |increase |chances |of |herbicide |carryover? |- |CORRECT |ANSWER✔✔-Dry |
weather, |high |rates, |late |application, |and |in |the |case |of |some |herbicides, |high |soil |pH
, Can |additive |injury |occur |when |applying |Sencor/Lexone |on |soybeans |in |fields |with |atrazine |
carryover |residues? |- |CORRECT |ANSWER✔✔-Yes
What |do |preemergence |herbicides |rely |on |to |move |the |herbicide |into |the |weed |seed |
germination |zone |(top |1/2-1 |inch) |of |soil? |- |CORRECT |ANSWER✔✔-Rainfall |or |irrigation
What |tillage |tools |will |improve |weed |control |when |rainfall |does |not |occur |soon |after |herbicide
|application, |and |weeds |begin |emerging? |- |CORRECT |ANSWER✔✔-Rotary |Hoe |and |Harrow
Name |3 |herbicides |which |must |be |incorporated |to |prevent |evaporation |loss. |- |CORRECT |
ANSWER✔✔-Sultan+, |Eradicane, |Eradicane |Extra
Define |photodecomposition |- |CORRECT |ANSWER✔✔-Chemical |breakdown |caused |by |exposure
|to |light
Name |two |herbicides |that |must |be |incorporated |to |prevent |photodecomposition. |- |CORRECT |
ANSWER✔✔-Treflan, |Sonalan
Why |are |Basagran, |Blazer, |Buctril, |Poast |Plus, |and |Fusilade |2000 |only |applied |postemergence?
|- |CORRECT |ANSWER✔✔-They |have |little |or |no |soil |activity
Are |Roundup |and |Gramoxone |Extra |selective |or |nonselective |herbicides? |- |CORRECT |
ANSWER✔✔-Nonselective
Are |Blazer, |Basagran, |Buctril, |and |Gramoxone |Extra |contact |herbicides |or |translocated |
herbicides? |- |CORRECT |ANSWER✔✔-Contact |herbicides
Define |translocated |herbicides |- |CORRECT |ANSWER✔✔-Herbicides |which |move |in |the |phloem |
of |plants
