ch 13 study question

Question 1

what are some ways that weeds are classified?

Answer 1

• monocots= grassy weeds
• dicots= broadleaf weeds
• growth habits: annual (summer/winter), biannual, perenial

Question 2

why is it important to identify weeds before attempting to control them?

Answer 2

a chemical may kill one species of weeds, but not the other

Question 3

how can weeds be controlled by crop rotation?

Answer 3

some crops offer more competition to certain weeds than others do. tall-growing plants, for example, compete more than shorter plants. herbicides may also be rotated to reduce the possibility of weed species developing tolerance or resistance to a herbcide

Question 4

what is the difference between a pre emergent and a post emergent herbicide?

Answer 4

• pre emergents help prevent new weeds from cropping up

- post emergents control weeds that have already germinated.

Question 5

what herbicide effectively controls nutsedge?

Answer 5

dalapon or glyphosate

Question 6

what herbicides can be used to control wild garlic in turf and when should they be applied?

Answer 6

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