Lecture 7- Weeds Flashcards Preview

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Flashcards in Lecture 7- Weeds Deck (8)
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1

What is an example of a broad leaved weed?

Cleavers
Docks

2

What is an example of a grass weed?

Black grass

3

What's an example of biennial weeds?

Ragwort

4

What makes a good weed?

Rapid population establishment
Seed dormancy
Adaption for spread

5

Why do we control weeds?

Reduce yield
Reduce crop quality
Hosts diseases
Affects crop rotations

6

Any benefits for weeds?

Flowering weeds provide nectar for bees
Add organic matter
Habitat for wildlife

7

When does black grass and ryegrass germinate?

Mainly Autumn

8

Any problems with agrochemical weed control?

Herbicide resistance
Availability
Leaching