Lecture 7- Weeds Flashcards
1
Q
What is an example of a broad leaved weed?
A
Cleavers
Docks
2
Q
What is an example of a grass weed?
A
Black grass
3
Q
What’s an example of biennial weeds?
A
Ragwort
4
Q
What makes a good weed?
A
Rapid population establishment
Seed dormancy
Adaption for spread
5
Q
Why do we control weeds?
A
Reduce yield
Reduce crop quality
Hosts diseases
Affects crop rotations
6
Q
Any benefits for weeds?
A
Flowering weeds provide nectar for bees
Add organic matter
Habitat for wildlife
7
Q
When does black grass and ryegrass germinate?
A
Mainly Autumn
8
Q
Any problems with agrochemical weed control?
A
Herbicide resistance
Availability
Leaching
