Crop protection Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

Describe the effects of weeds, pests and diseases on crop plants?

A
  • Weeds COMPETE with crop plants, while pests and diseases DAMAGE crop plants all of which reduce productivity.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the properties of annual weeds?

A
  • rapid growth
  • short life cycle
  • high speed output
  • long term seed viability
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the properties of perennial weeds with competitive adaptations?

A
  • storage organs
  • vegetative production
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

State the pests of crop plants?

A

most are invertebrate animals such as insects, nematode worms and molluscs.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the cause of diseases with these plants?

A

Diseases in the plants can be caused by fungi, bacteria or viruses, which are often carried by invertebrates.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How do we control the pests, diseases and weeds?

A

Ploughing, weeding and crop rotation.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Describe the pesticides?

A
  • Pesticides include herbicides to kill weeds.
  • Fungicides to control fungal diseases.
  • insecticides to kill insect pests.
  • molluscicides to kill mollusc pests.
  • nematicides to kill nematode pests.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Describe systemic and selective herbicides.

A
  • selective herbicides have a greater effect on certain plants species (broad leaved weeds).
  • systematic herbicides spread through the vascular system of plants and prevent regrowth.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Describe systemic insecticides, molluscicides and nematicides?

A

They spread through the vascular system of the plant and kill the insects feeding on the plant.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

State the problems with using pesticides?

A
  • toxicity to non-target species.
  • persistence in the environment.
  • bioaccumulation or biomagnification in food chains.
  • producing resistant populations of pests.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Describe the application of fungicides?

A

The application of fungicides based on disease forecasts are more effective than treating diseases crops.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is bioaccumulation and biomagnification?

A
  • Bioaccumulation is the build-up of a chemical within an organism.
  • Biomagnification is an increase in the concentration of a chemical moving between trophic levels.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Describe biological control of pests, weeds and diseases?

A

In biological control the control agent is a natural predator, for example control of glasshouse whitefly with the parasite wasp Encarsia, red spider mite with the predator mite.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Describe integrated pest management?

A

Integrated pest management is a combination of chemical, biological and cultural control.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Describe the risk of biological control?

A

The control organism may become an invasive species, parasite, prey on or be a pathogen of other species

How well did you know this?
1
Not at all
2
3
4
5
Perfectly