3.3 Crop Protection

Question 1

What reduces productivity in crop plants?

Answer 1

Weeds competing with crop plants
Other pests and diseases damaging crop plants

Question 2

What are the properties of annual weeds?

Answer 2

Rapid growth
Short lifecycle
High seed output
Long term seed viability

Question 3

What are the properties of perennial weeds (with competitive adaptations)?

Answer 3

Storage organs
Vegetative reproduction

Question 4

What are the kind of crop plant pests?

Answer 4

Invertebrate animals, such as insects, nematode worms and molluscs

Question 5

What causes plant diseases?

Answer 5

Fungi, bacteria or viruses (which are often carried by invertebrates)

Question 6

What are the cultural methods of controlling weeds, other pests and diseases?

Answer 6

Ploughing
Weeding
Crop rotation

Question 7

What are the two types of advantages of pesticides?

Answer 7

Selective or Systemic

Question 8

What are the 5 kinds of pesticides and what do they do?

Answer 8

Herbicides- to kill weeds
Fungicides- to control fungal diseases
Insecticides- to kill insect pests
Molluscicides- to kill mollusc pests
Nematicides- to kill nematode pests