Crop Protection

Question 1

What are the properties of annual weeds

Answer 1

Rapid growth, short-life cycle, high seed output and long-term seed viability

Question 2

What are the properties of perennial weeds with competitive adaptions

Answer 2

Storage organs and vegetative reproduction

Question 3

Name 3 common pests of crops

Answer 3

Nematode worms, insects and molluscs, they often carry plant diseases from fungi, bactieria or viruses

Question 4

Name 3 cultural methods to control weeds, pests and diseases

Answer 4

Ploughing, weeding and crop rotation

Question 5

Name 3 causes of plant diseases

Answer 5

Fungi, bacteria and viruses often carried by pests

Question 6

Describe the uses of systemic and selective herbecides

Answer 6

Selectives have a greater effect on certain plant species (broad leaved plants) while systemics spread through vascular system of plants and prevents regrowth

Question 7

Name 4 problems of pesticides

Answer 7

Toxicity to non-target species, persistence in the environment, bioaccumulation or biomagnification in food chains, producing resistant problems of pests

Question 8

What is the control agent in biological control of pests?

Answer 8

A natural predator, parasite or pathogen of the pest

Question 9

What is IPM (integrated pest management)?

Answer 9

A combination of cultural, biological and chemical methods of control

Question 10

What is the risk of biological control

Answer 10

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