Unit 3 Key area 3

Question 1

Chemical used to control pests

Answer 1

Pesticide

Question 2

Type of non-selective herbicide that destroys all green plant tissue which it meets

Answer 2

Contact

Question 3

Type of herbicide that mimics plant growth substances and kills broad-leaved plants by stimulating their growth to a harmful extent

Answer 3

Selective

Question 4

Type of herbicide that is absorbed by a plant and transported internally to all parts where it has a lethal effect

Answer 4

Systematic

Question 5

Disease-causing mirco-organism

Answer 5

Pathogen

Question 6

Weed that continues to grow for several years

Answer 6

Perenial

Question 7

Weed that completes its life cycle within one year

Answer 7

Annual

Question 8

Means of control of weeds, pests and pathogens using pesticides, herbicides and fungicides

Answer 8

Chemical

Question 9

Traditional non-chemical means of controlling weeds, pests and pathogens that affect crop plants

Answer 9

Cultural

Question 10

Agricultural practice whereby each of a series of different crop plants is grown in turn on a piece of ground

Answer 10

Crop rotation

Question 11

Combination of techniques including chemical, biological and cultural means of control

Answer 11

Integrated pest control

Question 12

Reduction of a pest population by the deliberate introduction of one of its natural enemies

Answer 12

Biological control

Question 13

Unwanted plant that poses economic problems when it is able to multiply among and compete with a crop

Answer 13

Weed

Question 14

Vast population of a single species cultivated for economic efficiency

Answer 14

Monoculture

Question 15

Type of pest that survives treatment by a pesticide and enjoys a selective advantage

Answer 15

Resistant

Question 16

Non-biodegradable chemical whose molecules accumulate along a food chain

Answer 16

Persistant