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Unit Three > Crop Protection > Flashcards

Crop Protection Flashcards

1
Q

What is a monoculture

A

When Only one plant makes up the community

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2
Q

Weeds compete for…

A

Water
Light
Space
Nutrients

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3
Q

Weeds can:

A

Release chemicals to inhibit growth of crops

Contaminated grain crops

Act as hosts for crop priests and diseases

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4
Q

What are the two types of weed

A

Annual

And

Perennial

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5
Q

Annual weeds

A

They grow and disperse their seeds and die within one growing season

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6
Q

Perennial

A

They life for more than two years, remaining dormant in winter before growing again in spring

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7
Q

Three types of pests

A

Insects
Mollusc (slugs)
Nematode (worms)

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8
Q

Herbicides kill…

A

Weeds

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9
Q

Fungicides kill….

A

Fungus

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10
Q

Molluscicides kill

A

Mollusc pests

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11
Q

Nemotides kill

A

Nematode pests

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12
Q

Herbicides can be either:

A

Selective

Or

Systemic

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13
Q

Selective herbicides

A

This speeds up the metabolism of broad leaves weeds to the extent that they use their food reserves and di

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14
Q

Systemic herbicides

A

Absorbed by the eeeds and spread through the vascular system to all areas of the weed

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15
Q

Advantage of selective herbicides?

A

Greater effect of certain plant species (broad leaves weeds)

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16
Q

Advantage of systemic herbicides

A

Can reach underground storage organs and root systems and kill them preventing regrowth

17
Q

What are fungicides

A

Chemicals used to control pathogenic fungi

18
Q

Pesticides should be

A

Specific to pest concerned

Short life

Safe for human users

19
Q

Pesticides can be

A

Toxic and persist in the environment

20
Q

What is biosccumulation?

A

Term to describe the build up of a chemical in an organism

21
Q

What is biomagnificstion?

A

An increase in the concentration of a chemical moving between trophies levels

Unit Three (6 decks)

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