3.3 Crop Protection Flashcards

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1
Q

Why would a selective herbicide be used?

A

Selective herbicides have a greater effect on certain plant species (broad leaved weeds)

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2
Q

Why would a systemic herbicide be used?

A

Systemic herbicide spreads through the vascular system of plants and prevents regrowth

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3
Q

What do systemic insecticides do?

A

Systemic insecticides spread through the vascular system of plants and kill pests feeding on plants

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4
Q

What is bioaccumulation?

A

Bioaccumulation is a build up of chemical in an organism

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5
Q

What is biomagnification?

A

Biomagnification is an increase in the concentration of a chemical moving between trophic levels

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6
Q

What is biological control?

A

The introduction of a natural predator, parasite or pathogen of the pest

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7
Q

What is integrated pest management?

A

The use of chemical, biological and cultural control

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8
Q

What are the risks associated with biological control?

A

The control organism may become an invasive species, parasite or pathogen of other species

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