Today we are covering from the specification:

Types of Pest Control

• Cultural practices• Chemicals• Biological control• Integrated pest management (IPM)

Cultural Methods

‘Traditional’ farming practices, e.g.

-Weeding-Crop rotation-Intercropping-Tilling-Physical barriers

Chemical Pest ControlUse of pesticides: herbicides, insecticides and fungicides to kill pests.

May affect other organisms. Must be selectively toxic (narrow-spectrum) and biodegradable – why?

Needs to be reapplied – expensive!

May lead to resistance.

Biological Pest Control

Uses living organisms.

Natural predators/parasites/pathogens.

Keep pest organism population below economic threshold.

Must ensure the control measure doesn’t become a pest.

Integrated Pest Management

Involves careful monitoring of pest population to keep it below the economic threshold.

Two or more types of pest control are used in combination.

Integrated Pest Management

4 stages:1.Identify pests and economic threshold.2.Use suitable cultural methods to control pest populations.3.If threshold is exceeded, use biological control.4.If biological control doesn’t work, use pesticides, but at a low and carefully controlled dose.

Sort out the statements under 4 headings:

• Cultural practices• Chemicals• Biological control• Integrated pest management (IPM)

Questions

Work in groups of 5.

Each person has a different question.

You have 1 minute to write down an answer worth 1 mark.

Pass the question on and repeat (with 30s extra to read the answers already written).