5.4b understand the reasons for pest control and the advantages and disadvantages of using biological control with crop plants.
Biological control:
Introduced species
Advantages:
1. There are no toxic chemicals involved
2. Less impact on man/wildlife
Disadvantages:
1. Not 100% effective
2. Often difficult to control (introduced species will find alternative prey to feed on and not actual die out ones the pest has been removed.)
3. Difficult to match a predator to the prey
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