Biological control is an alternative to pesticides, it involves using other organisms to control pests (e.g. introducing hoverflies to an area to reduce the amount of aphids, as aphids kill hoverflies). This has a longer lasting effect on the crop/area than pesticides do and is less harmful to the ecosystem. However, it can cause problems. for example, the introduced species could become uncontrollable and their predator would have to be introduced to control them. It can also take longer (potentially).
A blog covering and explaining the Edexcel IGCSE Biology specification for the 2016 summer exams. If you are doing just double science, you do not need to learn the stuff for paper two, if you are doing triple you will need to learn all (GOOD LUCK!) I have separated the papers to make files easier to find. Hope it helps :)
Wednesday, 11 May 2016
5.4 understand the reasons for pest control and the advantages and disadvantages of using pesticides and biological control with crop plants
Pesticides/pest control kills insects/microorganisms/mammals that feed on crops. they are useful as they are very effective. However, they are poisonous to humans so must be used carefully around foods etc (e.g. growing carrots) and some pesticides are harmful to other wildlife.
Labels:
crop plants,
food production,
Paper 1,
section 5
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If those potential pest disasters do arise, it is very likely that those who put these measures in place should get paid significant dividend. pest-controlsandiego.com
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ReplyDeleteis the hoverfly example a slight mistake/ typo? otherwise rlly helpful
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