This is the first 1,000 characters of 318 words (1.27 pages) in the essay titled Pesticides
Give an account of the ways in which biological control can be used to control pest numbers.
The effect of predator-prey relationship in regulating populations has been exploited by humans as a method of controlling various pests. Biological pest control is where the natural predators (agent) of the pest ((target) are used to reduce its population to a tolerable level. It is important to make sure that the right predator is chosen, so it must be studied in quarantine to make sure that once the number of prey drop it will not change to attack another species and become a pest itself. It must have a fast enough reproductive rate in order to take control before the crop is ruined and it should be native to the environment to avoid unforeseen effects. In general it is best to use herbivores to get rid of weeds e.g. the use of cactoblastis larvae which makes the prickly pear susceptible to fungi thus killing it is used in Australia. To control herbivores like aphids, car...
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