Pesticides are poisonous chemicals that kill pests.
To be effective, a pesticide should:
- Be specific: It should only be toxic to the organism it is intended to kill, so it's not harmful to humans, natural predators of the pest, earthworms, pollinating insects (bees) and just general everything else.
- Biodegrade: So it will break down into chemically harmless substances/molecules. However, it must also be chemically stable to have a long shelf-life.
- Cost-effective: It is v expensive to produce pesticides and pests can quickly develop genetic resistence to pesticides, rendering them ineffective.
- Not accumulate: It should not accumulate as it goes down the food chain or in a particular organism.
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