Pest Control

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Across
  1. 3. Controlling pests by introducing predators
  2. 6. Controlling pests by the use of chemicals
  3. 7. An animal that has been introduced as pest control but has become a serious pest itself
  4. 8. Something that can be broken down into non-toxic substances by micro-organisms is..
  5. 9. The rate at which something is produced
  6. 11. An animal that naturally preys on others
  7. 12. An organism that competes with humans for food/space
Down
  1. 1. A toxic chemical that is used to kill only fungi
  2. 2. A toxic chemical that is used to kill only weeds
  3. 3. The build-up of toxic chemicals
  4. 4. A toxic chemical that is used to kill only insects
  5. 5. Something that can’t be broken down by micro-organisms is..
  6. 9. A substance used for destroying organisms harmful to cultivated plants
  7. 10. An interaction between organisms or species, in which the fitness of one is lowered by the presence of another