pesticide
noun /ˈpestɪsaɪd/
  /ˈpestɪsaɪd/
 [countable, uncountable]- a chemical used for killing pests, especially insects
- vegetables grown without the use of pesticides
 - crops sprayed with pesticide
 
Extra ExamplesTopics Farmingb2- It is claimed that current levels of pesticide do not pose a threat to health.
 - Some weeds have developed resistance to agricultural pesticides.
 - Traces of pesticide in the water were ten times above permissible levels.
 - tests for pesticide contamination in food
 - the risk of pesticide exposure among farm workers
 - the threat to human health from chemical pesticides in our food
 
Oxford Collocations Dictionaryadjective- chemical
 - synthetic
 - organic
 - …
 
- level
 - trace
 
- use
 - levels
 - residues
 - …
 
- resistance to pesticides
 - the use of pesticides