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Inorganic Insecticides

 

WHAT ARE INSECTICIDES?

                 

Organochlorines

Inorganic minerals such as heavy metals and arsenical compounds have been used as insecticides, although they are usually toxic to a wide range of organisms, and in general are not specific in their action.

 

The word "Insecticide was first used about 130 years ago, although primitive insecticides have been in use for several thousands of years.  Several categories of insecticides exist:
  • Inorganic
  • Organochlorines
  • Organophosphates
  • Carbamates
  • Botanicals
  • Miscellaneous

 

Parathion - An axample of an acetylcholinesterase inhibitor

Parathion - An Acetylcholinesterase inhibitor

 

Advances in the 1930's with synthetic organic chemistry led to the rapid development of OC molecules.  Their use is now increasingly restricted.

Carbamates

Organophosphates

Synthetic versions made available in the early 50's, Carbamates are generally quick acting with relatively low mammalian toxicity, although exceptions do exist.

This group varies widely in its insecticidal activity and mammalian toxicity.  Mode of action is the inhibition of the enzyme Cholinesterase - crucial for normal nervous impulse transmission.

 

Botanicals

Miscellaneous

Insecticides of vegetable origin.  Many are still used today.  This class of molecules includes Pyrethrin, Nicotine and Derris.

 

Biologicals, Fumigants, and other types of insecticide are classified in this section.

                   

                       

 

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