Chemical vs Natural
Chlorinated hydrocarbons
- DDT, dieldrin, aldrin, chlordane, lindane, toxophene
organophosphates
- malathion, parathion, diazinon
natural insecticides more specific
- Bacillus thuringiensis (many species, safe, specific)
- Baculovirus (specific infection of insects)
- problems (low potency, high cost?)