| Biopesticides |
Chemical pesticides |
| These do not harm nontarget species |
Nontarget species are also harmed |
| They do not pollute the environment |
Cause pollution; sometimes serious |
| No harmful residues remain in food, fodder and fibers |
Harmful residues may often remain in food, fodder and fibers |
| Relatively cheaper |
Relatively costlier |
| Insects are expected not to develop resistance to biopesticides |
Insects may become resistant, e.g., Heliothis has become resistant to most insecticides |
| Since they are highly specific, correct identification of the pest is essential |
It is often not critical |
| High specificity may often make the use of two or more biopesticides necessary |
Often not required |
| Performance may be variable due to the influence of biotic and abiotic factors of the environment |
This is not often the case |
