Cause for alarm

  • 14/12/1997

  • Down To Earth

biological pesticides offer a more sound means of controlling insect pests than synthetic chemicals. A bacterium called Bacillus thuringiensis ( b t) produces a crystalline protein that is highly toxic to moth larvae. At a time, when nearly 500 species of arthropods have evolved insecticide resistance to other pesticides, there is only one crop pest