was introduced in against the cotton bollworm (helicoverpa armigera). cotton bollworm is a major pest of cotton. for eradication of this pest, farmers have been using multiple sprayings of chemical pesticides. bt cotton contains the cry gene obtained from bacillus thuringinesis (bt) bacteria which is...
earliest evidence of using cotton is from india and the date assigned to this fabric is b.c. there were also excavations of cotton fabrics of comparable age in southern america. cotton cultivation first spread from india to egypt, china, and the south pacific. cotton is a soft, staple fiber that grows...