(ii) Biopesticides that are neem based or HaNPV (virus) were found to be more effective on larvae surviving on Bt-cotton because of their slower growth as compared to those on the conventional non-Bt cotton. Hence these would be useful to manage younger larvae on 60-90 days old crop.
Alternatively, eco-friendly insecticides such as spinosad, emamectin benzoate, novaluron or Indoxacarb can be used on 90 and 120 days old crop to reduce populations of resistant insect genotypes.
(iii) Use of attractive synchronous alternate host crops such as marigold, sunflower, chillies etc. for H. armigera which could be used as intercrop or trap crop refuges.
(iv) Use alternate genes that do not share common resistance mechanisms as that of Cry1Ac, in transgenic plants either in rotation or alternation or mixtures such as the dual-gene based Bt-cotton varieties.
Press Information Bureau Government of India
marketing@alchempro.com
