VEERESH HRAKESH KUMAR BEHERA2020-07-232020-07-232019-07-30250http://krishikosh.egranth.ac.in/handle/1/5810149723The field experiment was conducted at the Main Agricultural Research Station, Raichur, Karnataka during the kharif 2018-19 with eight treatments replicated thrice in a completely randomized block design to assess the effect of conventional and multi-nutrient fertilizers on management of leaf reddening in Bt cotton. The results revealed that incidence of leaf reddening in Bt cotton was decreased significantly on application of RDF along with foliar spray of MgSO4 (1%) + 19:19:19 (1%) at flowering, boll initiation and boll development stages. Similarly, the extent of management of leaf reddening incidence was on par with the application of RDF along with foliar spray of laboratory prepared multi-nutrient Bio-mix solution @ 10 ml litre-1 at flowering, boll initiation and boll development stages. Therefore, the above treatments respectively recorded significantly higher seed cotton yields (3226 kg ha-1 & 3005 kg ha-1) over the other treatments. The quality parameters of cotton were also of high grade in these treatments. The foliar nutrition of Bt cotton helped in better management of leaf reddening as well as in meeting the nutritional demand of the crop at different physiological growth stages and thus a higher gross returns (Rs 1,74,222 ha-1), net returns (Rs 1,12,579 ha-1) and B:C (2.83) was achieved with treatment: RDF along with foliar spray of MgSO4 (1%) + 19:19:19 (1%) at flowering, boll initiation and boll development stage which was on par with the treatment: RDF along with foliar spray of Bio-mix @ 10 ml litre-1 at flowering, boll initiation and boll development stages. Finally, it can be concluded that leaf reddening in Bt cotton can be effectively managed and one can fetch higher returns through inclusion of foliar nutrition as a standard practice of crop nutrition in Bt cotton along with standard pest management and agronomic practices.ennullThesis