Abstract
Studies on the factors responsible for reddening in Bt cotton are due to increased incidence of sucking pests, especially leafhoppers, use of susceptible hybrids and improper nutrient management. Validation of integrated module comprised use of sucking pest-tolerant cotton hybrid; balanced and timely soil application of macro- and micro-fertilizers as per recommendation based on site-specific soil test results; threshold-based management of sucking pests, especially leafhoppers, using systemic insecticides; foliar applications of Mancozeb 75WP at 2 g/L against leaf spot disease; three foliar applications of water-soluble multinutrient mixtures at 4 ml/L during 60, 75 and 90 DAS and weeding during first 40 DAS proved best for the management of Bt cotton reddening. Differential response to reddening was found among the cultivated commercial Bt cotton hybrids. Among the hybrids tested, Jackpot, MRC-7347, Marvel and MRC-7351 were found tolerant to sucking pests and, in turn, the manifestation of reddening symptoms. Bt hybrids such as RCH 2, RCH 530, Brahma, Arya and Bunny were highly sensitive to insect-induced reddening.
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Ghante, V., Chowdary, R., Bheemanna, M., Arunkumar, H., Kumar, R. (2015). Integrated Management of Insect-Induced Reddening in Bt Cotton Hybrids. In: Chakravarthy, A. (eds) New Horizons in Insect Science: Towards Sustainable Pest Management. Springer, New Delhi. https://doi.org/10.1007/978-81-322-2089-3_25
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DOI: https://doi.org/10.1007/978-81-322-2089-3_25
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