A Review on Management of Late Blight of Potato Through Host Resistance and Chemical Fungicides
2015
Sharma, Pranamika | Saikia, M. K. | Nath, B. C.
Host resistance to late blight was of significance in integrated late blight management due to its longterm economic benefits for small-scale farmers. It also minimized changes in the population structure of Phytophthora infestans, decreasing the likelihood of fungicide resistance. In this regards Conventional breeding efforts have produced more than a dozen late blight resistant varieties, which have been deployed throughout the country. Again, the use of chemical fungicides had resulted in an increased degree of pathogen resistance. Sensitivity of P. infestans to Metalaxyl was monitored on potato leaf disks, detached leaves, or whole plants. The continuous changes in P. infestans populations required careful adaptation of successful disease management programmes. Combination of cultivar resistance and regular applications of protective fungicides were reported to reduce foliar late blight infection in potato. Also Modern approaches in chemical control emphasized on reducing fungicide inputs, combined with using potato cultivars possessing acceptable levels of non-race specific resistance to late blight.
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