Abstract
Abstract Compared to developed countries, not much work has been done on the problem of fungicide resistance in India. This could be attributed to the lack of awareness among Indian workers about the importance of the problem and the non-availability of trained scientific manpower in this field. Most of the earlier studies done on fungicide resistance in India pertained to acquired resistance using mutagens or training (pressurization) methods under laboratory conditions, without looking into their possible implications in practical disease control. However, during the past two decades, cases of resistance development in field situations have also been reported from different parts of the country. This chapter discusses the use of fungicides in India and describes some reported field cases of fungicide resistance in India: Venturia inaequalis, Gloeosporium ampelophagum [Elsinoe ampelina] and Aspergillus flavus to benzimidazoles; Drechslera oryzae [Cochliobolus miyabeanus] and Pyricularia oryzae [Magnaporthe grisea] to edifenphos; Plasmopara viticola, Phytophthora parasitica [P. nicotianae var. parasitica], P. infestans and Pseudoperonospora cubensis to metalaxyl; Phytophthora infestans to oxadixyl; and Uncinula necator [Erysiphe necator] to triadimefon. Future prospects are given.
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