Vol. 11, Issue 8 (2022)

Author(s):
Chaudhari RJ, Kelaiya DS, Vyas UM, Parmar SK and Patel PR

Abstract:
Cotton (Gossypium spp.) is one of the most ancient and important commercial crop next only to food grains and is the principal raw material for a flourishing textile industry. Cotton, although under pressure from synthetic fibers, has made resurgence worldwide and remains as the most improved crop species producing lint plus oil and meal from seed. The major cotton growing districts/area in Gujarat is Kutch, Saurashtra and North Gujarat; however, cotton is grown in almost all the districts of Gujarat. Though cotton is seriously affected by many diseases, leaf blight caused by Alternaria macropora Zimm, is an important destructive disease in all over in Gujarat and other part of country. Among different varieties/genotypes were screened against A. macropsora under natural conditions, none of the entries was found immune at 90 DAS, 31 entries showed resistant reaction, 18 showed moderately resistance or tolerant reaction and only one entries GBHV 241 was found moderately susceptible. Thirteen entries were showed resistant reaction, 25 entries showed moderately resistance or tolerant reaction and 12 entries found moderately susceptible. None of the entries was found highly susceptible at 120 DAS.