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Payal Kodavala1*, Prashant B. Sandipan2, R.K. Patel, Satish Kumar Sain, Kishor Sharma, Navya Sharma, Pushpa Ruwali and Vedansh Sharma
1Department of Plant Pathology, N. M. College of Agriculture, Navsari Agricultural University, (NAU), Navsari, Gujarat, India.
2Main Cotton Research Station (MCRS), Navsari Agricultural University (NAU),
Surat 395 007 (Gujarat), India
Email:payalkodavla1309@gmail.com
Received-20.02.2026, Revised-10.03.2026, Accepted-29.03.2026
Abstract: Cotton (Gossypium hirsutum L.) is one of the most important fiber crop playing a key role in the economic and social scenario of the globe. Curvularia leaf spot appear initially as small circular brown to brownish black spot surrounding with yellow, later it become dark yellow to brown hallow surrounding to brownish black spots and in severe cases, the leaves turned yellow colour and detached easily from the branch resulting in the defoliation. There was a good deal of variation in cultural and morphological characters of the pathogen under the different temperature. In morphological characteristics, the maximum dry mycelium weight (194.70mg) with abundant (16.43 millions/ml) sporulation on potato dextrose broth medium was observed at 25°C and at 15°C there was no growth and sporulation observed after 15days of inoculation. In cultural characteristics, the maximum colony diameter (87.76mm) and abundant (++++) sporulation was recorded at 25°C on potato dextrose agar medium after 10 days of incubation.
Keywords: Cotton, Morphology, Cultural, Sporulation, Curvularia
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