Prediction of cotton seedling germination against pre-emergence damping off on the basis of environmental factors and seed applied fungicides

Abstract

Cotton is an important fibre crop chiefly attacked by a number of diseases. Pre-emergence damping off seedling is an important disease of cotton. Efficacy of three fungicides (Dynesty, Topsin-M and Antracol) was assessed on early mid and late sowings. Topsin-M and Antracol were evaluated at 1X and 2X concentrations, Dynasty was only used at standard dose. Significant increase in seed germination was seen, maximum germination was observed in late sowing. Antracol (2X) significantly improved seed germination rate in all three sowings as compared to other treatments. Impact of environmental parameters on germination rate was assessed relating to seed dressing fungicides at 1X and 2X concentrations. Significant correlation was observed between soil temperature and seedling germination rate by all treatments, 30-31C favoured germination rate. Maximum seedling germination rate was observed at 24-26 and 22-23C and 45-50% by average air temperature, minimum air temperature and relative humidity respectively. Regression model was contrived to predict seedling germinations impacted by seed dressing fungicides relating to environmental factors. Closed resemblance between observed and predicted values states that model can be used to predict seed germination by treating with fungicides regarding to environmental factors.

Publication
Archives of Phytopathology and Plant Protection, 47(15)
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