Effect of epidemiological factors on the growth and development of Fusarium graminearum and head blight of wheat
Keywords:
Wheat, Fusarium graminearum, temperature, pH, weather.Abstract
Fusarium head blight (FHB), is a serious disease causing significant reduction in yield and quality of wheat grains throughout the world. An in vitro experiment was conducted to find out the suitable temperature and pH for the growth and sporulation of Fusarium graminearum, the main causal agent of FHB. The results showed 6 that the maximum growth of the fungus (90.00 mm), highest sporulation of 5.5×10 conidia per ml and perithecia formation occurred at 25ºC. A pH of 5 resulted in the maximum growth (86.00 mm) of the fungus, 6 highest sporulation (5.7×10 conidia/ ml) and perithecia formation. The studies on the effect of weather variables viz., temperature, relative humidity and rainfall on the development of FHB in wheat crop sown at st th st three different dates i.e. 31 October, 15 November and 1 December during Rabiseason of 2019-20 and 2020- 21 revealed that all the weather parameters contributed positively in the development of the disease and the disease severity was highest on late sown crop during both the cropping years.Downloads
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