Effect of agronomic practices and fungicidal application on the powdery mildew of wheat
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Keywords:Blumeria graminis f. sp. tritici, chemical control, Erysiphe graminis tritici, powdery mildew, wheat
The effect of seed rate (35, 40, 45, 50 kg/acre), time of sowing (Nov. 1, Nov. 15 and Nov. 30) and methods of sowing (flat and ridge sowing) on the powdery mildew of wheat was studied under the present investigation. Severity of the disease significantly reduced with less seed rate and delayed sowing. Ten fungicides viz., Tilt 25 EC (propiconazole), Folicur 25 EmC (tebuconazole), Folicur 430 SC (tebuconazole 430 SC), Bayleton 25 WP (triadimefon), Amistar Top 325 SC (azoxystrobin + difenoconazole), Amistar Extra 280 SC (azoxystrobin + cyproconazol), Picoxystrobin + Propiconazole 20 EC, Navito 75 WG (trifloxystrobin + tebuconazole), Opera 25 SC (pyraclostrobin + epoxyconazole) and Karathane 48 EC (Dinocap) were tested under laboratory conditions at different concentrations viz., 10 ppm, 25 ppm, 50 ppm, 100 ppm and 200 ppm. These fungicides were also evaluated under field conditions at recommended doses and all of them reduced the disease significantly in comparison to control.
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