Effects of planting options and irrigation schedules on development of powdery mildew and yield of wheat in the North Western plains of India
2004
Sharma, A.K. | Sharma, R.K. | Babu, K.S.
Powdery mildew (c.o. Erysiphe graminis tritici E. Marchal) is an important disease of wheat in the North Western plains zone of India, especially in the context of the present day varieties that are being cultivated in this zone. The pest situation is likely to change with change in microclimate due to introduction of new tillage systems. Studies were thus undertaken to evaluate the effect of planting options and irrigation schedules on the incidence of powdery mildew disease in wheat (Triticum aestivum L. emend. Fiori and Paol.). The various planting options studied were, conventional flat bed system, furrow irrigated raised bed-planting system (FIRBS) with 2 and 3 rows on each bed and flat beds having similar row configuration as the FIRBS. The incidence of powdery mildew was significantly higher on FIRBS as compared to the conventional flat bed sowing or strip row orientation. Incidence of the disease was higher in wetter irrigation schedule but the differences were significant only during the first year. Irrigation had no effect on yield during both the years. Various aspects of microclimate and epidemiology as influenced by the tillage practices are discussed.
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