Effect of nitrogen doses and irrigation intervals on Stemphylium blight and thrips in onion

The experiment was conducted at National Horticultural Research and Development Foundation, Regional Research Station, Karnal during Rabi 2002–03, 2003–04 and 2004–05 to study the agronomic practices for the management of Stemphylium blight diseases and thrips. Three irrigation intervals viz. 4, 7 and 10 days and 5 nitrogen doses i.e. 50, 75, 100, 125 and 150 kg/ha were evaluated on onion variety Agrifound Light Red (ALR). Stemphylium blight disease incidence/intensity, thrips incidence and population were recorded at fortnightly intervals along with yield parameters. The results indicated that at 10 days irrigation interval and high doses of nitrogen i.e. 125/150 kg/ha was adjudged better in reducing Stemphylium blight disease and increasing bulb yield.