Disease management

Onion diseases  have always been an important factor for the loss. To combat these we need to identify the symptoms, understand the exact cause beneath and endeavour effective measures to irradicate the pathogen at the earliest as possible


Pest management
It is important that onion Pest be recognized early in their development so that effective management strategies can be implemented. Thrips are the most important insect pests on onions. Adults are yellowish to yellowish brown with narrow wings 




Soil & Climate

Soil: Onions can be grown on all types of soil such as sandy loam, silt loam and heavy clay soils. However, deep friable, highly fertile sandy loam to clay soil rich in humus is considered as ideal. Sandy soil needs frequent irrigation and favours early maturity. Whereas heavy soils restrict the development of bulbs and the crop matures late as compared to light soils. A pH range between 5.8-6.5 is considered as optimum. Good drainage is essential as water-logging results in total failure of the crop.

The onion is cool season crop, tolerant to frost in the young stage but less sensitive to heat. It is well adapted to a temperature range of 13-25 oC. A temperature range of 15-21 oC before bulbing is required for its good vegetative growth whereas a temperature of 20-25 oC is considered ideal for bulb development. Very low temperatures in the beginning favours physiological disorder called bolting. Sudden rise in temperature favours early maturity of the crop in rabi and results in small size of bulbs. At least 10 hours light with favorable temperature is essential for growth, development and bulbing. Onion thrives well in places, which receive an average rainfall of 750-1000 mm during monsoon.

Seed rate & Sowing

Nursery management


Broadcasting or drill sowing

Planting bulbs

Manures and fertilizers & Weeding

Irrigation and inter-culture

Harvesting and yield



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