The onion (Allium cepa L) is one of the most important commercial vegetable crop.The major onion growing states are Maharasthra, Karnataka, Orissa, Tamilnadu, Uttar Pradesh, Andhra Pradesh, Bihar and Gujarat.
Indian Institute of Horticultural Research, Bangalore has developed several onion varieties namely Arka Kalyan, Arka Bheem, Arka Niketan, Arka Pragathi, Arka Bindu, Arka Pitamber etc. for high yielding, Rabi and kharif season and for export market as well.
Onion diseases and disorders have always been an important factor for the loss. To combat these factors we need to identify the symptoms, understand the exact cause beneath and endeavour effective measures to irradicate the pathogen at the earliest as possible.
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 .