Symptoms of damage:

• Onion leaves get rotten, shredded and rolled up
• Growth of onion tubers gets hampered, tissues get decayed and becoming unfit for marketing

 Identification of Pest:

• Egg: long whitish colour eggs are laid on the undersurface of onion near soil
• Larva: Whitish and adopous
• Pupa: Pupation takes place in soil
• Adult: Grey coloured fly

 Management:

• Adopt proper crop rotation
• Spray malathion 1 lit/ha