Gall midge: Orseolia oryzae Wood - Mason (Diptera: Cecidomyiidae)

Local name: Kane

Vernacular name: Aane kombu

Damage symptoms:

• The maggot feed on the apical point of the central shoot.
• It resembles as an onion leaf glistens in the field and central shoot is converted to long tubular structure known as galls or silver shoots.

   

                        Onion shoot

Management:

Cultural practices:

• Use resistant varieties Shakti, Phalugna, Mahaveer, Latha, MO-4, and Netravati (zone 10)
• Early planting of paddy,

Biological control:

• Wolf Spider Pardosa psuedoannulata and Lynx spider Oxyopes javanus feeds on maggots

Chemical control:

ETL: One gall/m2 or 5% affected tillers

• Spray Monocrtophos 35 EC @ 2ml/l at nursery stage.
• Application of phorate 10G@ 4kg/acre or carbofuran 3G@ 10kg/acre insecticides in presence of thin film of water in the field
• Application of phorate 10 G @ 75g/or carbofuron 3 G @ 1.25kg/seed bed followed by light irrigation.
• Application of carbofuron 3G @4kg/acre or phorate 10G @5kg/acre or Quinolphos 4% @12kg/acre to soil.