Jassid   (Amrasca bigutulla bigutulla)

Identification

Adults are about 3 mm long and greenish yellow during summer and have reddish tinge during winter. The hind portion of the forewings have two black spots on the vertex. Nymphs are greenish yellow and wedge shaped.  The eggs are laid in to the parenchymatous tissue of the leaves. Nymphal and adult stages last for 7 -21 days and 35 - 50 days respectively. 

Both adults and nymphs suck sap from underside of the leaves and devitalise the plants. Leaves turn pale, red rust, drop downwards and dry up when infestation is severe.

Management

• Sow the crop early.

• Use resistant varieties such as Khandwa-2, G. Cot 12, Bandnawar-1, DHY 286, B 1007, J 64, MCU-5 or the variety having leaves rich in tannin contents.

• Do not use  high doses of "N" fertilizers.

• Use yellow sticky traps.

• Release predator Chrysoperla carnea @  50,000 grubs/ eggs/ha or Coccinella septumpunctata or syrphus/ scymnus sp.

• Conserve spiders Distina albida and ants like Camponotus sp.

• Spray methyl demeton 25 EC or phosphamidon 100 EC or dimethoate 30 EC @  500-750 mlt/ha when ETL has reached (50-100 nymphs per 50 random leaves).