Sterility Mosaic Disease (SMD): Pigeonpea sterility mosaic virus (PPSMV)

• Vector : Aceria cajani

• The affected plants are stunted due to shortening of internodes.
• The auxiliary buds are stimulated to grow and the branches are crowded at the top giving bushy appearance.
• Mainly three types of symptoms are associated viz. severe mosaic in leaflets with complete sterility , mild mosaic with partial sterility and ring spots characterized by a green island surrounded by a chlorotic halo.

Management

• Rouging out infected plants up to 40 days after sowing
• Spraying with Fenazaquin @ 1 ml/ litre soon after appearance of the disease and if necessary repeat after 15 days.