Rust

Rust
Rust
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Phakopsora pachyrhizi Syd. & P. Syd.
Symptoms

• The disease begins with small water soaked lesions which gradually increase in size, turning from grey to tan or brown.
• Tan to dark brown or reddish brown lesions are appear on the underside of leaflets.
• Lesion may also appear on petioles, pods and stems.
• In severe case leaf necrosis and complete death of infected areas may result.

Control

• Deep summer ploughing.
• Do not cultivate soybean in rabi season.
• Use tolerant cultivars like Ankur, JS 80-21, PK 1024, PK 1029.
• Destroy last crops infected stubble. Spray schedule has to be initiated before symptoms appear.
• Use Mancozeb at 3gm/l
• Spray Hexaconazole or Propoconazole 1 ml/l.