BENGAL GRAM :: MAJOR DISEASE :: RUST

Rust - Uromyces ciceris-arietini
Symptoms
The infection appears as small oval, brown, powdery lesions on both the surface, especially more on lower surface or leaf. The lesions, which are uredosori, cover the entire leaf surface. Late in the season dark teliosori appear on the leaves. The rust pustules may appear on petioles, stems and pods. The pycnial and aecial stages are unknown.
Pathogen
The uredospores are spherical, brownish yellow in colour, loosey echinulated with 4-8 germ pores. Teliospores are round to oval, brown, single celled with unthickened apex and the walls are rough, brown and warty.
Mode of Spread and Survival
The fungus survives as uredospores in the legume weed Trigonella polycerata during summer months and serve as primary source of infection. The spread is through wind-borne uredospores.
Management

• Destory weed host.
• Spray Carbendazim 500 g/ha or Propiconazole 1L/ha.