• Occur in patches
• Leaves - turn yellow and then dry up slowly
• Entire plant shows complete drying of the foliage
• Bulb - shows soft rotting and the roots get rotted
• Whitish mould growth on the scale

• Produces many chlamydospores which are thick walled resting spores
• Microconidia – one celled and thin walled

Mode of spread and survival:

• Soil borne
• Infection occurs through root, either directly or through wounds
• Soil insects are common carriers

Epidemiology:

• High temp and low level of soil moisture - favourable for high disease incidence
• Temp- 28 to 32°C

• Field sanitation - destruction of infected plant debris
• Soil drenching - COC-0.25%
• Pre planting treatment of bulbs - benomyl 15%+ mancozeb 60%
• Local Bellary, Poona Red Globe, Patna Red, White Large - resistant varieties