बिरुवाका रोग किरा पहिचान गरी सही उपचार विधि अपनाउनुहोस्। Identify fungal, bacterial, viral diseases and pests with organic and chemical treatments.
Yellowing and wilting of lower leaves progressing upward; pseudostem easily pulls out of the ground with rotten foul-smelling rhizome.
Waterlogging in heavy clay soils during heavy monsoon rains; infected seed rhizomes.
Raised beds (25-30cm high) with good drainage channels; hot water rhizome dip (47°C for 30 mins) before planting.
Water-soaked irregular pale dark green spots on leaf edges turning rapidly purplish-black; white downy mildew fuzz on underside during cool moist mornings; foul rotting smell.
Cool temperatures (10-20°C) with persistent fog, high humidity (>90%), and continuous winter rain.
Certified seed tubers; wide ridge spacing; prevent leaf wetness; avoid overhead sprinkler irrigation.
Water-soaked brownish irregular leaf lesions rapidly turning black; white downy mildew on lower leaf surface in humid mornings; tuber dry rot.
Continuous foggy damp weather with relative humidity above 90% and temperature 10-20°C in high hills and winter Terai.
Use certified healthy seed tubers (e.g. Kufri Jyoti, Janak Dev); high earthing up to protect tubers; destroy volunteer potato plants.
Spindle-shaped diamond eye lesions with grey centers and dark reddish-brown borders on leaves; neck blast causes rotting and breaking of the panicle.
High nitrogen fertilizer application, cloudy wet weather, and cool night temperatures during tillering and heading.
Seed treatment with Tricyclazole at 2g/kg seed; balanced NPK fertilization without excess urea; clean bund weeding.
Irregular water-soaked greasy greenish-black lesions on leaves and stems. Under humid conditions, delicate white fungal down forms on leaf undersides.
Cool, persistent foggy, wet weather (12-20°C, RH > 90%), common during Nepal monsoon and winter morning fogs in Terai/Mid-Hills.
Grow resistant varieties; provide plastic rain shelters (tunnel farming); drip irrigation to keep foliage dry.
Spindle or diamond-shaped lesions with gray/whitish centers and reddish-brown borders on leaves; dark necrotic rotting at panicle neck (Neck Blast) causing empty chaffy heads.
Excessive nitrogen fertilizer over-dosing; high relative humidity (>90%) with cloudy rainy weather; night dew.
Balanced NPK ratio with split nitrogen top-dressing; resistant varieties (Sabitri, Radha-4, Sukha series); seed treatment.
Superficial white powdery talcum-like fungal coating covering upper leaf surfaces, buds, and young stems; leaves turn yellow and curl.
Warm, dry weather combined with shade and high relative humidity at night.
Plant in full direct sunlight; avoid high nitrogen fertilizer over-application which stimulates susceptible lush growth.
Concentric brown to black target-like rings on older lower leaves. Surrounding tissue turns chlorotic yellow, leading to premature leaf drop.
Fungal spores splashing from moist soil during warm (24-29°C), humid weather or frequent overhead irrigation.
Crop rotation with non-solanaceous crops for 3 years; mulch around base to prevent soil splash; maintain proper plant spacing.
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