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AgroMitra Plant Doctor

बिरुवा डाक्टर
Disease & Pest Identification Library

बिरुवाका रोग किरा पहिचान गरी सही उपचार विधि अपनाउनुहोस्।
Identify fungal, bacterial, viral diseases and pests with organic and chemical treatments.

Showing 4 conditions in Pest / Insect
🐛
Fatal
Fall Armyworm in Maize
मकैको अमेरिकी फौजी किरा
📖 Spodoptera frugiperda
🐛 Pest / Insect (किरा र फट्याङ्ग)
🔍 Symptoms / लक्षणहरू

Extensive ragged skeletonized holes on young leaves; heavy sawdust-like moist brown frass packed deep inside the leaf whorl; severed growing tips.

⚡ Causes / कारण

Invasive migratory pest across Nepal; rapid multi-generation lifecycle thriving in warm maize planting seasons.

🛡️ Prevention / रोकथाम

Deep winter tillage to expose pupae to birds; push-pull intercropping with Desmodium; pheromone traps (5/ropani).

🌿 Organic Treatment / जैविक उपचार
Direct whorl application of dry sand mixed with wood ash and chili powder (5:1 ratio); Bacillus thuringiensis (Bt) spray (2g/L).
⚗️ Chemical Treatment / रासायनिक उपचार
Emamectin Benzoate 5% SG (0.4g/L) or Chlorantraniliprole 18.5% SC directed into leaf whorls.
🐛
Fatal
Maize Fall Armyworm
मकैको अमेरिकी फौजी किरा
📖 Spodoptera frugiperda
🐛 Pest / Insect (किरा र फट्याङ्ग)
🔍 Symptoms / लक्षणहरू

Ragged window-pane feeding holes in whorl leaves; massive piles of sawdust-like frass (droppings) inside the central whorl; destroyed tassels.

⚡ Causes / कारण

Migratory nocturnal moth laying egg clusters covered in beige scales on leaf surfaces; rapid multi-generation infestation.

🛡️ Prevention / रोकथाम

Intercropping with pulses (cowpea, soybean); early planting; pheromone traps (FAW lure) for early detection.

🌿 Organic Treatment / जैविक उपचार
Apply dry wood ash or fine sand mixed with lime directly into the central leaf whorl; Bacillus thuringiensis (Bt) spray (2g/L).
⚗️ Chemical Treatment / रासायनिक उपचार
Emamectin Benzoate 5% SG (0.4g/L water) or Spinetoram 11.7% SC (0.5ml/L) targeted into the whorl.
🐛
Severe
Tomato Fruit Borer
टमाटरको फलमा लाग्ने पुतली किरा
📖 Helicoverpa armigera
🐛 Pest / Insect (किरा र फट्याङ्ग)
🔍 Symptoms / लक्षणहरू

Circular entry holes bored into green and ripening fruits; internal flesh eaten out, filled with droppings, leading to secondary bacterial soft rot.

⚡ Causes / कारण

Moths laying solitary yellow-white eggs on tender leaves and flowers during flowering and fruiting flushes.

🛡️ Prevention / रोकथाम

Marigold (हजारी फूल) trap cropping (1 row marigold for every 10-15 rows tomato); Helilure pheromone traps.

🌿 Organic Treatment / जैविक उपचार
HaNPV (Helicoverpa nuclear polyhedrosis virus) spray at 250 LE/ha; Neem oil spray (5ml/L); release of Trichogramma egg parasitoids.
⚗️ Chemical Treatment / रासायनिक उपचार
Chlorantraniliprole 18.5% SC (Coragen at 0.3ml/L) or Flubendiamide 39.35% SC (0.3ml/L).
🐛
Moderate
Aphids / Plant Lice
लाही किरा
📖 Aphis gossypii / Brevicoryne brassicae
🐛 Pest / Insect (किरा र फट्याङ्ग)
🔍 Symptoms / लक्षणहरू

Clusters of tiny soft-bodied green or black insects colonizing leaf undersides and shoot tips; curled wrinkled leaves and sticky black sooty mold.

⚡ Causes / कारण

Rapid reproductive multiplication in mild dry weather; excessive nitrogen fertilizer attracting succulent feeder sap.

🛡️ Prevention / रोकथाम

Yellow sticky traps placed 30cm above crop canopy; encourage natural predators like ladybird beetles.

🌿 Organic Treatment / जैविक उपचार
Traditional fermented cow urine (गोमूत्र) diluted 1:6 in water with wood ash; or Neem oil spray (3-5ml/L + soap).
⚗️ Chemical Treatment / रासायनिक उपचार
Imidacloprid 17.8% SL (0.5ml per liter) or Acetamiprid 20% SP.

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