High-Frequency Crop Diseases & Pathogen Table
Pathology questions test precise scientific names of causal pathogens, survival mechanisms, and selective fungicide chemistries.
| Crop & Disease | Causal Organism & Group | Diagnostic Symptom | Control Formulation |
|---|---|---|---|
| Paddy Blast | Magnaporthe oryzae (Pyricularia oryzae) | Eye-shaped or spindle spots on leaves; neck rot | Tricyclazole 75 WP @ 0.6 g/L or Isoprothiolane |
| Potato Late Blight | Phytophthora infestans (Oomycete) | Water-soaked brown lesions with white mildew beneath | Metalaxyl + Mancozeb (Ridomil MZ) @ 2.5 g/L |
| Wheat Black Stem Rust | Puccinia graminis tritici (Basidiomycete) | Reddish-brown elongated pustules on stems and sheaths | Propiconazole 25 EC (Tilt) @ 1 ml/L |
| Pigeonpea Wilt | Fusarium oxysporum f. sp. udum | Vascular browning and drooping of foliage | Seed treatment with Trichoderma viride @ 4 g/kg |
| Crucifer Clubroot | Plasmodiophora brassicae (Plasmodiophoromycete) | Club-shaped root galls in acidic soils | Soil liming to raise pH above 7.2 |
Bordeaux Mixture & Modern Systemic Fungicide Basics
Bordeaux mixture was discovered by P. M. A. Millardet in 1885 in France for controlling Downy Mildew of grapes (Plasmopara viticola). Standard composition is 5:5:50 (5 lbs Copper Sulphate : 5 lbs Slaked Lime : 50 gallons Water).
RECOMMENDED PRACTICE BUNDLE
AGRI-KATYAYAN
Fundamentals of Agriculture by Arun Katyayan sir – 25+1 Complimentary Set
₹196₹260
26 curated test sets (25 structured practice + 1 complimentary bonus set) with 2,600 MCQs comprehensively covering essential agricultural concepts.
26 CBT Tests60 hours60 days validity
FREE CBT PRACTICE TEST
Attempt Free 104-Question Agriculture CBT Demo Exam
Experience real NTA/ASRB exam conditions: 90-minute live countdown timer, 104-question status palette, and instant answer keys with verified scientific explanations.