Main Plant Diseases Notes with PDF
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Infectious Plant Diseases (Caused by Pathogens)
Viral Diseases
- Tungro Virus
- Host Crop: Rice
- Transmission: Green leafhoppers
- Yellow Vein Mosaic
- Host Crop: Okra and brinjal
- Note: A serious disease
- General Fact: Viruses can infect a wide range of hosts, including bacteria, fungi, and plants.
Fungal Diseases
- White Rust
- Host Crop: Mustard
- Late Blight
- Host Crop: Potato
- Powdery Mildew
- Host Crops: Pea and sugarcane
- Ergot
- Host Crop: Bajra (Pearl millet)
- Diseases of Wheat
- Karnal Bunt
- Smut
- Black Rust
Pest-Related Issues
- Pyrilla
- Host Crop: Sugarcane
- Note: Classified as a major pest, not a pathogen-based disease.
Nutrient Deficiency Disorders in Plants
Zinc Deficiency
- General Symptom: Chlorosis (yellowing) in plants.
- Specific Manifestations:
- In Maize: Causes “White Bud” disease and white tips on leaves.
Other Deficiencies
- Boron Deficiency
- Disorder: Causes “Blackheart” in potatoes.
- Manganese Deficiency
- Symptom: Can cause chlorosis.
Physical & Physiological Disorders
- Spongy Tissue
- Host: Alphonso variety of mango.
- Impact: A serious physiological disorder that hampers export.
- Blackheart in Potatoes
- Cause: It can also be caused by oxygen deficiency (a physiological disorder).
Transmission of Plant Diseases
- Plant diseases can be spread by multiple agents, including:
- Birds
- Wind
- Dust
- Rain
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