Plant Diseases

Last updated May 26, 2023 Edit

• Biology
• Disease

• Direct contact between plants

• Via soil or vectors such as air
• Pathogens may survive in soil and affect future plants (soil contamination)
• Additional vectors include:
  • Wind
  • Water (raindrops, splashes etc)
  • Animals, insects and birds
  • Humans, hands, clothing and tools

Caused by: Clavibacter Michiganensis Pathogen: Bacteria Transmission: Remains in soil, infects tubers and roots Transmission Type: Indirect Transmission Factors: Plants in soil, soil conditions

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Caused by: Tobacco Mosaic Virus Pathogen: Virus Transmission: Mechanical, touch, contact. Transmission Type: Direct & Indirect Transmission Factors: Climate, contact frequency

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Caused by: Phytophthora infestans Pathogen: Protist Transmission: Wind, Water Transmission Type: Indirect Transmission Factors: Wind, rainfall

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Caused by: Mycosphaerella Fijensis Pathogen: Fungi Transmission: Spores, Extended Contact Transmission Type: Direct & Indirect Transmission Factors: Wind, Rain

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• Some varieties of crops are more susceptible than others
• Overcrowding
• Poor mineral nutrition reduces diseases resistance
• Damp, warm conditions increase spread of pathogens
• Climate change

Disease