Late Blight disease

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Overview:

Recently, experts from Punjab Agricultural University (PAU) had cautioned farmers against the late blight disease attack on potato crop.

About Late Blight disease

  • It is caused by the fungus Phytophthora infestans.
  • It is the most important disease of potato that can result in crop failures in a short period if appropriate control measures are not adopted.
  • It is common in humid regions with temperatures.
  • Symptoms
    • The first symptoms of late blight appear as small, light to dark green, circular to irregular-shaped water-soaked spots.
    • During cool, moist weather, these lesions expand rapidly into large, dark brown or black lesions, often appearing greasy. A pale green to yellow border often surrounds the lesions
  • Mode of spread
    • The infected tubers and the infected soil may serve as a source of primary infection.
    • The diseased tubers are mainly responsible for persistence of the disease from crop to crop.
    • The air borne infection is caused by sporangia.
  • This disease can be controlled by the prompt destruction of infected crop residue from the field to prevent the spread of the disease to nearby fields.

Q1) What is Fungi?

Fungi can be single celled or very complex multicellular organisms. They are found in just about any habitat but most live on the land, mainly in soil or on plant material rather than in sea or freshwater.

Source: Full-blown late blight attack damages potato crop in Punjab