Late blight of tomato

  • first appears of  Late blight on the lower, older leaves as water-soaked, grey-green spots. 
  • As the disease matures, these spots darken and a white fungal growth forms on the undersides. Eventually, the entire plant will become infected. 
  • Crops can be severely damaged.
  • The disease spreads quickly in fields and can result in total crop failure if untreated

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Control of late blight of tomato

  • Destroy all tomato debris after harvest.
  • avoid water logging conditions on the farm.
  • Spare any one fungicide for disease control. 
  • Metalaxyl 8%+Mancozeb 64% @ 500 gm/acre.
  • Kasugamycin 5% + Copper Oxychloride 45% WP @ 300 gm/acre.
  • Pyraclostrobin 5% + Metiram 55% @ 600 gm /acre.
  • Dimethomorph 50% WP @ 400 gm/acre.

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Late blight of tomato

  • first appears of  Late blight on the lower, older leaves as water-soaked, grey-green spots. 
  • As the disease matures, these spots darken and a white fungal growth forms on the undersides. Eventually, the entire plant will become infected. 
  • Crops can be severely damaged.
  • The disease spreads quickly in fields and can result in total crop failure if untreated

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Share

Control of late blight of tomato

  • Destroy all tomato debris after harvest.
  • avoid water logging condition on the farm.
  • Spare any one fungicide for disease control. 
  • Metalaxyl 8%+Mancozeb 64% @ 500 gm/acre.
  • Kasugamycin 5% + Copper Oxychloride 45% WP @ 300 gm/acre.
  • Pyraclostrobin 5% + Metiram 55% @ 600 gm /acre.
  • Dimethomorph 50% WP @ 400 gm/acre.

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Late blight of tomato

  • first appears of  Late blight on the lower, older leaves as water-soaked, grey-green spots. 
  • As the disease matures, these spots darken and a white fungal growth forms on the undersides. Eventually, the entire plant will become infected. 
  • Crops can be severely damaged.
  • The disease spreads quickly in fields and can result in total crop failure if untreated

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Management of Late blight in Potato

Management Late blight in Potato

  • Late blight is the major disease in Potato crop.
  • This disease is caused by a fungus called Phytophthora infestans.
  • This disease damages leaves, stems and tubers. The disease first appears as water soaked, light brown lesions on the leaf blade.
  • The lesions turn dark brown, dry and brittle after the infected leaf tissues die. In humid atmosphere, the growth of the fungus can be seen on lower side of these spots as whitish cottony growth.
  • The spots turn black as the affected leaves start rotting. Severe infections cause all foliage to rot, dry out and fall to the ground, stems to dry out and plants to die.
  • The tubers under the ground also decay before harvest. On tubers, greenish sunken areas may be seen.
  • To control Late blight of potato, spraying of Mancozeb 75% WP@ 50 Gm/ 15 litre water or Copper oxychloride 50% WP @ 50 Gm/15 litre water or Metalaxy + Mancozeb @ 50 Gm/ 15 Litre water should be done.

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Control of Late Blight in Tomato

Control of Late Blight in Tomato:-

  • Disease occurs on the foliage at any stage of growth.
  • Brown to purple black lesions occurs in the leaflets, petioles, fruit and stem.
  • At later stage, plants die.
  • The disease appears on low temperature and high humidity.

Control :-

  • Fungicidal sprays on the appearance of initial symptoms.
  • Spraying should be done with Mancozeb 75% WP @ 400 Gm/ Acre or Propineb 70% WP 400 Gm/Acre or Chlorothalonil 75% WP @ 300 Gm/Acre.
  • Spraying should be repeated at 10-12 days interval.

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