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Pomegranate Diseases

Bacterial leaf and fruit spot

Disease symptoms:

  • Appearance of one to several small water soaked, dark colored irregular spots on leaves resulting in premature defoliation under severe cases.
  • The pathogen also infects stem and branches causing girdling and cracking symptoms.
  • Spots on fruits were dark brown irregular slightly raised with oily appearance, which split open with L-shaped cracks under severe cases.

Pomegranate Bacterial leaf and fruit spot

Survival and spread:

  • Primary source of inoculum is Infected cuttings
  • Secondary source of inoculum spreads through Wind splashed rains.

Favourable conditions:

  • The increase in day temperature (38.6°C) and afternoon relative humidity of 30.4% along with cloudy weather and intermittent rainfall favored the disease initiation and further spread of the disease.

Leaf and fruit spot

Disease symptoms:

  • Leaf spots are minute, brown with yellow halo.
  • Spots are scattered, circular or irregular and become dark brown with age.
  • Spots on lower side are sunken with clusters of spore bearing structures hence greyish in colour.
  • Minute, circular, black spots appear on sepals of the flower.
  • Fruit spots are black, minute and circular on rind.
  • When grow old, become large, irregularly circular and depressed presenting an ugly look to the fruits.

Pomegranate Leaf and fruit spot

Favourable conditions:

  • Optimum temperature is 25-32°C with night temperatures above 16°C, and a relative humidity of 90-95%.

Survival and spread:

  • Primary spread : Diseased plant debris
  • Secondary spread : Wind borne conidia

Anthracnose

Disease Symptoms:

  • Small, regular to irregular black spots on leaves, calyx region and fruits which turn later on as dark brown depressed spots.
  • Infected leaves turn yellow and drop off.

Pomegranate Anthracnose

Survival and spread:

  • Primary source of inoculum: Infected leaves
  • Secondary source of inoculum: windborne conidia.

Favourable conditions:

  • The disease is severe during August-September when there is high humidity, and the temperature  between 20-27ºC.

Fusarium wilt

Disease symptoms:

  • Affected plants show yellowing of leaves in some twigs or branches, followed by drooping and drying of leaves.
  • The entire tree dies in few months or a year.
  • When affected tree is cut open lengthwise or cross-section dark grayish-brown discolouration of wood is seen.

Pomegranate Fusarium wilt

IPM for Pomegranate

To know the IPM practices for Pomegranate, click here.

Source : NIPHM, Directorate of Plant Protection, Quarantine & Storage



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