Disease management :

LEAF SPOT (Cercospora psidii Swada):

Symptoms: The affected leaves show scattered yellowish spots measuring up to 1.0 mm in diameter on the upper surface of leaf. On the lower surface irregular water soaked brownish spots are seen. Leaves are curled and subsequently dropoff. Generally the older leaves get severe infection.

Epidemiology: Disease is severe during December to February months when weather is relatively dry. Management: The disease is effectively controlled through the sprays of Carbendazim (Bavistin 0.1%) or Thiophanate methyl (Topsin M or Roko 0.1%).

 

 

Epidemiology: Disease is severe during December to February months when weather is relatively dry.

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Epidemiology: Disease is severe during December to February months when weather is relatively dry.

Epidemiology: Disease is severe during December to February months when weather is relatively dry.

Disease is severe during December to February months when weather is relatively dry.

Management: The disease is effectively controlled through the sprays of Carbendazim (Bavistin 0.1%) or Thiophanate methyl (Topsin M or Roko 0.1%).

 

Epidemiology: The disease is mostly favoured by high humidity. During moist weather profuse production of acervuli is noticed on dead parts of twigs and the spores come out as a pinkish mass. These are further disseminated by rain or wind and cause fresh infection. The disease develops more rapidly on the ripe fruits and maximum spreads takes place at 30 °C and relative humidity of 96%.

Management: Sprayings of Bordeaux mixture (3:3:50) or Copper oxychloride (Blitox 0.2%) at weekly intervals starting from the month of July manage the disease. Among systemic fungicides Carbendazim (Bavistin 0.1%) or Thiophanate methyl (Topsin M or Roko 0.1%) provide effective disease control.

 

 



Guava general information

Guava (Psidium guajava L) of the myrtle family (Myrtaceae), is the fifth most widely grown fruit crop in India after banana, mango, citrus and papaya. The fruit has gained considerable prominence in India due to its high nutritive value, moderate prices, pleasant aroma and good flavour. Guava is a rich source of vitamin C and pectin and moderate source of B vitamins, calcium, iron and phosphorus. It is one of the commonest fresh fruits liked by the rich and the poor alike and is popularly known as the ‘apple of tropics’ or `poor man’s apple’. Only a small quantity of the production is utilized for processing in the form of jelly, canned cups, juice and nectar, cheese, toffee bar, powder, flakes and strained baby foods have also been prepared besides commercial pectin.

Contact us.

  • ICAR - IIHR.
  • Indian Institute of Horticultural Research, Hessaraghatta Lake post, Bengaluru - 560 089.
  •   Phone +91-80 23686100. website : www.iihr.res.in