Disease management :

Fruit Rot  -   (Phytophthora nicotianae var parasitica Dastur)

Symptoms: The infection starts as circular brownish spots at styler end as well as on the fruits. Whitish cottony growth develops very fast as the fruits ripens and cover almost the entire surface with in a period of about 3-4 days during humid weather. Peduncle and fruits become soft and the colour of the fruit changes from light brown to dark brown, emitting a characteristic unpleasant odour. Incipient infection on fruits leads to rotting during storage.

Epidemiology: High relative humidity > 70% and temperature in the range of 20-27.5 °C are very conducive for the disease. The rain fall spread over a period is more congenial than the total amount of rains for the disease progression

Management: The disease can be effectively controlled through the sprays of Al phosphonate (Aliette 0.2%) + Indofil Dithane M-45 (0.2%) or Phosphonic acid (Phytoalexin (0.3%) or Akomin (0.3%) when spryed at fortnightly intervals. The removal and detruction of diseased fruit is the foremost important.

 

 

 



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