Stylar end rot of the guava fruit (Psidium guayava linn)

  • J. N. Rai


The paper deals with investigations on the stylar end rot of guava fruits. Fruits in the orchard as well as in storage suffer with this disease, which is, however, of rare occurrence. The symptoms of the disease have been described in detail.

A species ofPhomopsis was constantly associated with this rot and later pathogenicity tests proved this fungus to be the causal organism.

While some infection was obtained through uninjured surface, injury favoured infection. Apart from stylar end rot the fungus was able to cause fruit rot in general.

The morphology of the fungus has been described and its temperature relationship has been studied. The fungus had a minimum temperature for growth near 10° C., an optimum near 25° C. and a maximum of about 35° C.


Citrus Fruit Pathogenicity Test Guava Fruit Diseased Fruit Mercuric Chloride Solution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Literature Cited

  1. 1.
    Brown, N. A... “Tumors on Elm and Maple trees,”Phytopathology, 1941,31, 541–48.Google Scholar
  2. *2.
    Baker, R. E. D... “Notes on diseases and fruit rots of tomatoes in the British West Indies,”Trop. Agriculture Trin., 1939,16 (11), 252–57 (Abst. Rev. Appl. Myc., 1940,19, 170).Google Scholar
  3. 3.
    Chardon, C. E., Miller, J. H. and Muller, A. S. “Phyllachora tropicalis on guava,”Mycologia, 1942,32 (2), 172–204.CrossRefGoogle Scholar
  4. 4.
    Das Gupta, S. N. and Rai, J. N. “Witl diseases of Guava,”Curr. Sci., 1947,16, 257–58.Google Scholar
  5. *5.
    Fawcett, H. S... “Stem end rot of Citrus fruit (Phomopsis sp.),”Florida Agr. Expt. Sta. Bull., 1911,107, 23.Google Scholar
  6. 6.
    —————.. “The cause of Stem end rot of Citrus fruits (Phomopsis citri n. sp.),”Phytopathology, 1912,2, 109–13.Google Scholar
  7. 7.
    ----- ..Citrus Diseases and Their Control. McGraw-Hill Publications, 1936, p. 440–55.Google Scholar
  8. *8.
    —————.. “Citrus diseases of Florida and Cuba compared with those of California,”California Agr. Exp. Sta. Bul., 1915,20, 261.Google Scholar
  9. 9.
    Hildebrand, E. M... “Stem end rot fungi attacking immature Citrus fruits,”Phytopathology, 1947,37, 433.Google Scholar
  10. *10.
    Martyn, E. B. .. “Sun crack of guava,”Div. Rept. Dept. Agric. Brit. Guiana, 1934, p. 105–08.Google Scholar
  11. *11.
    Macleod, H. S. .. “A new stem end rot of potato,”Canadian Journal of Research, 1932, p. 520–23 (Abst. Rev. Appl. Myc., 1933,12, 241).Google Scholar
  12. *12.
    Narsimham, M. J. .. “Pestalozia psidii on guava,”Adm. Rept. Agric. Dept. Mysore, 1936–37, pp. 169–73.Google Scholar
  13. *13.
    Palo, M. A... “Notes on mottle leaf and anthracnose fruit spot ofCitrus in Bukiduon,”Philipp. J. Agric., 1935,6, 497–500.Google Scholar
  14. 14.
    Rai, J. N... “Internal breakdown of guava fruit (Psidium guayava L.),”Curr. Sci., 1948,17, 273–74.Google Scholar
  15. 15.
    Ruehle, G. D... “Algal leaf and fruit spot of guava,”Phytopathology, 1941,31, (1), 195–96.Google Scholar
  16. 16.
    Savastano, G. and Fawcett, H. S. “A study of decay in Citrus fruits produced by inoculation with known mixtures of fungi at different constant temperatures,”Journ. Agr. Res., 1923,39, 163–98.Google Scholar
  17. 17.
    Schnellhardt, O. and Heald, F. D. “Pathogenicity tests withBotrytis species,”Phytopathology, 1936,26, 786–94.Google Scholar
  18. 18.
    Seth, L. N... “Studies in the generaCytosporina, Phomopsis andDiaporthe, V,”Ann. Bot., 1934,189, 69–107.Google Scholar
  19. 19.
    Tandon, R. N. and Agarwala, R. K. “Pathological studies ofGlœosporium psidii causing die back of guavas,”Proc. Ind. Acad. Sci., 1955,40, 102–09.Google Scholar
  20. 20.
    Uppal, B. N... “Physalospora psidii on Guava, a serious disease of guava in Bombay,”Int. Bull. Pl. Bot., 1936,10 (5), 99.Google Scholar
  21. 21.
    Walter, H. J... “APhomopsis disease of Tomatoes in Hawaii,”Phytopathology, 1950,40, 966.Google Scholar
  22. *22.
    Wollenweber, H. W. and Hochapfel, H. “Beitrage Zur Kenntnis parasitarer and sprophytischer Pilze, 1. Phomopsis, Dendrophoma, Phoma und Ascochyta und ihre Bezichung zur Frachtfaule,”Z. Parasitenk, 19368 (5), 561–605 (Abst. Rev. Appl. Myc., 1937,16, 105–06).CrossRefGoogle Scholar
  23. 23.
    Bombay Agricultural Department Bulletin No. 176, 1934.Google Scholar

Copyright information

© Indian Academy of Sciences 1956

Authors and Affiliations

  • J. N. Rai
    • 1
  1. 1.Department of BotanyLucknow UniversityLucknow

Personalised recommendations