Stylar end rot of the guava fruit (Psidium guayava linn)
- 35 Downloads
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.
KeywordsCitrus Fruit Pathogenicity Test Guava Fruit Diseased Fruit Mercuric Chloride Solution
Unable to display preview. Download preview PDF.
- 1.Brown, N. A... “Tumors on Elm and Maple trees,”Phytopathology, 1941,31, 541–48.Google Scholar
- *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
- 4.Das Gupta, S. N. and Rai, J. N. “Witl diseases of Guava,”Curr. Sci., 1947,16, 257–58.Google Scholar
- *5.Fawcett, H. S... “Stem end rot of Citrus fruit (Phomopsis sp.),”Florida Agr. Expt. Sta. Bull., 1911,107, 23.Google Scholar
- 6.—————.. “The cause of Stem end rot of Citrus fruits (Phomopsis citri n. sp.),”Phytopathology, 1912,2, 109–13.Google Scholar
- 7.----- ..Citrus Diseases and Their Control. McGraw-Hill Publications, 1936, p. 440–55.Google Scholar
- *8.—————.. “Citrus diseases of Florida and Cuba compared with those of California,”California Agr. Exp. Sta. Bul., 1915,20, 261.Google Scholar
- 9.Hildebrand, E. M... “Stem end rot fungi attacking immature Citrus fruits,”Phytopathology, 1947,37, 433.Google Scholar
- *10.Martyn, E. B. .. “Sun crack of guava,”Div. Rept. Dept. Agric. Brit. Guiana, 1934, p. 105–08.Google Scholar
- *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.Narsimham, M. J. .. “Pestalozia psidii on guava,”Adm. Rept. Agric. Dept. Mysore, 1936–37, pp. 169–73.Google Scholar
- *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.Rai, J. N... “Internal breakdown of guava fruit (Psidium guayava L.),”Curr. Sci., 1948,17, 273–74.Google Scholar
- 15.Ruehle, G. D... “Algal leaf and fruit spot of guava,”Phytopathology, 1941,31, (1), 195–96.Google Scholar
- 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.Schnellhardt, O. and Heald, F. D. “Pathogenicity tests withBotrytis species,”Phytopathology, 1936,26, 786–94.Google Scholar
- 18.Seth, L. N... “Studies in the generaCytosporina, Phomopsis andDiaporthe, V,”Ann. Bot., 1934,189, 69–107.Google Scholar
- 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.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.Walter, H. J... “APhomopsis disease of Tomatoes in Hawaii,”Phytopathology, 1950,40, 966.Google Scholar
- 23.Bombay Agricultural Department Bulletin No. 176, 1934.Google Scholar