Integrated action agrainstradical rotting of papaya fruits (Phytophthora sp.) under nursery conditions.
DOI:
https://doi.org/10.15517/am.v9i1.24645Abstract
The effect of several strategies - alone and integrated - on the control of the Phytophthora sp. fungae, which causes radical rotting of papaya fruits, was evaluated under nursery conditions. The experiment took place between August 1994 and March 1995 at the University of Costa Rica's Estación Experimental Fabio Baudrit, located in Alajuela, Costa Rica. The treatments applied were: sun heat for 30 days; organic fertilizer made from hen droppings; etridiazole fungicide; and the following combinations: sun heat + etridiazole + organic fertilizer; etridiazole + organic fertilizer; sun heat + etridiazole; sun heat + etridiazole + organic fertilizer, and finally, an inoculated control treatment. Soil rows were made, and then they were innoculated with the pathogenic agent, and finally the aforementioned treatments were applied. The treated soils were bagged separately. The Solo Sunrise Hawaiian variety was planted in bags. The percentage of gerrnination, stem diameter at soillevel, plant height, radical system fresh weight, and severity of radical rotting were evaluated three months later. In addition, the effect of the treatments on beneficent soil microorganism populations (actinomyces, protozoa, bacteria, and fungi) was evaluated, as well as those of pathogenic populations. Organic fertilizer increased plant strength. All treatments affected germination; the innoculated control had the greatest germination percentage. Treatments containing organic fertilizer affected germination most.
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References
ALEXANDER, M. 1977. Introduction to soil Microbiology. 2 ed . New York, U.S.A., Editorial Wiley, 467 p,
CORRALES, A. 1989. Efecto de la materia orgánica en el combate de la pudrición basal del chile dulce (Capsicum annum L.) causada por Phytophthora capsici L. Tesis Lic., Facultad de Agronomía, Universidad de Costa Rica, San José, Costa Rica.
ERWIN, D.e.; BARTNICKI-GARCIA, S. 1983. Phytophthora sp.: Its biology, taxonomy, ecology and pathology. APS-Press, U.S.A., 392 p.
HERRERA, W. 1986. Clima de Costa Rica. In: Vegetación y clima de Costa Rica, Tomo 2. Ed por L.D.Gómez. San José, Editorial UNED.
HOITINK, H.A. 1976. Survival of some plant pathogens during composting of harwood tree bark. Phytopathology 66: 1369-1372.
HUBER, D.M.; WATSON, R.D. 1970. Effect of organic amendment on soil-borne plant pathogens. Phytopathology 60 : 22-26.
KATAN, 1.1980. Solar pasteurization of soils for disease control: status and prospects. Plant disease 64(5):450-454.
KATAN, 1.; GREENBERGER, A.; ALON, H; GRINSTEIN, A. 1976. Solar heating by polythylene mulching for the control of disease caused by soil-borne pathogens. Phytopathology 66:683 -688.
MADRIZ, M. 1987. Combate integrado del mal del talluelo causado por Fusarium sp. y Rhyzoctonia sp. en semilleros de café mediante el calentamiento solar del suelo y el antagonismo de Trichoderma harzianum. Tesis Lic., Facultad de Agronomía, Universidad de Costa Rica, San José, Costa Rica. 82p.
MESEN, R. 1987. Combate integrado de R. solani con calentamiento solar al suelo y el antagonista T. harzianum en coliflor (Brassica olereaceas var. Botritis). Tesis Lic. Facultad de Agronomía, Universidad de Costa Rica, San José, Costa Rica. 47p.
MORA, D.: MORALES, F. 1980. Etiología de la pudrición radical de la papaya en Costa Rica. Agronomía Costarricense 4 (2): 191-193.
NAVARRO, J.R.; MORA, D. ;DIAZ,J.; VILCHEZ, H.; CORRALES, E. 1991. Efecto de la solarización del suelo sobre la población de malezas y del hongo Rhizoctonia solani, durante la estación lluviosa en Alajuela, Costa Rica. Agronomía Costarricense 15 (1-2): 93-98.
NESSBITT, H.J.; MALAJCZUK, N.; GLENN, A.R. 1979. Effect of organic matter on the survival of Phytophthora cinnamomi in soil. Soil Biol. Biochem. 11: 133-136.
PINKAS, Y.; KARIV, A.; KATAN, J. 1984. Soil solarization for the control of Phytophthora cinnamomi, thermal and biological effects. Phytopathology 74: 796.
WHEELER, J.E.; HINE, R.B.; BOYLER, A.M. 1970. Comparative activity of Dexon and Terrazole against Phytophthora sp. and Pythium sp. Phytopathology 60:561-562.
ZENTMYER, G.A. 1963. Biological control of Phytophthora root rot of avocado with alfalfa meal. Phytopathology 53: 1383-1387.
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