University of California

Epidemiology of stem rot disease of rice: Effects of burning vs. soil incorporation of rice residue


R. K. Webster
C. M. Wick
D. M. Brandon
D. H. Hall
J. Bolstad

Authors Affiliations

R. K. Webster was Professor, Plant Pathology, and Plant Pathologist in the Experiment Station, Davis; C. M. Wick was Farm Advisor, Butte County; D. M. Brandon was formerly Agronomist, Cooperative Extension, is with the Louisiana State Rice Experiment Station, Crowley, Louisiana; D. H. Hall was Plant Pathologist, Cooperative Extension, and Plant Pathologist in the Experiment Station, Davis; J. Bolstad was Staff Research Associate, Department of Plant Pathology, Davis.

Publication Information

Hilgardia 49(3):1-12. DOI:10.3733/hilg.v49n03p012. February 1981.

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Sclerotium oryzae, the cause of stem rot of rice, overwinters as sclerotia either free in the soil or in association with rice residue. When residues were incorporated in soil rather than burned, S. oryzae inoculum levels increased, stem rot severity increased, and yields decreased. Inoculum levels remained nearly constant where residues were burned. Under the conditions of this study, the incorporation of residue did not affect rice yield by altering nutrient availability. It was concluded that burning of residue is beneficial in minimizing severity of stem rot disease in areas where it is a problem, and further, that open-field burning is effective in minimizing the buildup of S. oryzae where it presently occurs at inconsequential levels.

Literature Cited

Bockus W. W., Webster R. K., Kosuge T. The competitive saprophytic ability of Sclerotium oryzae derived from sclerotia. Phytopathology. 1978. 68:417-21.

Bockus W. W., Webster R. K. Decline in sclerotial numbers and inoculum potential of Sclerotium oryzae in field soil. Phytopathology. 1979. 69:389-92.

Bockus W. W., Webster R. K., Wick C. M., Jackson L. F. Effects of various methods of rice residue disposal on overwintering inoculum level of Sclerotium oryzae. Phytopathology 69: 862:65 1979.

Butler E. J. Diseases of rice. Agric. Res. Inst. (Pusa) Bull. 1913. 34:1-37.

Johnson C. M., Ulrich A. Analytical methods for use in plant analysis. Calif. Agric. Exp. Stn. Bull. 1959. 766:25-28.

Keim R., Webster R. K. Nitrogen fertilization and severity of stem rot of rice. Phytopathology. 1974a. 64:178-83.

Keim R., Webster R. K. Effect of soil moisture and temperature on viability of sclerotia of Sclerotium oryzae. Phytopathology. 1974b. 64:1499-1502.

Keim R., Webster R. K. Fungistasis of sclerotia of Sclerotium oryzae. Phytopathology. 1975. 65:283-87.

Krause R. A., Webster R. K. The morphology, taxonomy, and sexuality of the rice stem rot fungus, Magnaporthe salvinii (Leptosphaeria salvinii). Mycologia. 1972a. 64:103-114.

Keim R., Webster R. K. Sclerotial production, viability determination and quantitative recovery of Sclerotium oryzae from soil. Mycologia. 1972b. 64:1333-1337.

Keim R., Webster R. K. Stem rot of rice in California. Phytopathology. 1973. 63:518-23.

Lindt J. H. California rice growing. Calif. Agric. Ext. Serv. OSA. 1966. 186:2

Mikkelsen D. S., Lindt J. H. JR., Miller M. D. Rice fertilization. Univ. of Calif. Div. Agric. Sci. Leaf. 1967. 96:8 rev DOI: 10.2134/agronj1957.00021962004900060005x [CrossRef]

Mikkelsen D. S., Hunziker R. R. A plant analysis survey of California rice. Agrichem. Age. 1971. 14(6):18-22.

Miyake I. Studien uber die Pilze der Reispflanze in Japan. J. Coll. Agric, Imp. Univ., Tokyo. 1910. 2:237-76.

Ou S. H. Rice diseases. 1972. Kew, Surrey, England: Common wealth Mycological Institute. 368p. DOI: 10.1146/annurev.phyto.22.1.1 [CrossRef]

Park M., Bertus L. S. Sclerotial diseases of rice in Ceylon. II. Sclerotium oryzae Catt. Ceylon J. Sci., Sect. A. Bot. (Ann. Roy. Bot. Gdns., Peradeniya). 1932. 11:343-59.

Shaw F.J. F. A sclerotial disease of rice. Indian Dept. Agric. Mem. Bot. Ser. 1913. 6:11-23.

Teodora N. G., Bogayong J. R. Rice diseases and their control. Phillipp. Agric. Rev. 1926. 19:237-41.

Webster R. K. Relationship between inoculum level, disease severity and yield reduction in stem rot of rice. Proc. Am. Phytopath. Soc. 1974. 1:106-07.

Webster R. K., Bolstad J., Wick C. M., Hall D. H. Vertical distribution and survival of Sclerotium oryzae under various tillage methods. Phytopathology. 1976. 66:97-101.

Webster R. K., Hall D. H., Wick C. M., Krause R. A. Distribution and occurrence of Sclerotium oryzae on rice in California. Plant Dis. Rep. 1971. 55:757-59.

Williams W. A., Morse M. D., Ruckman J. E. Burning vs. incorporation of rice crop residues. Agronomy J. 1972. 64:467-68.

Webster R, Wick C, Brandon D, Hall D, Bolstad J. 1981. Epidemiology of stem rot disease of rice: Effects of burning vs. soil incorporation of rice residue. Hilgardia 49(3):1-12. DOI:10.3733/hilg.v49n03p012
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