Summary
Sclerotial wilt ofpan (Piper betle, Lin.) due toSclerotium rolfsi Sacc. is a serious disease and occurs in villages Purangaon, Phulbari, Faua, Erangabaj and Kumrakapan. The percentage of mortality has been found to vary from 4 to 31 in the different villages.
The syptoms of the disease have been described. The incidence of the disease has been studied and it has been found that the disease appears during the middle or later part of May and continues to be vigorous during the later part of June and whole of July. From the first or second week of August the rate of death of plants gradually falls off and the disease ceases by the first week of September.
Inoculation experiments have been carried out with the pure culture of the fungus and its pathogenicity established. It has been found that the sclerotia fail to infect the plants if they are buried three or more inches deep in the soil. Infection is rapid when the sclerotia lie on the surface or an inch below. Infection is delayed when they are buried two inches deep.
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References
Bertus, L. S.Year Book Agric. Dep. Ceylon, 1927,41.
Chowdhury, S.Proc. Ind. Acad. Sci., 1944,19 B, 152.
Peltier, Geo L.Ill. Agric. Exp. Sta. Bul., 1916,189, 281.
Rolfs, P. H.Flo. Agric. Exp. Sta. Ann. Rept., 1896,38.
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Communicated by Prof. H. Chaudhuri, d.sc., f.a.sc.
Parts I, II and III appeared in Vol. XIX, No. 5 and Part IV in Vol. XX, No. 6 of theProc. of the Indian Acad Sci., Sec. B.
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Chowdhury, S. Diseases ofPan (Piper betle) in Sylhet, Assam. Proc. Indian Acad. Sci. 22, 175–187 (1945). https://doi.org/10.1007/BF03048776
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DOI: https://doi.org/10.1007/BF03048776