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Fungicidal control of Rhizoctonia solani in relation to soil texture, organic matter and clay minerals
Author(s) -
KATARIA H. R.,
SUNDER S.
Publication year - 1987
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1987.tb03231.x
Subject(s) - rhizoctonia solani , loam , fungicide , agronomy , biology , carbendazim , manure , soil conditioner , horticulture , soil water , ecology
SUMMARY In pot tests, MEMC, quintozene, captafol, carboxin, thiabendazole, carbendazim, benomyl and thiophanate‐methyl used as seed treatments gave much better control of cowpea seedling rot in light‐textured sandy and loamy sand soils than in heavy‐textured loam and silt loam soils inoculated with Rhizoctonia solani. Disease control by chloroneb was not altered by soil texture. Amendment of sandy soil with montmorillonite reduced disease control with all fungicides, except chloroneb and carboxin; similar amendments with kaolinite decreased efficacy of MEMC and captafol. Green manuring with cluster bean reduced disease control by MEMC, captafol, benomyl and thiophanate‐methyl; sunnhemp reduced efficacy of MEMC. Most fungicides gave poor disease control when farm yard manure or biogas sludge was added to soil, the sludge having the more marked effect. All the fungicides tested, except carboxin, were inactivated to different extents by humic acid extracted from farm yard manure.