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Use of three screening techniques for the evaluation of fungicides to control rhizoctonia root rot of wheat
Author(s) -
COTTERILL P. J.,
BALLINGER D. J.,
KOLLMORGEN J. F.
Publication year - 1989
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.1744-7348.1989.tb03381.x
Subject(s) - rhizoctonia solani , fungicide , rhizoctonia , root rot , biology , benomyl , triadimefon , propiconazole , horticulture , agronomy , damping off , biological pest control
Summary Twenty fungicides were screened for their abilities to reduce the saprophytic growth of Rhizoctonia solani on agar and in soil, and to control root rot of wheat ( Triticum aestivum ) in pots of soil. Thirteen showed some activity against the in vitro growth of R. solani , the most promising being Sandoz 619F and flutolanil, although none of these reduced saprophytic growth of the fungus in soil. Only benomyl and thiabendazole, which were ineffective on agar and against disease in pots, reduced saprophytic growth in soil. None of the fungicides reduced the number of plants infected in the pot experiments and only six (flutriafol, diniconazole, Schering 539865, propiconazole, Bayer HWG1608 and flutolanil) of the thirteen active on agar (+ triadimefon which was not) reduced root rot severity. The results of this study indicate the differing reactions towards R. solani of chemicals in the three screening tests and confirm the potential for chemical control of rhizoctonia root rot of wheat.