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Evaluation of fungal antagonists for grey mould management in early growth of pot roses
Author(s) -
YOHALEM D S
Publication year - 2004
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.1744-7348.2004.tb00311.x
Subject(s) - biology , iprodione , botrytis cinerea , fungicide , trichoderma harzianum , spore , horticulture , biological pest control , trichoderma , botany , toxicology
Summary Several filamentous fungi can reduce disease incidence and suppress sporulation of Botrytis cinerea during early establishment and vegetative growth of pot roses. Two isolates of Ulocladium atrum were the most successful of those fungi tested, were consistently more effective than the fungicide, iprodione and not different from each other. Tween 80, added as a dispersant, had no effect on the efficacy of U. atrum . An isolate of Clonostachys rosea also gave better disease control than iprodione, although not to the levels given by isolates of U. atrum , nor was its behaviour consistent across experiments. Another isolate of C. rosea performed well in one trial, had no discernible effect in a second and was excluded from the third due to poor inoculum quality. Commercial Trichoderma harzianum preparations (Trichodex and Supresivit) failed to reduce disease incidence under the high disease pressure of these experiments, but did reduce sporulation of the pathogen relative to untreated controls.