Biological Control of Fusarium Crown and Root Rot of Tomato in Florida Using Trichoderma harzianum and Glomus intraradices

Field experiments were conducted to evaluate commercial formulations of two beneficial fungi, Trichoderma harzianum and Glomus intraradices, for the control of Fusarium crown and root rot of tomato, caused by Fusarium oxysporum f. sp. radicis-lycopersici. Tomato seeds cv. "Sunny" were plan...

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Bibliographic Details
Published in:Biological control 1995-09, Vol.5 (3), p.427-431
Main Authors: Datnoff, L.E., Nemec, S., Pernezny, K.
Format: Article
Language:English
Subjects:
AUXILIAIRE DE LUTTE BIOLOGIQUE
BIOLOGICAL CONTROL
BIOLOGICAL CONTROL ORGANISMS
CALIDAD
CONTROL BIOLOGICO
CONTROL DE ENFERMEDADES
CONTROLE DE MALADIES
CROP YIELD
DISEASE CONTROL
ENFERMEDADES FUNGOSAS
FLORIDA
FLORIDE
FUNGAL ANTAGONISTS
FUNGAL DISEASES
FUSARIUM OXYSPORUM
FUSARIUM OXYSPORUM F.SP. RADICIS-LYCOPER
GLOMUS INTRARADICES
LUTTE BIOLOGIQUE
LYCOPERSICON ESCULENTUM
MALADIE FONGIQUE
MARKETABLE YIELD
MICORRIZAS ARBUSCULARES VESICULARES
MIXTURES
MYCORHIZE A VESICULE ET ARBUSCULE
ORGANISMOS PARA CONTROL BIOLOGICO
PODREDUMBRE DE LA RAIZ
POURRITURE DES RACINES
QUALITE
QUALITY
RENDEMENT DES CULTURES
RENDIMIENTO DE CULTIVOS
ROOT ROTS
TRICHODERMA HARZIANUM
VESICULAR ARBUSCULAR MYCORRHIZAE
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Summary:Field experiments were conducted to evaluate commercial formulations of two beneficial fungi, Trichoderma harzianum and Glomus intraradices, for the control of Fusarium crown and root rot of tomato, caused by Fusarium oxysporum f. sp. radicis-lycopersici. Tomato seeds cv. "Sunny" were planted into soil nonamended or amended with the biocontrol agents, the former treatment serving as the control. After 6-7 weeks, plants were transplanted into beds fumigated with methyl bromide-chloropicrin in commercial tomato fields with a previous history of Fusarium crown and root rot. Disease incidence and severity were recorded at harvest maturity. Large and extra-large fruits (greater than or equal to 6.27 cm) also were harvested, counted, and weighed at maturity. Total marketable fruit yield was also determined. Compared to the controls, significant decreases in disease incidence were obtained with treatments of T. harzianum (1993), G. intraradices (1991), and T. harzianum + G. intraradices (both years). Significant decreases in disease severity were obtained with the treatments of T. harzianum (1993), G. intraradices (1991), and T. harzianum + G. intraradices (1993). Yields of large and extra-large fruit or total marketable yield were not significantly different over the controls. These data suggest that commercial biological control agents may be effective in reducing Fusarium crown and root rot and that further evaluation of these agents is justified.
ISSN:1049-9644
1090-2112
DOI:10.1006/bcon.1995.1051