QUANTITATIVE AND QUALITATIVE COMPARISONS OF FUSARIUM POPULATIONS IN CULTIVATED FIELDS AND NONCULTIVATED PARENT SOILS

1965 ◽  
Vol 43 (8) ◽  
pp. 939-945 ◽  
Author(s):  
Shirley M. Nash ◽  
William C. Snyder
Keyword(s):  
Fusarium Oxysporum ◽  
Fusarium Solani ◽  
Field Soils ◽  
Single Clone ◽  
Fusarium Tricinctum ◽  
Cultivated Soils

In soils of the Salinas watershed Fusarium solani and Fusarium tricinctum were found only in the cultivated soils. Propagules of Fusarium oxysporum were numerous and varied in the cultivated fields but were relatively scarce and existed essentially as a single clone in the noncultivated soils. In the Castroville watershed both F. solani and F. oxysporum were recovered from noncultivated soils fairly frequently.The 'Gibbosum' cultivar of Fusarhim roseum, the most frequently isolated fusarium from field soils, was less common in the noncultivated soils.Other fusaria, such as Fusarium episphaeria and some cultivars of F. roseum, were about as numerous in the noncultivated as in the cultivated soils. The cultivation of these soils markedly affected the makeup of the fusarium populations in them.

scholarly journals Zoneamento e identificação de Fusarium spp. causadores de podridão de raízes em plantios de erva-mate (Ilex paraguariensis A. St.-Hil.) na região do vale do Taquarí, RS.

2006 ◽  
Vol 16 (1) ◽  
pp. 1 ◽  
Author(s):  
Igor Poletto ◽  
Marlove Fatima Brião Muniz ◽  
Denise Ester Ceconi ◽  
Delmar Santin ◽  
Maria Nevis Deconto Weber ◽  
...  
Keyword(s):  
Fusarium Oxysporum ◽  
Fusarium Solani ◽  
Ilex Paraguariensis ◽  
Fusarium Spp ◽  
Fusarium Tricinctum

Em 2004, foram constatados sintomas da doença podridão-de-raízes em ervais nos municípios da região alta do Vale do Taquari, RS. Com o auxílio de técnicos da EMATER, fez-se um levantamento dos municípios que possuíam ervais com sintomas. Em 10% dos ervais afetados, coletaram-se amostras de raízes que foram enviadas para análise no Laboratório de Fitopatologia pertencente ao Departamento de Defesa Sanitária/CCR/UFSM. Foram isoladas e identificadas cinco diferentes espécies do fungo Fusarium associadas à doença: Fusarium oxysporum, Fusarium solani, Fusarium decemcellulare, Fusarium tabacinum e Fusarium tricinctum. Todas as espécies se mostraram patogênicas quando inoculadas em plantas de erva-mate (Ilex paraguariensis A. St.-Hil.). No momento da coleta das amostras, levantaram-se informações sobre o manejo do erval e discutiu-se a similaridade entre os sintomas apresentados na erva-mate e em culturas agronômicas bem como hipóteses sobre a origem do inóculo de Fusarium spp. que proporcionou a contaminação dos ervais.

In vitro activity of olorofim against clinical isolates of the Fusarium oxysporum and Fusarium solani species complexes

Mycoses ◽  
2021 ◽  
Author(s):  
Hamid Badali ◽  
Connie Cañete‐Gibas ◽  
Hoja Patterson ◽  
Carmita Sanders ◽  
Barbara Mermella ◽  
...  
Keyword(s):  
Fusarium Oxysporum ◽  
Fusarium Solani ◽  
Vitro Activity ◽  
Clinical Isolates ◽  
In Vitro Activity ◽  
Species Complexes

POPULATIONS OF FUSARIUM OXYSPORUM F. MELONIS AND THEIR RELATION TO THE WILT POTENTIAL OF TWO SOILS

1963 ◽  
Vol 9 (2) ◽  
pp. 237-249 ◽  
Author(s):  
R. N. Wensley ◽  
C. D. McKeen
Keyword(s):  
Fusarium Oxysporum ◽  
Random Sampling ◽  
Direct Relationship ◽  
Sandy Loam ◽  
Sandy Loam Soil ◽  
Random Samples ◽  
Field Soils ◽  
Infested Field ◽  
Loam Soil ◽  
Wilt Incidence

The relation of soil populations of the muskmelon wilt fungus, Fusarium oxysporum f. melonis, to the wilt potentials of a yellow Fox sandy loam soil (Fsl) and a dark Colwood loam (Cl) was investigated. In either soil a direct relationship existed between the size of the population of the fungus and wilt incidence. Notwithstanding this relationship, with the same population the greater incidence of wilt in Fsl than in Cl showed that a factor or factors other than population affect the wilt potential. Whereas mean populations of field soils obtained at the site of wilted plants ranged upward to 3300 per gram, they declined steadily during the 9-month interval between crops. During this interval random samples of field soils yielded mean populations of 228 and 268 per gram of Fsl and Cl, respectively. Of the F. oxysporum colonies isolated at the end of harvest, about 70% from plant sites and approximately 21% from intersites were pathogenic. Two to eight months later only 12 to 15% of F. oxysporum isolates obtained by random sampling of infested field soils were pathogenic.

scholarly journals Perfect Stages of Fusarium oxysporum and of Fusarium solani f. pisi still Unknown

Nature ◽  
1961 ◽  
Vol 189 (4764) ◽  
pp. 596-596 ◽  
Author(s):  
WILLIAM C. SNYDER ◽  
JAMES V. ALEXANDER
Keyword(s):  
Fusarium Oxysporum ◽  
Fusarium Solani

Corrélations entre l'aptitude de différentes souches de Fusarium à limiter la fusariose vasculaire du lin, leur activité respiratoire et leur développement saprophytique dans un sol désinfecté

1991 ◽  
Vol 37 (12) ◽  
pp. 889-896 ◽  
Author(s):  
Hamid Amir
Keyword(s):  
Fusarium Oxysporum ◽  
Fusarium Solani ◽  
Soil Type ◽  
Death Rate ◽  
Respiratory Activity ◽  
Untreated Soil ◽  
Positive Correlation ◽  
Ecophysiological Traits ◽  
Heat Treated ◽  
Severity Of The Disease

Correlations between two ecophysiological traits of 13 Fusarium strains (viz., ability to develop saprophytically in a disinfected soil and respiratory activity) and their capacity to protect a flax crop from vascular fusariosis were established for one soil type. The ability of Fusarium strains to reduce the severity of the disease (efficiency) differed greatly. The most competent ones lowered the death rate by 80%, while the least competent had virtually no effect. Classification based on strain efficiency differed depending on whether it was performed on disinfected soil or on soil not heat treated. When the abilities of strains to colonize disinfected soil were estimated by enumeration on agar plates, Fusarium oxysporum strains proved superior to Fusarium solani due to their production of more numerous conidia, and therefore greater numbers of colonies, without significantly increasing biomass. Respiratory activity ranged from moderate to low. A clear, positive correlation was found between the respiratory activity and the efficiency of the strains grown in untreated soil, while the correlation was not significant in the disinfected soil. In the latter case, however, efficiency was correlated with the saprophytic development of the strains. [Journal translation]

scholarly journals Histopathological features of infections caused by Fusarium oxysporum and F. solani in purple passionfruit plants (Passiflora edulis Sims)

2014 ◽  
Vol 40 (2) ◽  
pp. 134-140 ◽  
Author(s):  
Emiro Ortiz ◽  
Marisol Cruz ◽  
Luz Marina Melgarejo ◽  
Xavier Marquínez ◽  
Lilliana Hoyos-Carvajal
Keyword(s):  
Fusarium Oxysporum ◽  
Fusarium Solani ◽  
Vascular System ◽  
European Market ◽  
Plant Colonization ◽  
Passiflora Edulis ◽  
Histopathological Features ◽  
Passiflora Edulis Sims ◽  
Xylem Fibers ◽  
Different Tissues

The purple passionfruit plant, Passifloraedulis Sims, ranks second in fruit exportation in Colombia, and its main destination is the European market. However, its production is affected by several diseases, including fusariosis. This paper presents the histopathological features of different tissues affected by the pathogens Fusarium oxysporum and Fusarium solani. Both microorganisms produce similar responses on the plant: colonization of xylem vessels by hyphae and microconidia, hypertrophy and hyperplasia of the cambium, xylem and phloem; destruction of xylem fibers and amyloplasts in parenchymatous cells; and production of gels by the plant. However, there are differences in the colonization mechanism, F. solani penetrates and is concentrated especially at the collar zone, while F. oxysporum penetrates the roots and moves through the vascular system to colonize the plant.

Root-rot resistance in common bean

1993 ◽  
Vol 73 (1) ◽  
pp. 365-367 ◽  
Author(s):  
J. C. Tu ◽  
S. J. Park
Keyword(s):  
Phaseolus Vulgaris ◽  
Rhizoctonia Solani ◽  
Common Bean ◽  
Fusarium Oxysporum ◽  
Key Words ◽  
Fusarium Solani ◽  
Root Rot ◽  
Pythium Ultimum ◽  
Growth Room

A bean (Phaseolus vulgaris) line, A - 300, resistant to Rhizoctonia solani and Fusarium oxysporum was introduced into Ontario from Colombia. The results of tests conducted in a root-rot nursery, in a greenhouse and in a growth room showed that this bean line is resistant to Fusarium solani f. sp. phaseoli and Pythium ultimum. Key words: Bean, Phaseolus vulgaris, root rot resistance

Biological control of foot and root rot in pea caused by Fusarium solani with nonpathogenic Fusarium oxysporum isolates

1994 ◽  
Vol 72 (6) ◽  
pp. 843-852 ◽  
Author(s):  
P. J. Oyarzun ◽  
J. Postma ◽  
A. J. G. Luttikholt ◽  
A. E. Hoogland
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Fusarium Oxysporum ◽  
Root Rot ◽  
Antagonistic Effect ◽  
Plant Weight ◽  
Natural Field ◽  
Weight Losses ◽  
Field Soils

Two nonpathogenic isolates of Fusarium oxysporum were examined for their ability to counteract F. solani f.sp. pisi, which causes foot and dry root rot in pea. Antagonism was studied in vitro, in a sterilized field soil, and in six natural field soils. Besides native F. solani, other typical pea root rot pathogens occurred in the natural field soils. Both nonpathogenic F. oxysporum isolates reduced disease severity and prevented the plant weight losses that occurred owing to F. solani f.sp. pisi in sterilized soil. Precolonization of sterilized soil with nonpathogenic isolates increased the antagonistic effect. Also, in highly infested field soils the addition of nonpathogenic isolates resulted in lower disease severities and higher yields. Colonization of the soil organic matter by F. oxysporum reached 100% in sterilized soil, independent of the presence of F. solani, and 40 – 90% in naturally infested soils containing native F. solani. The performance of benomyl-resistant mutants of F. oxysporum did not differ from their wild types. Key words: antagonism, soil organic matter, colonization, Pisum sativum.

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