Environmental conditions that contribute to development and severity of sugar beet Fusarium yellows caused by Fusarium oxysporum f. sp. betae: temperature

2011 ◽  
Author(s):  
Kimberly M. Webb ◽  
Tammy Brenner
Keyword(s):  
Sugar Beet ◽  
Fusarium Oxysporum ◽  
Environmental Conditions

scholarly journals Induction of Beet-Cyst Nematode Suppressiveness by the Fungi Dactylella oviparasitica and Fusarium oxysporum in Field Microplots

2006 ◽  
Vol 96 (8) ◽  
pp. 855-859 ◽  
Author(s):  
Rabiu Olatinwo ◽  
James Borneman ◽  
J. Ole Becker
Keyword(s):  
Sugar Beet ◽  
Fusarium Oxysporum ◽  
Cyst Nematode ◽  
Heterodera Schachtii ◽  
Field Soil ◽  
Degree Days ◽  
Population Densities ◽  
Time Points ◽  
Second Stage ◽  
Greenhouse Study

The ability of Dactylella oviparasitica and Fusarium oxysporum to suppress Heterodera schachtii numbers was examined in field microplots. Fungi were individually added to fumigated field soil that was seeded with sugar beet. Four weeks later, soils were infested with H. schachtii second-stage juveniles (J2). At two harvests, 11 weeks and 19 weeks (1,469 and 2,547 degree days (base 8°C), respectively) after nematode-infestation, H. schachtii cyst and egg numbers were assessed. At both time points, D. oviparasitica reduced H. schachtii population densities to those in the naturally suppressive soil, even when additional H. schachtii J2 were added to the microplots after the first harvest. Although F. oxy-sporum did not alter H. schachtii population densities after 11 weeks, significant reductions were detected after 19 weeks. The sustainability of the H. schachtii suppressiveness created by single applications of the fungi at the beginning of the microplot trials was further examined in a greenhouse study. Soil collected at the completion of the microplot trials was potted and seeded with sugar beet. Four weeks later, each pot was infested with H. schachtii J2. Approximately 16 weeks (1,389 degree days) after seeding, the D. oviparasitica-amended soil produced greater fresh root weights and considerably smaller nematode population densities than the nonamended control.

scholarly journals Genetic variability among isolates of Fusarium oxysporum from sugar beet

2010 ◽  
Vol 60 (3) ◽  
pp. 496-505 ◽  
Author(s):  
A. L. Hill ◽  
P. A. Reeves ◽  
R. L. Larson ◽  
A. L. Fenwick ◽  
L. E. Hanson ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Sugar Beet ◽  
Fusarium Oxysporum

scholarly journals QUALITY OF SOME SUGAR BEET VARIETIES UNDER DIFFERENT ENVIRONMENTAL CONDITIONS

2018 ◽  
Vol 7 (1) ◽  
pp. 17-34
Author(s):  
Mohamed Khalil ◽  
Mohamed Mubarak ◽  
Ayman AbdEl-Razek ◽  
Eman ElSarag
Keyword(s):  
Sugar Beet ◽  
Environmental Conditions

scholarly journals Ability of Non-Pathogenic Fusarium oxysporum Strain Fo47 to Suppress Rhizomania Disease of Sugar Beets in Morocco

2018 ◽  
Vol 10 (1) ◽  
pp. 137-142 ◽  
Author(s):  
Fatima NOUAYTI ◽  
Ilham MADANI ◽  
Abdessalem TAHIRI ◽  
Abdelali BLENZAR ◽  
Rachid LAHLALI
Keyword(s):  
Sugar Beet ◽  
Fusarium Oxysporum ◽  
Seed Treatment ◽  
Biocontrol Agent ◽  
Elisa Test ◽  
Soil Treatment ◽  
Virus Concentration ◽  
Polymyxa Betae ◽  
Term Survival

Rhizomania is one of the most devastating diseases of sugar beet worldwide. The disease poses a serious threat to Moroccan production and it is capable of significantly decreasing quality and yield of sugar beet plantations. The long-term survival of its fungal vector (Polymyxa betae) in soil makes it a very difficult disease to manage. Therefore, this study investigated the potential of a non-pathogenic fungal Fusarium oxysporum strain Fo47 to control Polymyxa betae. This biocontrol agent was applied as soil treatment, seed treatment, or a combination of the both treatments. A bio-test was performed on treated soil. After four weeks of culture, the roots of sugar beet seedlings were retrieved and analyzed by the DAS-ELISA test. Results indicated that F. oxysporium Fo47 reduced the activity and survival of P. betae when compared to a reference biocontrol agent Trichoderma harzianum, which only revealed significant in reducing the viral load of Beet Necrotic Yellow Vein Virus (BNYVV) as seed treatment. The non-pathogenic Fusarium oxysporum Fo47 was more effective as soil treatment and allowed almost the same reduction of BNYVV virus concentration as T. harzianum 908. Therefore, our findings emphasizes that the performance of the biocontrol agent depends on the method of application.

scholarly journals Pea Fusarium wilt races in western Algeria

2014 ◽  
Vol 50 (No. 2) ◽  
pp. 70-77
Author(s):  
A. Merzoug ◽  
L. Belabid ◽  
M. Youcef-Benkada ◽  
F. Benfreha ◽  
B. Bayaa
Keyword(s):  
Fusarium Oxysporum ◽  
Fusarium Wilt ◽  
Environmental Conditions ◽  
Yield Losses ◽  
Sources Of Resistance ◽  
Climatic Zones ◽  
Pathogen Variability ◽  
Western Algeria ◽  
Differential Hosts ◽  
Pathogenic Variability

The fungus Fusarium oxysporum f.sp. pisi (FOP), the pea wilt pathogen, causes appreciable yield losses under favourable environmental conditions in Algeria. Studies on the pathogen variability and distribution of races are essential to identify effective sources of resistance to this disease. In this study, a survey was conducted during the period 2007–2011 in four different agro-climatic zones. Pathogenic variability in 52 isolates of FOP, collected from different pea-growing areas of western Algeria, were evaluated using 7 genotypes as differential hosts. Results indicated that the disease was prevalent in all fields prospected and isolates obtained were assigned to Races 1, 2, 5 or 6 by their pathogenicity. It was found out that Races 1 and 2 were more common in all areas with 61.5 and 19.2%, respectively. This study is the first report of pea Fusarium wilt races distribution in Algeria.  

scholarly journals Cross Pathogenicity and Vegetative Compatibility of Fusarium oxysporum Isolated from Sugar Beet

Plant Disease ◽  
2013 ◽  
Vol 97 (9) ◽  
pp. 1200-1206 ◽  
Author(s):  
Kimberly M. Webb ◽  
Austin J. Case ◽  
Mark A. Brick ◽  
Kris Otto ◽  
Howard F. Schwartz
Keyword(s):  
United States ◽  
Phaseolus Vulgaris ◽  
Sugar Beet ◽  
Fusarium Oxysporum ◽  
The United States ◽  
Population Diversity ◽  
Vegetative Compatibility ◽  
Pathogenic Variation ◽  
Dry Edible Bean ◽  
Reliable Methods

Fusarium oxysporum f. sp. betae causes Fusarium yellows in sugar beet (Beta vulgaris). The F. oxysporum population from sugar beet can be highly variable in virulence and morphology and many isolates are nonpathogenic. Rapid and reliable methods to identify pathogenic isolates from nonpathogenic F. oxysporum generally are unavailable. Little is known about nonpathogenic isolates, including the role they may play in population diversity or virulence to sugar beet. Sugar beet is often grown in rotation with other crops, including dry edible bean (Phaseolus vulgaris) and onion (Allium cepa), with F. oxysporum able to cause disease on all three crops. Thirty-eight F. oxysporum isolates were collected from symptomatic sugar beet throughout the United States to investigate diversity of the F. oxysporum population and the influence of crop rotation on pathogenic variation. These isolates were characterized for pathogenicity to sugar beet, dry edible bean, and onion, as well as vegetative compatibility. Pathogenicity testing indicated that some F. oxysporum isolates from sugar beet may cause disease on onion and dry edible bean. Furthermore, vegetative compatibility testing supported previous reports that F. oxysporum f. sp. betae is polyphyletic and that pathogenic isolates cannot be differentiated from nonpathogenic F. oxysporum using vegetative compatibility.

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