scholarly journals Use of Trichoderma Spp. For Biological Control of Sugar Beet Damping- Off Caused by Fusarium Spp. إستعمال فطريات التريکودرما لمقاومة مرض موت بادرات بنجر السکر الناجم عن الإصابه بفطريات الفيوزاريوم

2021 ◽  
Vol 12 (4) ◽  
pp. 75-77
Author(s):  
A. Ashour ◽  
A. El-Sawah ◽  
Aida Afify
Keyword(s):  
Biological Control ◽  
Sugar Beet ◽  
Damping Off ◽  
Fusarium Spp ◽  
Trichoderma Spp

Biological control of damping-off of sugar-beet and cotton with Chaetomium globosum or a fluorescent Pseudomonas sp.

1988 ◽  
Vol 34 (5) ◽  
pp. 631-637 ◽  
Author(s):  
D. Walther ◽  
D. Gindrat
Keyword(s):  
Biological Control ◽  
Sugar Beet ◽  
Seed Treatment ◽  
Pythium Ultimum ◽  
Chaetomium Globosum ◽  
Pseudomonas Sp ◽  
Damping Off ◽  
Antifungal Metabolites ◽  
Fluorescent Pseudomonas

Seed treatment with ascospores of Chaetomium globosum reduced damping-off of sugar-beet caused by seed-borne Phoma betae and soil-borne Pythium ultimum or Rhizoctonia solani in growth chamber experiments. Seed treatment with a fluorescent Pseudomonas sp. controlled Ph. betae and P. ultimum but not R. solani. Coating cotton seeds with ascospores controlled P. ultimum and R. solani damping-off. In some experiments, biological seed treatments were equally or more effective than seed treatment with captan. However, greater variability in disease control occurred with the antagonists than with captan. Fifty percent of freshly harvested ascospores of C. globosum germinated in 8 h on water agar. When ascospores were stored under air-dried conditions for 3 days to 2.5 years, germination increased to > 90%. Under same storage conditions, survival of Pseudomonas sp. was detected after 4 months. Antagonistic activities observed in vitro were hyphal coiling of C. globosum on R. solani, and mycostasis was induced by C. globosum or Pseudomonas sp. on agar and soil. The presumed cause of mycostasis is the diffusible antifungal metabolites which may also be involved in the biological control of damping-off.

scholarly journals Damping-off of sugar beet in Finland: I. Causal agents and some factors affecting the disease

1982 ◽  
Vol 54 (4) ◽  
pp. 225-244
Author(s):  
Mauritz Vestberg ◽  
Risto Tahvonen ◽  
Kyösti Raininko
Keyword(s):  
Sugar Beet ◽  
Fusarium Species ◽  
Damping Off ◽  
Fusarium Spp ◽  
Factors Affecting ◽  
Pathogenicity Tests ◽  
Phoma Betae

The fungus Pythium debaryanum auct. non Hesse is the main cause of damping-off on sugar beet in Finland. The fungus is found especially in diseased seedlings during the first two weeks after emergence. Later on, when the plants have one or two pairs of true leaves, Fusarium spp. can be isolated to a rather great extent. However, pathogenicity tests with three different Fusarium species have shown that this fungus is unble cause damping-off on sugar beet when inoculated into peat substrate. Among the fungi tried in this respect, only Pythium debaryanum and Phoma betae Frank showed clear pathogenicity. Sugar beet seedlings that outlive the disease grow slower, and their quality at harvest in the autumn is poorer than that of healthy beets.

scholarly journals Biological control of cucumber and sugar beet damping-off caused by Pythium ultimum with bacterial and fungal antagonists

2002 ◽  
Vol 92 (6) ◽  
pp. 1078-1086 ◽  
Author(s):  
D.G. Georgakopoulos ◽  
P. Fiddaman ◽  
C. Leifert ◽  
N.E. Malathrakis
Keyword(s):  
Biological Control ◽  
Sugar Beet ◽  
Pythium Ultimum ◽  
Damping Off
Sign in / Sign up

Export Citation Format

Share Document