scholarly journals Biological Control of Seedling Damping – Off of Sugar Beet Plant

2018 ◽  
Vol 9 (5) ◽  
pp. 137-140
Author(s):  
Aida Afify ◽  
abd elnasar El-Sayed ◽  
Seham Elpana
Keyword(s):  
Biological Control ◽  
Sugar Beet ◽  
Sugar Beet Plant ◽  
Damping Off

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 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

scholarly journals Preliminary experiments into the use of Streptomyces spp. isolated from peat in the biological control of soil and seed-borne diseases in peat culture 

1982 ◽  
Vol 54 (5) ◽  
pp. 357-369 ◽  
Author(s):  
Risto Tahvonen
Keyword(s):  
Biological Control ◽  
Sugar Beet ◽  
Fusarium Culmorum ◽  
Fine Sand ◽  
Alternaria Brassicicola ◽  
Foot Rot ◽  
Damping Off ◽  
Sand Soil ◽  
Seeding Layer ◽  
Streptomyces Spp

Streptomyces spp. isolates obtained from peat effectively inhibited the growth of Alternaria brassicicola Wiltshire, Fusarium culmorum (W. G. Smith) Sacc., F. sulphureum Schlechtendahl, Pythium debaryanum auct. non Hesse and Rhizoctonia solani Kühn on PDA medium, but Streptomyces spp. isolates from fine sand soil were not effective against F. culmorum compared to the strains isolated from peat. Treatment of cauliflower seeds with Streptomyces spp. isolated from peat effectively controlled damping-off caused by A. brassicicola and R. solani when the seedlings were grown on either disinfected or fresh peat. Spraying the seeding layer of the peat substrate with a suspension of Streptomyces reduced the mortality of barley sprouts and foot rot caused by F. culmorum, and damping-off on sugar beet caused by P. debaryanum.

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