Current Concepts in the Use of Introduced Bacteria for Biological Disease Control: Mechanisms and Antifungal Metabolites

1996 ◽  
pp. 187-235 ◽  
Author(s):  
Linda S. Thomashow ◽  
David M. Weller
Keyword(s):  
Disease Control ◽  
Control Mechanisms ◽  
Antifungal Metabolites ◽  
Biological Disease Control

GENETIC MODIFICATIONS OF PSEUDOMONAS THAT ENHANCE BIOLOGICAL DISEASE CONTROL

1999 ◽  
pp. 53-60 ◽  
Author(s):  
J.M. Ligon ◽  
D.S. Hill ◽  
P.E. Hammer ◽  
N.R. Torkewitz ◽  
D. Hofmann ◽  
...  
Keyword(s):  
Disease Control ◽  
Genetic Modifications ◽  
Biological Disease Control

BIOLOGICAL DISEASE CONTROL: CONSIDERATIONS FOR SEED TREATMENT AND STAND ESTABLISHMENT

1999 ◽  
pp. 69-74 ◽  
Author(s):  
D.P. Roberts ◽  
E.L. Stromberg ◽  
G.H. Lacy ◽  
J.S. Buyer
Keyword(s):  
Disease Control ◽  
Seed Treatment ◽  
Stand Establishment ◽  
Biological Disease Control

scholarly journals Iturin Levels on Wheat Spikes Linked to Biological Control of Fusarium Head Blight by Bacillus amyloliquefaciens

2013 ◽  
Vol 103 (2) ◽  
pp. 146-155 ◽  
Author(s):  
J. M. Crane ◽  
D. M. Gibson ◽  
R. H. Vaughan ◽  
G. C. Bergstrom
Keyword(s):  
Biological Control ◽  
Disease Control ◽  
Fusarium Head Blight ◽  
Mode Of Action ◽  
Bacillus Amyloliquefaciens ◽  
Antifungal Compounds ◽  
Head Blight ◽  
Main Mode ◽  
Antifungal Metabolites

The TrigoCor strain of Bacillus amyloliquefaciens provides consistent control against Fusarium head blight of wheat in controlled settings but there is a lack of disease and deoxynivalenol suppression in field settings. Since production of antifungal compounds is thought to be the main mode of action of TrigoCor control, we quantified levels of a key family of antifungal metabolites, iturins, as well as monitored Bacillus populations on wheat spikes over 14 days post-application in both the greenhouse and the field. We found that initial iturin levels on spikes in the greenhouse were three times greater than on spikes in the field, but that by 3 days post-application, iturin levels were equivalent and very low in both settings. We also determined that iturins declined rapidly over a 3-day post-application period on wheat spikes in both environments, despite the presence of significant Bacillus populations. Greenhouse trials and antibiosis tests indicated that the lower iturin levels on wheat spikes in the field could be a major factor limiting disease control in field settings. Future efforts to improve Bacillus disease control on wheat spikes and in the phyllosphere of various plants should focus on maintaining higher levels of iturins over critical infection periods.

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