The potential of non-pathogenic Gaeumannomyces spp., occurring naturally or introduced into wheat crops or preceding crops, for controlling take-all in wheat
Article first published online: 19 DEC 2006
2006 Association of Applied Biologists
Annals of Applied Biology
Volume 150, Issue 1, pages 53–64, February 2007
How to Cite
Gutteridge, R.J., Jenkyn, J.F. and Bateman, G.L. (2007), The potential of non-pathogenic Gaeumannomyces spp., occurring naturally or introduced into wheat crops or preceding crops, for controlling take-all in wheat. Annals of Applied Biology, 150: 53–64. doi: 10.1111/j.1744-7348.2006.00107.x
- Issue published online: 19 DEC 2006
- Article first published online: 19 DEC 2006
- Received: 20 July 2006; revised versionaccepted: 31 October 2006.
- Biological control;
- fungal antagonists;
Take-all disease (Gaeumannomyces graminis var. tritici) in wheat crops is known to be suppressed by naturally occurring antagonistic fungi, closely related to the pathogen, that infect grasses and cereals. This form of suppression was re-investigated because of the changing importance and role of grass weeds and grass covers in arable farming. Natural populations of the competitive fungus Gaeumannomyces cylindrosporus, allowed to develop under rye-grass, were more effective than artificially introduced populations in suppressing the development of take-all in following wheat crops. To be effective, the antagonist needs to be present before the start of wheat cropping. Introducing G. cylindrosporus, but not G. graminis var. graminis (a potential antagonist that is faster growing), into a previous crop, or just after the previous crop, sometimes suppressed take-all, but the effect was small. It is concluded that, for any future attempts at biocontrol by these fungi, they should be introduced into a preceding crop not susceptible to take-all. Take-all inoculum in the soil should be at a minimum and effective hosts of the take-all pathogen must not be present as weeds or volunteers.