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Development of a beer yeast product to control apple scab in leaf litter. Subproject 1
Project
Project code: JKI-OW-08-1197, 2814IP011
Contract period: 01.03.2015
- 14.03.2018
Budget: 222,412 Euro
Purpose of research: Applied research
The aim of the project is a marketable product from beer yeast to control apple scab with an evaluated efficacy and recommendations for practical use. The beer yeast product should enable apple growers and particularly organic production to control this most important disease in view of “copper replacement” and sustainability. The developed efficient experimental preparations of the firm Leiber should also optimized in view of additives and praxis-tested chemical formulation. The biological evaluation, optimization and the development of recommendations for use should be investigated at JKI-Dossenheim and/or LVWO-Weinsberg. For this purpose basic data are revealed through the enhanced degradation of scabbed leaf litter by rain worms and microbes. The spore potential, the cause of infection risk by the pathogen, is damaged by the yeast supported microbial community and should be used to detect efficacies of the product variants. The enhanced feeding activity of the rain worms through the increase of leaf litter´s nourishment attractivity caused by yeast should be considered as a synergistic effect in course of the development of product. Recommendations of use should be developed through different scheduling and the quantity of yeast applications taking account of reduced efficacy caused by rain.
The efficacy of 1l yeast extracts with different formulations on leaf litter were investigated. The controls included urea and water-applications. 9 preparations of yeast showed a significant reduction of ascospore potential. The efficacy depended on application rate and time schedule. Formulation substances showed only a low improvement of efficacy. The assessment of leaf litter degradation revealed that yeast preparates were more effective as compared to urea. The degree of degradation correlated positively with the inhibition of ascospore potential. For the applications in 2016/2017 a selection of preparates were performed according to their microbiologic stimulations.
Section overview
Subjects
- Crop Protection
- Arboriculture
- Genetic Resources
Framework programme
Funding programme
Excutive institution
Institute for Plant Protection in Fruit Crops and Viticulture - Fruit Cops (JKI-OW)
