Stem application of metalaxyl for the protection of <i>Vitis vinifera</i> L. (‘Riesling’) leaves and grapes against downy mildew (<i>Plasmopara viticola</i>)

Authors

  • A. Düker
  • R. Kubiak

DOI:

https://doi.org/10.5073/vitis.2009.48.43-48

Keywords:

downy mildew, fungicide, grapevine, stem injection, stem application, viticulture, xylem

Abstract

The direct application of plant protective agents into tree xylem is an ecologically sound method of plant protection, which has already been used for trees in urban environements. In order to make this system viable for grapevines (Vitis), the effectiveness of the protective system must be ensured. In the first experiment, the effect of the fungicide agents dimethomorph, fosetyl-al, iprovalicarb and metalaxyl applied to the stem of field-grown grapevines was investigated. As a result, injection experiments using non-formulated metalaxyl showed the desired protective effects against downy mildew (Plasmopora viticola). In the second experiment, non-formulated metalaxyl was applied several times in succession over a period of several weeks to the xylem of test grapevines using an injection system, affixed long-term to the vine stems. Grapevines sprayed with formulated metalaxyl (Fonganil Gold®) enabled the methods to be compared. The efficiency factors with regard to the control of downy mildew in leaves and grapes were very similar in both approaches, with values of practical relevance of over 70 %.

 

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Published

2015-04-08

Issue

Vol. 48 No. 1 (2009): Vitis

Section

Article

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