Gesunde Pflanzen (2012) 64, 117-127

Stefania Kupfer and Gerhard Schröder (2012)
Effektive Kontrolle des Braunrostes (Puccinia recondita f. sp. secalis Rob. ex Desm.) in Winterroggen mit Fungiziden unterschiedlicher Wirkstoffgruppen - Auswertung der Ringversuche der Länder Brandenburg, Sachsen-Anhalt, Sachsen und Thüringen
Gesunde Pflanzen 64 (3), 117-127
Abstract: To investigate different control measures against the diseases in winter rye several trials were done in the German federal states.
As a result from these trials the brown rust, Puccinia recondita f. sp.secalis, was the disease with the most negative influence on the yield.
The brown rust occurrence at different times on the top three leaves depend on the winter and spring weather. It should be verify whether the protective use of fungicide mixtures with the new carboxamides active ingredient benefits the curative use (disease onset) in terms of achieved efficiency against P. recondita.
It can be stated that the action threshold does not need to be changed when using fungicide mixtures with carboxamides.
Regarding the duration of the fungicide efficacy against P. recondita an order in increasingly levels of efficiency could be determinate. The order is, from lowest to highest, azole fungicides, strobilurin-azole compounds, azole carboxamide compounds, and azole-carboxamide strobilurin mixtures.
Due to the variability in the values of the individual test sites in the experimental series the tendency could be confirmed, however, no statistical significant differences between the various mixtures could be determined.
The new carboxamides enrich the possibilities of targeted anti-resistance strategy against P. recondita in winter rye.
These trials results are introduced into recommendations for agricultural practice.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: German)
Link to article at publishers website

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Puccinia recondita	Rye (Secale cereale)	Germany