Long-lasting study of fungicide efficacy against Czech cucurbit powdery mildew populations

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F17%3A73583929" target="_blank" >RIV/61989592:15310/17:73583929 - isvavai.cz</a>

Result on the web

<a href="http://dpg.phytomedizin.org/fileadmin/daten/04_Verlag/02_SP/05_Reinhard/FungicidesVIII.pdf" target="_blank" >http://dpg.phytomedizin.org/fileadmin/daten/04_Verlag/02_SP/05_Reinhard/FungicidesVIII.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Long-lasting study of fungicide efficacy against Czech cucurbit powdery mildew populations

Original language description

A total of 150 cucurbit powdery mildew (CPM) isolates (78 Golovinomyces orontii s.l. /Go/, 72 Podosphaera xanthii /Px/) from the Czech Republic from 2007 to 2011, were screened for fungicide efficacy to the four frequently used fungicides (fenarimol /formulated as Rubigan 12 EC/, dinocap /Karathane LC/, thiophanate-methyl /Topsin M 70 WP/, azoxystrobin /Ortiva/) and a control fungicide (benomyl /Fundazol 50 WP/). Fungicide efficacy was determined by a modified leaf-disc bioassay with five concentrations. Highly susceptible Cucumis sativus ’Stela F1’ was used for preparation of leaf discs. Efficacy of the tested fungicides towards screened CPM isolates varied significantly during the studied period. From 2012 to 2013, efficacy of four new commonly used and registered fungicides (quinoxyfen /Atlas 500 SC/, propiconazole /Bumper 25 EC/, fenpropimorph /Corbel/, penconazole /Topas 100 EC/) was screened. As well as there has been continued monitoring of dinocap and azoxystrobin efficacy. Altogether 50 CPM Czech isolates (23 Go, 27 Px) were tested using a modified leaf-disc bioassay with three concentrations. Efficacy of fungicides towards screened CPM isolates varied significantly and there were observed also differences in efficacy of some fungicides between both CPM species and as well as between studied years. Fenpropimorph was 100% effective and showed phytotoxicity to C. sativus ’Stela F1’ leaf discs. Propiconazole and penconazole were also highly effective. Dinocap expressed decreased efficacy from 2012 to 2013 (mainly for Go). Quinoxyfen appeared less effective. Azoxystrobin showed decreased efficacy and there was observed a shift towards prevalence of azoxystrobin-resistant strains in Czech CPM populations in 2013. This research was supported by the following grants: QH71229, MSM6198959215, IGA_PrF_2016_001.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

40106 - Agronomy, plant breeding and plant protection; (Agricultural biotechnology to be 4.4)

Project

<a href="/en/project/QH71229" target="_blank" >QH71229: Diagnostics and methods of protection against quarantine and other economically important pathogens of fruit and leafy vegetables</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Modern fungicides and antifungal compounds VIII

ISBN

978-3-941261-15-0

ISSN

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e-ISSN

neuvedeno

Number of pages

2

Pages from-to

115-116

Publisher name

Deutsche Phytomedizinische Gesellschaft

Place of publication

Braunschweig

Event location

Friedrichroda

Event date

Apr 24, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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