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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F17%3A73583930" target="_blank" >RIV/61989592:15310/17:73583930 - 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 downy mildew populations

Original language description

A total of 159 Czech P. cubensis isolates (from 2005 to 2011) were used for fungicide efficacy screening. Six commonly used and registered fungicides (except Ridomil Plus 48 WP that served as control) were tested for efficacy against P. cubensis. Fungicide sensitivity was determined by a floating leaf disc bioassay with five concentrations. Fosetyl-Al (Aliette 80 WP) and propamocarb (Previcur 607 SL) were the most effective. Metalaxyl (Ridomil Plus 48 WP) and metalaxyl-M (Ridomil Gold MZ 68 WP) were ineffective. However in 2010 efficacy of these fungicides increased slightly. In 2011, the same phenomenon appeared in reaction to metalaxyl-M. Cymoxanil (Curzate K) showed a very low efficacy during the period of study except the year 2009. Frequency of sensitive/moderately resistant/resistant strains to dimethomorph (Acrobat MZ WG) varied significantly during seven-years of screening and there was recorded a temporal shift towards higher sensitivity on all concentrations in Czech P. cubensis populations. From 2012 to 2014, efficacy of two new commonly used and registered fungicides (fluopicolide, propamocarb-hydrochloride /Infinito/, azoxystrobin /Ortiva/) was screened. As well as there has been continued monitoring of cymoxanil, dimethomorph and metalaxyl-M efficacy. Altogether 52 Czech P. cubensis isolates were screened using a floating leaf disc bioassay with three concentrations. Efficacy of fungicides against Czech P. cubensis populations varied among the years. Cymoxanil (Curzate K) was ineffective. In contrast to 100% efficacy of dimethomorph (Acrobat MZ WG) and Fluopicolide and propamocarb-hydrochloride (Infinito). Efficacy of metalaxyl-M (Ridomil Gold MZ Pepite) was high on contrary to very low efficacy of azoxystrobin (Ortiva). This research was supported by these projects: 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

117-118

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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