Hop protection against Downy mildew (Pseudoperonospora humuli) in Czech Republic

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F14864347%3A_____%2F17%3AN0000067" target="_blank" >RIV/14864347:_____/17:N0000067 - isvavai.cz</a>

Result on the web

<a href="http://www.lfl.bayern.de/ipz/hopfen/024299/" target="_blank" >http://www.lfl.bayern.de/ipz/hopfen/024299/</a>

DOI - Digital Object Identifier

—

Result language

angličtina

Original language name

Hop protection against Downy mildew (Pseudoperonospora humuli) in Czech Republic

Original language description

VOSTŘEL, Josef, Ivo KLAPAL and Markéta WERSCHALLOVÁ. Hop protection against Downy mildew (Pseudoperonospora humuli) in Czech Republic. In: F. WEIHRAUCH, ed. Proceedings of the Scientific-Technical Commission 25 – 29 June 2017, St. Stefan am Walde, Austria. Wolnzach: Scientific-Technical Commission of the International Hop Growers´ Convention, 2017, p. 50. ISSN 2512-3785. Hop downy mildew Pseudoperonospora humuli (DM) is the most dangerous harmful organism of hops in all hop growing areas of the Czech Republic. It is necessary to carry out many treatments every year to prevent damage caused by this pathogen. The strategy of hop protection against this disease is based on an early belt spray of fosetyl Al. The treatment is recommended in the time when young hop plants reach the height of 10-15 cm. Just after the first training in the second half of May another spray with fosetyl Al is usually carried out to eliminate the occurrence of primary infection in form of spikes later during the season. Since the beginning of June till the harvest usually four to seven treatments are made to control secondary infection of the pathogen. These sprays are recommended according to short time prognosis, which is based on the number of days with precipitations. Despite quite a lot of fungicides registered, most of them are copper-based, which can be used just in a limited scale. Problems for Czech hop growers, who have been accustomed to use copper fungicides for many decades, have arisen recently. Hop protection against DM is getting more difficult for them especially in the second half of the vegetation period, when copper fungicides were the most frequently used ones, particularly because of their short time pre-harvest interval and good efficacy on DM in the time of hop cone formation.

Czech name

—

Czech description

—

Type

O - Miscellaneous

CEP classification

—

OECD FORD branch

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

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

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