Control of two-spotted spider mite Tetranychus urticae by predators with the help of released Typhlodromus pyri within IPM and organic hop growing in Saaz hop growing region (eleven years' experience)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F14864347%3A_____%2F19%3AN0000091" target="_blank" >RIV/14864347:_____/19:N0000091 - isvavai.cz</a>

Result on the web

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

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Control of two-spotted spider mite Tetranychus urticae by predators with the help of released Typhlodromus pyri within IPM and organic hop growing in Saaz hop growing region (eleven years' experience)

Original language description

VOSTŘEL, Josef. Control of two-spotted spider mite Tetranychus urticae by predators with the help of released Typhlodromus pyri within IPM and organic hop growing in Saaz hop growing region (eleven years' experience). In: F. WEIHRAUCH, ed. Proceedings of the Scientific-Technical Commission 07 – 11 July 2019, Bischoffsheim, France. Wolnzach: Scientific-Technical Commission of the International Hop Growers' Convention, 2019, p. 115. ISSN 2512-3785. Two-spotted spider mite (Tetranychus urticae) is a the most dangerous pest of hops, especially in Saaz hop growing region, typical for low precipitations. Contemporary hop protection against this pest, based entirely on application of miticides, has become difficult because their future using is uncertain either because of their decreasing efficiency or their toxicity on non-target organisms. One possible way of controlling resistant populations of T. urticae is to increase the efficiency of the natural control by native acarophagous predators supported by released predatory mite Typhlodromus pyri. The most important predator of T. urticae is a tiny mite-eating lady bird Stethorus punctillum. Whereas in some of the hop yards one release was enough, in most of them predatory mites have had to be released repeatedly (2-3x) since 2008. Thanks to predatory mites the density of acarophagous predators has established at the level able to control T. urticae without the necessity of miticides applications. The ability of predators to keep spider mites under the economic threshold showed also under the extraordinary hot and dry weather conditions of the year 2018, when numerous miticide sprays had to be carried out to control this dangerous pest in other conventional hop yards.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

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

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

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