Alteration of Predatory Behavior of a Generalist Predator by Exposure to Two Insecticides

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F17%3A43912720" target="_blank" >RIV/62156489:43410/17:43912720 - isvavai.cz</a>

Result on the web

<a href="http://www.isbca-2017.org/download/ISBCA-Proceedings.web.pdf" target="_blank" >http://www.isbca-2017.org/download/ISBCA-Proceedings.web.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Alteration of Predatory Behavior of a Generalist Predator by Exposure to Two Insecticides

Original language description

Predation pressure exerted by spiders on pests depends on their prey choice as well as predatory activity. However, both traits can be altered by exposure to pesticides. Possible influence of pesticides on the predatory activity of spiders is known for quite a few preparations and the predatory activity can be decreased as well as increased. However, the effects of pesticides on prey choice of natural enemies have not been studied yet. The prey choice in euryphagous spiders might be altered either by the blurred cognitive abilities or by increased voracity, which are sometimes connected to lower prey choosiness in euryphagous spiders. Here we tested the effect of two insecticides, SpinTor(R) (a.i. spinosad) and Integro(R) (a.i. methoxyfenozide), on the predatory activity and prey choice of spider Philodromus cespitum (Araneae: Philodromidae). We investigated the prey choice of P. cespitum between the pest Cacopsylla pyri (Hemiptera: Psyllidae) and spiders Theridion sp. (Araneae: Theridiidae). We evaluated the predatory activity as overall number of killed prey for both prey types. We found that the philodromids in control treatment significantly preferred theridiids to psylla while the philodromids in both pesticide treatments did not show any distinct prey preferences. Although SpinTor has been shown to decrease the predatory activity of philodromids in previous studies, both pesticide treatments increased the predatory activity of philodromids in comparison to the control in this study. The results show that the application of pesticides can disrupt the natural ecological dynamics of predator-prey interactions, not only due to the changed predátory activity but also due to the altered prey choice.

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

40102 - Forestry

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2017

Confidentiality

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

Article name in the collection

Proceedings of the 5th International Symposium on Biological Control of Arthropods

ISBN

978-1-78639-411-8

ISSN

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e-ISSN

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Number of pages

2

Pages from-to

302-303

Publisher name

CABI Publishing

Place of publication

Wallingford

Event location

Langkawi

Event date

Sep 11, 2017

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000461868100099