J 2016

Temperature-dependent effect of two neurotoxic insecticides on predatory potential of Philodromus spiders

MICHALKO, Radek and Ondřej KOŠULIČ

Basic information

Original name

Temperature-dependent effect of two neurotoxic insecticides on predatory potential of Philodromus spiders

Authors

MICHALKO, Radek (203 Czech Republic, guarantor, belonging to the institution) and Ondřej KOŠULIČ (203 Czech Republic)

Edition

Journal of Pest Science, 2016, 1612-4758

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10600 1.6 Biological sciences

Country of publisher

Germany

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 3.728

RIV identification code

RIV/00216224:14310/16:00089415

Organization unit

Faculty of Science

UT WoS

000376923400020

Keywords in English

Lethal effect; Sublethal effect; Spinosad; lambda-cyhalothrin; Functional response

Tags

Změněno: 14/4/2017 11:46, Ing. Andrea Mikešková

Abstract

V originále

Although temperature significantly influences pesticides’ impact on ectotherms, the joint effect of temperature and pesticides on natural enemies is understudied. In laboratory conditions, we investigated the influence of two commonly used insecticides, spinosad and lambda-cyhalothrin, on mortality and functional response of a community of Philodromus spiders (P. cespitum 80 %, P. albidus 20 %) at different temperatures (10, 17, 25, and 31 °C). Almost all spiders died at 31 °C in the lambda-cyhalothrin treatment. Mortality was very low at other temperatures. Mortality in the spinosad treatment did not differ from the control. Both pesticides reduced the prey capture rate and/or changed the type of functional response at all temperatures. The sublethal effects of lambda-cyhalothrin were most pronounced at 10 °C, while those of spinosad were most marked at 10 and 25 °C. At 10 °C, the pesticides’ effects on the spiders were long lasting. In addition, lambda-cyhalothrin influenced the philodromids much more negatively than spinosad suggesting its incompatibility with IPM across all temperatures. The results support the importance of studying the temperature-specific effects of pesticides in order to increase the efficiency of integrated pest management. Philodromids are effective in pest suppression at low temperatures, but application of pesticides at the beginning of the season can significantly disrupt their biocontrol potential.