Host location behavior of Cotesia plutellae Kurdjumov (Hymenoptera: Braconidae) in ambient and moderately elevated ozone in field conditions

Environmental Pollution
Delia M PintoJarmo K Holopainen

Abstract

In field O(3)-enrichment experiments increased herbivore densities have been reported, which could be due to negatively affected host location behavior of natural enemies. We addressed the impact of doubling background O(3) on the host location of the parasitoid Cotesia plutellae by conducting 24-h trials in an open-air O(3)-fumigation system during two consecutive years. Two circles (radii 1.40 and 4.00 m) of Plutella xylostella-infested potted cabbage plants were placed in the O(3) and ambient plots. Female wasps were released into each plot from the center, and observed 5 times over a 24-h period to assess their host location capability. Thereafter, plants were kept in laboratory conditions until larvae pupation to determine parasitism rates. No significant differences were detected between ambient and O(3)-enriched environments either in the number of wasps found in the field, or in the percentages of parasitized larvae. This suggests that moderately elevated O(3) will not affect the behavior of this parasitoid.

Citations

Apr 9, 2009·Oecologia·Quinn S McFrederickManuel Lerdau
Jan 20, 2010·Journal of Chemical Ecology·Delia M PintoJarmo K Holopainen
Apr 21, 2009·Nature Chemical Biology·Marcel DickeRoxina Soler
May 9, 2009·The New Phytologist·Jullada LaothawornkitkulC Nicholas Hewitt
Apr 18, 2014·Plant, Cell & Environment·James D BlandeUlo Niinemets
Mar 31, 2017·Journal of Chemical Ecology·Patricia Sarai Giron-CalvaJames D Blande
Sep 3, 2010·Proceedings. Biological Sciences·Edith KatsnelsonArnon Lotem
Dec 30, 2016·Ecology and Evolution·Andrea Clavijo McCormick
Jan 26, 2010·Trends in Plant Science·Josep Peñuelas, Michael Staudt

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