Entomologia Experimentalis et Applicata, ( ISI ), Volume (135), No (2), Year (2010-5) , Pages (208-216)

Title : ( Plant quality effects on intraguild predation between Orius laevigatus and Aphidoletes aphidimyza )

Authors: Mojtaba Hosseini , A. Ashour , A. Enkegaard , W. W. Weisser , Mehdi Nassiri Mahallati , S. H. Goldansaz , H. R. Sarraf Moayeri ,

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In order to understand the influence of plant quality on intraguild predation and consequently on the suppression of a shared prey population as well as on plant yield, the interactions between Aphis gossypii Glover (Hemiptera: Aphididae) (shared prey), Aphidoletes aphidimyza (Rondani) (Diptera: Cecidomyiidae) (intermediate predator), and Orius laevigatus Fieber (Hemiptera: Anthocoridae) (top predator) were investigated in 25-day experiments on cucumber [Cucumis sativus L.; (Cucurbitaceae)] at various N fertilization levels (90, 150, and 190 p.p.m.) in microcosm set-ups under greenhouse conditions. The final aphid population size was significantly affected by an interactive effect of N fertilization and predator. Regardless of the N fertilization levels, O. laevigatus alone was more effective in aphid suppression than A. aphidimyza alone. In addition, the risk for aphids of being predated upon by both predators together was significantly reduced in the low and medium N fertilization levels, whereas it was additive in the high N fertilization treatment. The A. aphidimyza population was suppressed by O. laevigatus in both the 90 and 150 p.p.m. N treatments. However, there was no intraguild predation of O. laevigatus on A. aphidimyza at the 190 p.p.m. N level. Total plant yield depended on predator treatments and N fertilization levels, with the highest yield produced at the 150 p.p.m. N fertilization level in treatments with either O. laevigatus alone or with both predators together. Our results demonstrate that the weak asymmetric intraguild predation among A. aphidimyza and O. laevigatus does not influence the ability of both predators together to diminish bottom-up effects on aphid populations and the yield losses associated with aphid infestations.

Keywords

, Aphis gossypii, biological control, pirate bug, gall midge, interactions, fertilization, nitrogen, Anthocoridae, Cecidomyiidae,
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@article{paperid:1014084,
author = {Hosseini, Mojtaba and A. Ashour and A. Enkegaard and W. W. Weisser and Nassiri Mahallati, Mehdi and S. H. Goldansaz and H. R. Sarraf Moayeri},
title = {Plant quality effects on intraguild predation between Orius laevigatus and Aphidoletes aphidimyza},
journal = {Entomologia Experimentalis et Applicata},
year = {2010},
volume = {135},
number = {2},
month = {May},
issn = {0013-8703},
pages = {208--216},
numpages = {8},
keywords = {Aphis gossypii; biological control; pirate bug; gall midge; interactions; fertilization; nitrogen; Anthocoridae; Cecidomyiidae; Aphididae},
}

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%0 Journal Article
%T Plant quality effects on intraguild predation between Orius laevigatus and Aphidoletes aphidimyza
%A Hosseini, Mojtaba
%A A. Ashour
%A A. Enkegaard
%A W. W. Weisser
%A Nassiri Mahallati, Mehdi
%A S. H. Goldansaz
%A H. R. Sarraf Moayeri
%J Entomologia Experimentalis et Applicata
%@ 0013-8703
%D 2010

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