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Parasitoid- and Hyperparasitoid-Mediated Seasonal Dynamics of the Cabbage Aphid (Hemiptera: Aphididae)

Overview of attention for article published in Environmental Entomology, January 2015
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Title
Parasitoid- and Hyperparasitoid-Mediated Seasonal Dynamics of the Cabbage Aphid (Hemiptera: Aphididae)
Published in
Environmental Entomology, January 2015
DOI 10.1603/en14155
Pubmed ID
Authors

Mohammad Reza Nematollahi, Yaghoub Fathipour, Ali Asghar Talebi, Javad Karimzadeh, Myron Philip Zalucki

Abstract

The population dynamics of the cabbage aphid, Brevicoryne brassicae (L.), its parasitoid, Diaeretiella rapae McIntosh, and hyperparasitoids, Pachyneuron spp., were quantified under field conditions during 2011-2013, by examining synchronization, parasitoid: aphid ratio, possible effect of density on the finite rate of increase, and spatial coincidence. The rates of parasitism and hyperparasitism were based on rearing field-collected mummies and live parasitized aphids, and density of the aphid were estimated using heat extraction and subsampling techniques. Only one parasitoid, D. rapae (80% on average), and two hyperparasitoid species from the genus of Pachyneuron (6.5% on average), namely Pachyneuron aphidis (Bouché) and Pachyneuron groenlandicum (Holmgren), were reared from the aphid mummies. Significant Pearson's time lagged correlations for percentage parasitism versus aphid density and for percentage hyperparasitism versus mummy density indicated that 2-3 wk is needed for D. rapae and Pachyneuron spp. to show impact on their respective host's population. In early spring, the parasitoid: aphid ratio was low (0.11 on average) while aphid density was increasing. Based on Taylor's power law, D. rapae and Pachyneuron spp., as well as B. brassicae, had an aggregated distribution among canola plants. Moreover, a high degree of spatial overlap was found between D. rapae and B. brassicae and between Pachyneuron spp. and D. rapae. In general, the parasitoid had good spatial coincidence with its aphid host but because of a lack of parasitoid-host synchronization and low parasitoid: aphid ratio, impact on the host population was low.

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Geographical breakdown

Country Count As %
Unknown 25 100%

Demographic breakdown

Readers by professional status Count As %
Professor 5 20%
Researcher 4 16%
Student > Ph. D. Student 4 16%
Professor > Associate Professor 3 12%
Student > Doctoral Student 2 8%
Other 3 12%
Unknown 4 16%
Readers by discipline Count As %
Agricultural and Biological Sciences 17 68%
Environmental Science 1 4%
Unknown 7 28%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 12 December 2014.
All research outputs
#20,656,161
of 25,373,627 outputs
Outputs from Environmental Entomology
#1,608
of 2,170 outputs
Outputs of similar age
#268,062
of 360,127 outputs
Outputs of similar age from Environmental Entomology
#14
of 32 outputs
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