On the Identity of Cereal Aphid Parasitoid Wasps Aphidius uzbekistanicus, Aphidius rhopalosiphi, and Aphidius avenaphis (Hymenoptera: Braconidae: Aphidiinae) by Examination of COI Mitochondrial Gene, Geometric Morphometrics, and Morphology

2011 ◽  
Vol 104 (6) ◽  
pp. 1221-1232 ◽  
Author(s):  
K. Kos ◽  
A. Petrović ◽  
P. Starý ◽  
N. G. Kavallieratos ◽  
A. Ivanović ◽  
...  
Keyword(s):  
Geometric Morphometrics ◽  
Mitochondrial Gene ◽  
Parasitoid Wasps ◽  
Cereal Aphid ◽  
Aphid Parasitoid ◽  
Aphidius Rhopalosiphi

Flying with a ‘death sentence’ on board: electrophoretic detection of braconid parasitoid larvae in migrating winged grain aphids, Sitobion avenae (F.)

2011 ◽  
Vol 101 (4) ◽  
pp. 443-449 ◽  
Author(s):  
M.P. Walton ◽  
H.D. Loxdale ◽  
L.J. Allen-Williams
Keyword(s):  
Fungal Infection ◽  
Fungal Pathogens ◽  
Polyacrylamide Gel Electrophoresis ◽  
Sitobion Avenae ◽  
Aphidius Ervi ◽  
Death Sentence ◽  
Cereal Aphid ◽  
Aphid Parasitoid ◽  
Aphidius Rhopalosiphi ◽  
Population Structure And Dynamics

AbstractPolyacrylamide gel electrophoresis of enzymes (carboxylesterases) was used for the first time to monitor rates of parasitism in airborne alate (winged) grain aphid, Sitobion avenae (F.) population samples collected by suction trapping in Hertfordshire, UK. Using previously described electrophoretic ‘keys’, the species of hymenopterous parasitoids present in individual aphids were identified and found to be Aphidius ervi (Haliday) and/or Aphidius rhopalosiphi (De Stephani Perez) (Braconidae). Entomophthoralean fungal infection was also detected using this approach. Aphidiid wasp parasitism was detected from early June to mid-August and fungal infection from late June to late July. The results are discussed in relation to parasitoid population structure and dynamics, especially (i) the fact that winged aphids passively transport the early stages of their braconid parasitoids and fungal pathogens, potentially to newly-founded colonies, which may directly impact on the dual aphid-parasitoid populations genetics; and (ii) the approach used to collect and assay parasitised and fungal infected aphids involving both suction trapping and electrophoretic testing may have potential in assessing the level and efficacy of these biological control agents in integrated pest management (IPM) schemes to combat cereal aphid outbreaks.

scholarly journals A survey of aphid parasitoids and hyperparasitoids (Hymenoptera) on six crops in the Kurdistan Region of Iraq

2021 ◽  
Vol 81 ◽  
pp. 9-21
Author(s):  
Srwa K. Bandyan ◽  
Ralph S. Peters ◽  
Nawzad B. Kadir ◽  
Mar Ferrer-Suay ◽  
Wolfgang H. Kirchner
Keyword(s):  
Broad Bean ◽  
Sweet Pepper ◽  
Parasitoid Wasps ◽  
Kurdistan Region ◽  
Crop Species ◽  
Aphid Parasitoid ◽  
Aphidius Rhopalosiphi ◽  
Aphid Parasitoids ◽  
First Time ◽  
Eleven Species

In this study, we surveyed aphids and associated parasitoid wasps from six important crop species (wheat, sweet pepper, eggplant, broad bean, watermelon and sorghum), collected at 12 locations in the Kurdistan region of Iraq. A total of eight species of aphids were recorded which were parasitised by eleven species of primary parasitoids belonging to the families Braconidae and Aphelinidae. In addition, four species of hyperparasitoids (in families Encyrtidae, Figitidae, Pteromalidae and Signiphoridae) were recorded. Aphelinus albipodus (Hayat & Fatima, 1992), A. flaviventris (Kurdjumov, 1913), A. varipes (Förster, 1841) (Aphelinidae), Aphidius rhopalosiphi (De Stefani, 1902), A. uzbekistanicus (Luzhetzki, 1960), (Braconidae) and Alloxysta arcuata (Kieffer, 1902) (Figitidae) were recorded in Iraq for the first time. The results represent the first survey of these interactions in this region and form the basis for understanding crop-aphid-parasitoid-hyperparasitoid networks and for future biological control actions.

CONSPECIFIC SUPERPARASITISM IN TWO PARASITOID WASPS, APHIDIUS ERVI HALIDAY AND APHELINUS ASYCHIS WALKER: REPRODUCTIVE STRATEGIES INFLUENCE HOST DISCRIMINATION

1991 ◽  
Vol 123 (6) ◽  
pp. 1229-1237 ◽  
Author(s):  
B. Bai
Keyword(s):  
Reproductive Strategies ◽  
Acyrthosiphon Pisum ◽  
Aphidius Ervi ◽  
Parasitoid Wasps ◽  
Host Discrimination ◽  
Larval Competition ◽  
Parasitoid Species ◽  
Aphid Parasitoid ◽  
Aphelinus Asychis ◽  
Physiological Suppression

AbstractConspecific host discrimination and larval competition in two aphid parasitoid species were studied in the laboratory using the pea aphid, Acyrthosiphon pisum (Harris) (Homoptera: Aphididae), as a host. Aphidius ervi Haliday (Hymenoptera: Aphidiidae) used internal host cues to discriminate between unparasitized and conspecific parasitized hosts. When only parasitized hosts were available, females oviposited into recently parasitized ones where their progeny had a good chance to survive, but rejected those parasitized ≥24 h earlier where their offspring normally died. Competitions occurred only after both eggs had hatched. Larvae eliminated supernumeraries by means of physical combat and physiological suppression. In Aphelinus asychis Walker (Hymenoptera: Aphelinidae), factors, or changes in host internal condition, associated with hatching of the first egg resulted in suppression of conspecific competitors which could be in either larval or egg stage. The older larvae always won competitions through physiological means. A wasp’s oviposition decision is shown to be influenced by the probability of its progeny’s survival. Species that have different reproductive strategies may respond differently to identical host conditions.

scholarly journals Species composition and richness of aphid parasitoid wasps in cotton fields in northern China

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Fan Yang ◽  
Yue-Kun Wu ◽  
Lei Xu ◽  
Qian Wang ◽  
Zhi-Wen Yao ◽  
...  
Keyword(s):  
Species Composition ◽  
Northern China ◽  
Parasitoid Wasps ◽  
Aphid Parasitoid ◽  
Cotton Fields

Tritrophic effects of organic and conventional fertilisers on a cereal-aphid-parasitoid system

2010 ◽  
Vol 134 (3) ◽  
pp. 211-219 ◽  
Author(s):  
Michael P. D. Garratt ◽  
Simon R. Leather ◽  
Denis J. Wright
Keyword(s):  
Cereal Aphid ◽  
Aphid Parasitoid ◽  
Tritrophic Effects
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