Pheromone-mediated mating in the aphid parasitoid,Aphidius nigripes (hymenoptera: Aphididae)

1995 ◽  
Vol 21 (7) ◽  
pp. 959-972 ◽  
Author(s):  
Jeremy N. McNeil ◽  
Jacques Brodeur
Keyword(s):  
Aphid Parasitoid ◽  
Aphidius Nigripes

Honeydew as a source of host-searching kairomones for the aphid parasitoid Aphidius nigripes (Hymenoptera: Aphidiidae)

1984 ◽  
Vol 62 (8) ◽  
pp. 1513-1520 ◽  
Author(s):  
Yves Bouchard ◽  
Conrad Cloutier
Keyword(s):  
Filter Paper ◽  
Initial Response ◽  
Response Level ◽  
Aphid Parasitoid ◽  
Potato Plants ◽  
Treated Area ◽  
Aphidius Nigripes ◽  
Locomotory Behavior ◽  
High Concentrations ◽  
Aphid Honeydew

The parasitoid Aphidius nigripes spent more time searching on potato plants previously infested with aphids than on fresh plants, suggesting the presence of searching stimulants on infested plants. Water extracts of aphid honeydew applied to the surface of foliage or to filter paper discs increased searching time and affected the locomotory behavior of parasitoids. When crossing a honeydew-treated area on filter paper, female parasitoids exhibited arrestment, antennal examination, abdominal protraction, reduced walking speed, and increased turning. Upon losing contact with honeydew-contaminated substrate, parasitoids often exhibited a klinotactic response which drove them back to the treated area. The time spent by individual parasitoids within a honeydew-treated area on filter paper decreased with successive visits, but the initial response level was restored when the insect was prevented from contacting honeydew for 1 h. The retention response exhibited by parasitoids contacting a honeydew-treated area increased with honeydew concentration, but levelled off at high concentrations. Naive parasitoids were more responsive to the retention effect of honeydew than experienced individuals.

Host discrimination in the aphid parasitoid Aphidius nigripes

1984 ◽  
Vol 62 (7) ◽  
pp. 1367-1372 ◽  
Author(s):  
Conrad Cloutier ◽  
Lothar A. Dohse ◽  
France Bauduin
Keyword(s):  
Time Dependent ◽  
Macrosiphum Euphorbiae ◽  
Time Interval ◽  
Host Discrimination ◽  
Initial Attack ◽  
Aphid Parasitoid ◽  
Potato Aphid ◽  
Aphidius Nigripes ◽  
Best Fitting ◽  
Increasing Function

Females of the solitary aphid parasitoid Aphidius nigripes do not consistently avoid superparasitizing their hosts, the potato aphid Macrosiphum euphorbiae. Tests were conducted in which two attacks separated by a time interval ranging from 1 to 24 h were allowed per host. No evidence of host discrimination was found when the interval was <2 h. For longer intervals, host discrimination was an increasing function of the length of the interval up to 24 h after the initial attack. Various mathematical models, permitting time-related rejection of parasitized hosts, were used to simulate the parasitoids–host distributions following two attacks. The best fitting models also had to incorporate time-dependent discrimination against hosts that had been attacked but not successfully parasitized. The results are discussed with respect to possible mechanisms of host discrimination in A. nigripes and its significance in intraspecific competition.

Two new species of the genus Areopraon Mackauer, 1959 (Hymenoptera: Braconidae: Aphidiinae) from the Russian Far East

Zootaxa ◽  
2021 ◽  
Vol 4985 (1) ◽  
pp. 131-136
Author(s):  
ELENA M. DAVIDIAN ◽  
SERGEY A. BELOKOBYLSKIJ
Keyword(s):  
New Species ◽  
Russian Far East ◽  
Far East ◽  
Aphid Parasitoid ◽  
Two New Species ◽  
The Russian Far East

Two new species of the aphid parasitoid genus Areopraon Mackauer, 1959, A. tricolor Davidian, sp. nov. and A. vladivostoki Davidian, sp. nov., are described and illustrated from the fauna of the Russian Far East. 

scholarly journals Tomato Below Ground–Above Ground Interactions: Trichoderma longibrachiatum Affects the Performance of Macrosiphum euphorbiae and Its Natural Antagonists

2013 ◽  
Vol 26 (10) ◽  
pp. 1249-1256 ◽  
Author(s):  
Donatella Battaglia ◽  
Simone Bossi ◽  
Pasquale Cascone ◽  
Maria Cristina Digilio ◽  
Juliana Duran Prieto ◽  
...  
Keyword(s):  
Tomato Plant ◽  
Integrated Control ◽  
Macrosiphum Euphorbiae ◽  
Aphidius Ervi ◽  
Aphid Parasitoid ◽  
Trichoderma Longibrachiatum ◽  
Indirect Defenses ◽  
Plant Growth Promoting ◽  
Below Ground ◽  
Species Specific

Below ground and above ground plant–insect–microorganism interactions are complex and regulate most of the developmental responses of important crop plants such as tomato. We investigated the influence of root colonization by a nonmycorrhizal plant-growth-promoting fungus on direct and indirect defenses of tomato plant against aphids. The multitrophic system included the plant Solanum lycopersicum (‘San Marzano nano’), the root-associated biocontrol fungus Trichoderma longibrachiatum strain MK1, the aphid Macrosiphum euphorbiae (a tomato pest), the aphid parasitoid Aphidius ervi, and the aphid predator Macrolophus pygmaeus. Laboratory bioassays were performed to assess the effect of T. longibrachiatum MK1, interacting with the tomato plant, on quantity and quality of volatile organic compounds (VOC) released by tomato plant, aphid development and reproduction, parasitoid behavior, and predator behavior and development. When compared with the uncolonized controls, plants whose roots were colonized by T. longibrachiatum MK1 showed quantitative differences in the release of specific VOC, better aphid population growth indices, a higher attractiveness toward the aphid parasitoid and the aphid predator, and a quicker development of aphid predator. These findings support the development of novel strategies of integrated control of aphid pests. The species-specific or strain-specific characteristics of these below ground–above ground interactions remain to be assessed.

scholarly journals Morphometric indicators for quality assessment in the aphid parasitoid, Lysiphlebus fabarum (Braconidae: Aphidiinae)

2013 ◽  
Vol 110 (3) ◽  
pp. 519-525 ◽  
Author(s):  
Mohammad AMERI ◽  
Arash RASEKH ◽  
J.P. MICHAUD ◽  
Hossein ALLAHYARI
Keyword(s):  
Quality Assessment ◽  
Aphid Parasitoid
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