Results 161 to 170 of about 3,980 (192)

Effects of honeydew sugar composition on the longevity of Aphidius ervi

Entomologia Experimentalis et Applicata, 2007
AbstractFeeding on sugar‐rich foods such as nectar and honeydew is important for survival of many adult parasitoids. Especially in agricultural systems, honeydew is often the most prevalent carbohydrate source. However, relative to plant nectar, honeydew may be relatively unsuitable, as a result of an unfavourable sugar composition or the presence of ...
Hogervorst, Petra A. M., Wäckers, Felix L., Romeis, Jörg   +2 more
openaire   +2 more sources

Pea aphid clonal resistance to the endophagous parasitoid Aphidius ervi

Journal of Insect Physiology, 2002
The physiological mechanism of resistance to the endophagous braconid Aphidius ervi Haliday (Hymenoptera, Braconidae) by a pink clone (PC) of Acyrthosiphon pisum (Harris) (Homoptera, Aphididae) has been investigated. Comparative data on parasitoid development and associated host biochemical changes in the resistant PC aphids and in a susceptible green ...
LI S., FALABELLA P., GIANNANTONIO S., FANTI P., BATTAGLIA D., DIGILIO, MARIA CRISTINA, VOLKL W., SLOGGETT J. J., WEISSER W., PENNACCHIO, FRANCESCO   +9 more
openaire   +4 more sources

Leucine transport by the larval midgut of the parasitoid Aphidius ervi (Hymenoptera)

Journal of Insect Physiology, 2010
The larval midgut of the hymenopteran parasitoid Aphidius ervi accomplishes a large transport of nutrients from the lumen to the haemocoel, providing most of the organic molecules necessary for rapid insect development. l-amino acids in general, and leucine in particular, are efficiently accumulated in the larval body.
L. Fiandra, S. Caccia, B. Giordana, M. Casartelli   +3 more
openaire   +3 more sources

Reproductive strategies of Aphidius ervi Haliday (Hymenoptera: Aphidiidae)

Biological Control, 2008
Abstract Hymenopteran parasitoids are usually arrhenotokous parthenogenetic, where females arise from fertilized and males from unfertilized eggs. Therefore, the reproductive fitness of females is a function of egg production and furthermore affected by mating, whereas that of males is mainly determined by the number of daughters they father ...
Xiong Zhao He, Qiao Wang
openaire   +1 more source

Host regulation by the aphid parasitoid Aphidius ervi: the role of teratocytes

Entomologia Experimentalis et Applicata, 2000
AbstractThe biochemical profile and metabolism of Acyrthosiphon pisum (Harris) (Homoptera, Aphididae) are markedly altered and redirected in response to parasitization by the endophagous braconid Aphidius ervi Haliday (Hymenoptera, Braconidae). In the present study, the role played in the host regulation process by teratocytes, cells deriving from the ...
P. Falabella, E. Tremblay, PENNACCHIO, FRANCESCO   +2 more
openaire   +3 more sources

Development and nutrition of the braconid wasp,Aphidius ervi in aposymbiotic host aphids

Archives of Insect Biochemistry and Physiology, 1999
This study aims at evaluating whether the bacterial endosymbionts of the pea aphid, Acyrthosiphon pisum (Harris), may be of any nutritional importance to the endophagous braconid parasitoid Aphidius ervi Haliday. Aposymbiotic aphids, obtained by rifampicin treatment on artificial diet, were parasitized, and both parasitoid development and major changes
PENNACCHIO, FRANCESCO, P. Fanti, P. Falabella, DIGILIO, MARIA CRISTINA, F. Bisaccia, E. Tremblay   +5 more
openaire   +2 more sources

Host regulation effects of ovary fluid and venom of Aphidius ervi (Hymenoptera: Braconidae)

Journal of Insect Physiology, 1998
The host regulation effects of venom and ovary fluid of the endophagous braconid Aphidius ervi Haliday on the pea aphid, Acyrthosiphon pisum (Harris), have been studied. Extracts of ovaries and of venom glands were injected into nonparasitized 4th instar pea aphids, both separately and mixed. Aphids treated with parasitoid material died as 4th instars,
DIGILIO, MARIA CRISTINA, PENNACCHIO, FRANCESCO, E. Tremblay   +2 more
openaire   +3 more sources

Biochemical and metabolic alterations in Acyrthosiphon pisum parasitized by Aphidius ervi

Archives of Insect Biochemistry and Physiology, 1995
AbstractBiochemical and metabolic alterations in Acyrthosiphon pisum (Harris) (Homoptera: Aphididae) parasitized by the endophagous Aphidius ervi Haliday (Hymenoptera: Braconidae) are reported. Total ecdysteroid titer was determined by radioimmunoassay.
PENNACCHIO, FRANCESCO, DIGILIO, MARIA CRISTINA, E. Tremblay   +2 more
openaire   +2 more sources

Bottom-up effect of water stress on the aphid parasitoid Aphidius ervi

Entomologia Generalis, 2018
Parasitoids inhabiting agro-ecosystems may be largely affected by bottom-up forces, notably owing to abiotic stresses, and this may modulate parasitoids preference (host acceptance) and/or their performance (host suitability). The availability of water is a key factor impacting plant quality and in determining changes in plant-insect community ...
Nguyen, Le Thu Ha, Monticelli, Lucie, Desneux, Nicolas, Métay-Merrien, Christiane, Amiens-Desneux, Edwige, Lavoir, Anne Violette   +5 more
openaire   +3 more sources

Functional analysis of a fatty acid binding protein produced by Aphidius ervi teratocytes

Journal of Insect Physiology, 2012
Aphidius ervi (Hymenoptera, Braconidae) is an endophagous parasitoid of various aphid species, including Acyrthosiphon pisum (Homoptera, Aphididae), the model host used in the present study. Parasitized hosts show a marked increase of their nutritional suitability for the developing parasitoid larvae.
Caccia L., Grimaldi A., Casartelli M., Falabella P., de Eguileor M., Pennacchio F., Giordana B.   +6 more
openaire   +4 more sources