Oviposition behaviour ofEphedrus cerasicola [Hym.: Aphidiidae] parasitizing different instars of its aphid host

  title={Oviposition behaviour ofEphedrus cerasicola [Hym.: Aphidiidae] parasitizing different instars of its aphid host},
  author={Trond Hofsvang and Eline Benestad H{\aa}gvar},
The parasitoidEphedrus cerasicola Starý oviposited in all 4 nymphal instars and in newly moulted adults ofMyzus persicae (Sulzer). The different host categories were offered with no choice. The duration of an oviposition increased with the age of nymphs, being about 13, 18, 21, 22, and 17 s from 1 st instars to adults, respectively. Observations of number of stabbing attacks prior to oviposition, percent of the encounters not resulting in oviposition, time from first encounter to oviposition… 

Parasitism byEphedrus cerasicola [Hym.: Aphidiidae] developing in different stages ofMyzus persicae [Hom.: Aphididae]

Development and reproduction of unparasitized and parasitized aphids at 21°C were compared and host age at parasitization had a slight effect on the parasitoid's developmental rate and had no effect on egg or pupal survival, or on the sex ratio of the emerging parasitoids.

Foraging Behavior ofPraon volucre(Hymenoptera: Braconidae) a Parasitoid ofSitobion avenae(Hemiptera: Aphididae) on Wheat

The results suggested that P. voluvre has the potential to be a biocontrol agent of S. avenae, however, evaluation of foraging behavior warrants further investigation under field conditions.

Life table of Aphelinus paramali Zehavi & Rosen, 1989 (Hymenoptera: Aphelinidae), a parasite of the melon aphid, Aphis gossypii Glover, 1877 (Hemiptera, Aphididae)

As density of host increased, the number of parasitized aphid also increased till a certain density level, and then this level reached a stabile parasitism and showed type II, and the relationship between A. gossypii and parasitoid was investigated.

Influence of host behavior and host size on the success of oviposition ofCotesia urabae andDolichogenidea eucalypti (Hymenoptera: Braconidae)

  • G. Allen
  • Biology
    Journal of Insect Behavior
  • 2005
By rearing or thrashing immediately prior to an encounter with a parasitoid, mid and large larvae decreased the likelihood of being parasitized by up to 50%.

The effect of choice and no-choice access on host (Aphis fabae) instars preference, in different ages and sizes of Lysiphlebus fabarum (Hymenoptera: Braconidae: Aphidiinae)

Host instar preference of the thelytokous strain of Lysiphlebus fabarum was studied in relation to progeny performance in choice and no-choice experiments, and offsprings emerging from hosts that were parasitized as the first instar stage were smaller and took longer to develop.

Collective Defense of Aphis nerii and Uroleucon hypochoeridis (Homoptera, Aphididae) against Natural Enemies

Obs observations of natural aphid colonies revealed that a collective twitching and kicking response (CTKR) was frequently evoked during oviposition attempts of the parasitoid wasp Aphidius colemani and during attacks of aphidophagous larvae, suggesting that visual signals in combination with twitching-related substrate vibrations may play an important role in synchronising defense among members of a colony.

Recognition of heterospecific parasitism: Competition between Aphidiid (Aphidius ervi) and Aphelinid (Aphelinus asychis) parasitoids of Aphids (Hymenoptera: Aphidiidae; Aphelinidae)

It is suggested that competition for host resources incurs a cost, for the winner in terms of reduced size or increased development time and for the loser in Terms of lost progeny and searching time and that heterospecific host discrimination can be functional.

Host stage preference, functional response and mutual interference of Aphidius matricariae (Hym.: Braconidae: Aphidiinae) on Aphis fabae (Hom.: Aphididae)

Host stage preference, functional response and mutual interference of Aphidius matricariae (Haliday), parasitoid of the black bean aphid, Aphis fabae Scopoli and Aphididae were investigated in a growth chamber at a temperature of 25°C, 65% relative humidity and a photoperiod of 16’h“light : 8 h dark on the PP8 variety of sugar beet.

Comparative studies on populations of Pauesia juniperorum (Hymenoptera: Braconidae), a biological control agent for Cinara cupressivora (Hemiptera: Aphididae)

Pauesia juniperorum (Starý), a solitary endoparasitoid which attacks several Cinara spp.

Effect of Native and Non-native Hosts on the Biology of Acerophagus papayae Noyes and Schauff, the Introduced Parasitoid of Paracoccus marginatus Williams and Granara De Willink

The results showed significant differences in bioecology of parasitoid on their natal host compared with the non-natal hosts and parasitoids showed a similar high fitness on both natal and non natal hosts.



Superparasitism and host discrimination byEphedrus cerasicola [Hym.: Aphidiidae], an aphidiid parasitoid ofMyzus persicae [Hom.: Aphididae]

A non-random larval distribution indicated that E. cerasicola discriminates between unparasitized and parasitized aphids, but probably not between aphids with different numbers of parasitoid eggs.


The rate of embryonic development is shown as a major factor in contest-type competition between first-stage larvae in intraspecific and interspecific competition between adults and juveniles.

Functional responses to prey density ofEphedrus cerasicola [Hym.: Aphidiidae], an aphidiid parasitoid ofMyzus persicae [Hom.: Aphididae]

The functional responses of the parasitoidEphedrus cerasicola Starý parasitizingMyzus persicae (Sulzer) on a paprika plant, were studied for single females at different host densities during 3 different time periods (1 hr, 6 hrs, 24 hrs) at 21 °C.


Abstract The reproductive and demographic statistics of Aphidius smithi Sharma & Subba Rao parasitizing third-instar pea aphids, Acyrthosiphon pisum Harris, were determined under constant laboratory

Host discrimination in the aphid parasitoid Aphidius nigripes

Females of the solitary aphid parasitoid Aphidius nigripes do not consistently avoid superparasitizing their hosts, the potato aphid Macrosiphum euphorbiae, and various mathematical models were used to simulate the parasitoids–host distributions following two attacks.

Oviposition preferences of a hymenopterous parasite for certain instars of its aphid host

When the seven available instars and morphs of the aphid were exposed together to oviposition by its hymenopterous parasite, the numbers of eggs laid were highest in the nymphal instars, particularly in third instar hosts.


Aphidius rhopalosiphi produced 212 offspring on average but in one case 509 deposited eggs were found, indicating a certain degree of host discrimination.

Aspects of host—parasitoid interactions of two aphid parasitoids, Aphidius urticae (Haliday) and Aphidius uzbeckistanicus (Luzhetski) (Hymenoptera, Aphidiidae)

Abstract. 1. Various aspects were studied of two host‐parasitoid interactions: Aphidius urticae parasitizing the cocksfoot aphid Hyalopteroides humilis and Aphidius uzbeckistanicus parasitizing the

Bionomics and ecology ofEphedrus pulchellusstelfox an important parasite of leaf-curling aphids in Czechoslovakia, with notes on the diapause (Hym. Aphidiidae)

Ce fait est un cas typique de l'adaptation d'un parasite au cycle évolutif de son hôte: la période estivale pendant laquelle l'habitat est dépourvu d'hôte acceptable pour le parasite est passée à l'état de diapause par cclui-ci.

Limitation of superparasitism by Aphidius rhopalosiphi: a consequence of aphid defensive behaviour

Abstract. 1. The behavioural mechanisms limiting superparasitism by Aphidius rhopalosiphi (DeStefani‐Perez) are described.