Étude de quelques facteurs de variation de la fécondité chez Trichogramma maidis Pintureau et Voegele (Hym. Trichogrammatidae)

Pintureau, Bernard; Babault, Manuel; Voegelé, Jean

doi:10.1051/agro:19810409

Cited by 18 publications

(11 citation statements)

References 6 publications

(7 reference statements)

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“…T. cordubensis was described by Vargas and Cabello (1985) which obtained this species from eggs of Helicoverpa armigera Hü bner in Spain. It was also found in Morocco and Algeria on eggs of the carob moth (E. ceratoniae) as well as of H. armigera (Pintureau and Babault, 1988) and was obtained in Portugal from noctuid eggs (Silva et al, 1999;Gonçalves et al, 2006). The first description of T. bourarachae was based on specimens who originated in Morocco and had been collected from eggs of H. armigera (Pintureau and Babault, 1988).…”

Section: Discussionmentioning

confidence: 99%

“…It was also found in Morocco and Algeria on eggs of the carob moth (E. ceratoniae) as well as of H. armigera (Pintureau and Babault, 1988) and was obtained in Portugal from noctuid eggs (Silva et al, 1999;Gonçalves et al, 2006). The first description of T. bourarachae was based on specimens who originated in Morocco and had been collected from eggs of H. armigera (Pintureau and Babault, 1988). It is also known from Portugal from noctuid eggs (Silva et al, 1999;Gonçalves et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

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Egg parasitoids of the genus Trichogramma (Hymenoptera, Trichogrammatidae) in olive groves of the Mediterranean region

Herz¹,

Hassan²,

Hegazi

et al. 2007

Biological Control

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A survey of egg parasitoids of the genus Trichogramma (Hymenoptera, Trichogrammatidae) was carried out in olive groves in Portugal, Greece, Egypt, and Tunisia during the years 2002-2004. Parasitoids were obtained either by exposing sentinel eggs (Sitotroga cerealella Olivier or Ephestia kuehniella Zeller) on olive trees or by collecting eggs of lepidopterous olive pests. Parasitized egg samples were reared separately in the laboratory for emergence of parasitoids. These were further reared in separate lines and processed by morphological and molecular biology techniques for species characterization. The recorded fauna of Trichogramma parasitoids in olive groves was species poor and consisted of species mainly known from the Mediterranean region. Trichogramma bourarachae Pintureau and Babault was found in Tunisia and Egypt, T. cordubensis Vargas and Cabello, and T. euproctidis Girault in Egypt, Trichogramma cacoeciae Marchal in Portugal, Greece, Egypt, Tunisia and Trichogramma nerudai Pintureau and Gerding in Portugal. Apart from that, Trichogramma oleae Voegelé and Pointel was collected in Tunisia. This species is probably not indigenous, but has established after several releases of a French strain were made in recent years. For selected strains, the sequence of the internal transcribed spacer 2 (ITS-2) region of rDNA was determined and deposited in the GenBank database. Differences in important biological attributes were found among collected strains of T. bourarachae, suggesting the existence of biotypes. The results contribute to the limited knowledge on distribution and biodiversity of the genus Trichogramma in the Mediterranean region. They can be helpful for the preservation and use of indigenous Trichogramma species in biological control of lepidopterous pests in olive and other local crops.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Egg parasitoids of the genus Trichogramma (Hymenoptera, Trichogrammatidae) in olive groves of the Mediterranean region

Herz¹,

Hassan²,

Hegazi

et al. 2007

Biological Control

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“…To make better use of these two biological control agents, a comparative study was undertaken to obtain a better understanding of egg development during the immature and the adult stages of the two parasitoids. In this study, instead of assessing fecundity by the usual method of counting the number of parasitized host eggs (Pintureau et al, 1981), batches of female parasitoids were dissected so that egg numbers could be counted before and after the first bout of oviposition.…”

Section: Key-words : Trichogramma Cacoeciae Trichogramma Brassicae mentioning

confidence: 99%

Ovarian cycle in immature and adult stages ofTrichogramma cacoeciae andT. Brassicae (Hym.: Trichogrammatidae)

Volkoff¹,

Daumal²

1994

Entomophaga

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“…For all calculations, we considered only the inseminated females (producing both male and female offspring), since the features of reproduction may be different in virgin females (Pintureau et al, 1981). Females that escaped or were killed accidentally were not counted in the longevity analysis but were considered for other parameters if they were lost after day 10.…”

Section: Infestation Of Hosts Host Parasitization Was Mea-mentioning

confidence: 99%

Effects of temporary host deprivation on the reproductive potential of Trichogramma brassicae

Fleury

Boulétreau

1993

Entomologia Exp Applicata

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The effect of host deprivation on the reproductive potential and parasitization behaviour of Trichogramma brassicae Bezdenko (Hymenoptera: Trichogrammatidae) was investigated. Upon emergence, females were deprived of hosts for one to four days, and were subsequently provided with an unlimited number of hosts. Regardless of its duration, deprivation did not affect female longevity, overall rate of progeny emergence, or progeny sex-ratio. As deprivation time increased, however, the total number of parasitized hosts decreased from an average of 81.2 when hosts were provided at emergence, to an average of 34.0 when the waiting time was 4 days. This reduction was mainly due to the reduction in the parasitizations following the first laying peak, which was not affected when deprivation lasted fewer than 4 days. Trichogramma females are able to store ripe eggs (about 35) for 3 days without damage, but resorption occurs after four days of deprivation. Our results suggest that imaginal vitellogenesis occurs in this proovigenic wasp but that it is affected by host deprivation. The behaviour of females, as measured by the average distance between all parasitized hosts, was also modified by host deprivation. When deprivation exceeded one day, parasitizations were more scattered over the host patch. Moreover, increased deprivation times also appeared to delay the initiation of parasitization by a few hours.Host shortage is likely to occur in nature, reducing the efficiency of Trichogramma as a biocontrol agent.The individual history of females must be taken into account in any study of the reproductive strategies of parasitoid females.

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Étude de quelques facteurs de variation de la fécondité chez Trichogramma maidis Pintureau et Voegele (Hym. Trichogrammatidae)

Cited by 18 publications

References 6 publications

Egg parasitoids of the genus Trichogramma (Hymenoptera, Trichogrammatidae) in olive groves of the Mediterranean region

Egg parasitoids of the genus Trichogramma (Hymenoptera, Trichogrammatidae) in olive groves of the Mediterranean region

Ovarian cycle in immature and adult stages ofTrichogramma cacoeciae andT. Brassicae (Hym.: Trichogrammatidae)

Effects of temporary host deprivation on the reproductive potential of Trichogramma brassicae

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