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  • 1
    Electronic Resource
    Electronic Resource
    Can the coffee berry borer (Hypothenemus hampei) reproduce by parthenogenesis? (1995)
    Springer
    Entomologia experimentalis et applicata 77 (1995), S. 351-354 
    Details
    ISSN: 1570-7458
    Keywords: Hypothenemus hampei ; Coleoptera ; Scolytidae ; parthenogenesis ; sexual reproduction ; spanandry ; coffee berry borer ; inbreeding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02383071
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  • 2
    Electronic Resource
    Electronic Resource
    Visual learning in larval Orius majusculus a polyphagous predator (1999)
    Springer
    Entomologia experimentalis et applicata 90 (1999), S. 103-107 
    Details
    ISSN: 1570-7458
    Keywords: learning ; Orius majusculus (Reuter) ; Heteroptera ; Anthocoridae ; predator ; biological control
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003587014243
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  • 3
    Electronic Resource
    Electronic Resource
    Production d'un hétéroptère prédateur:Orius majusculus [Het.; Anthocoridae] (1992)
    Springer
    BioControl 37 (1992), S. 249-252 
    Details
    ISSN: 1573-8248
    Keywords: Orius majusculus ; prédateur ; développement ; élevage de masse ; Orius majusculus ; predator ; development ; rearing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Summary Based upon the biotic potential presented byOrius majusculus Rt., it was possible to elucidate the optimal conditions for rearing of this insect. A diet based on eggs ofAnagasta kuehniella (Z.) and a sustrate for oviposition constitued by leaves of geranium (Pelargonium peltatum Soland. in Ait.) are adequate for growth and reproduction when temperature is between 15 and 25°C and photoperiod exceed 14 light for 24 h. An attempt was made as mass production. With little maintenance, minimal space and simple equipment, the mass rearing of this insect is highly satisfactory. Under our rearing conditions, one female yields about 20-adult-offspring in four weeks.
    Notes: Résumé En se fondant sur l'étude des potentialités biotiques d'Orius majusculus (Rt.), on a pu dégager les conditions optimales d'élevage de cet insecte. Avec une alimentation à base d'œufs d'Anagasta kuehniella (Z.) et un support de ponte constitué par des feuilles de géranium (Pelargonium peltatum Soland. in Ait.), l'élevage de ce prédateur donne un rendement suffisant s'il est mené entre 15 et 25 °C et sous une photopériode dépassant 14 h d'éclairement par 24 h. Pour une manipulation réduite, un appareillage peu sophistiqué et de faible encombrement, cet élevage donne des résultats satisfaisants. Dans les conditions de production adoptées, le coefficient de multiplication d'une femelle élevée pendant quatre semaines a été voisin de 20.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02372424
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  • 4
    Electronic Resource
    Electronic Resource
    Evidence for a marking pheromone in host discrimination byCephalonomia Stephanoderis (Hym.: Bethylidae) (1994)
    Springer
    BioControl 39 (1994), S. 363-366 
    Details
    ISSN: 1573-8248
    Keywords: Cephalonomia stephanoderis ; Bethylidae ; host discrimination ; marking pheromone ; superparasitism ; Hypothenemus hampei
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The bethylidCephalonomia stephanoderis Betrem is an ectoparasitoid that prefers to oviposit on the prepupae and pupae of the coffe berry borerHypothenemus hampei (Ferrari) (Coleoptera: Scolytidae). It has the ability to distinguish unparasitized from parasitized hosts and rarely lays more than one egg per host. The mechanism of this host discrimination byC. stephanoderis was investigated under laboratory conditions. For this, parasitoid eggs that had been deposited on host pupae were removed and pupae were then offered (individually and collectively) to individual female wasps. A total of 92% of individually offered hosts and 93% of collectively offered hosts were not parasitized. It is concluded thatC. stephanoderis recognizes a marking pheromone deposited into or onto the host, preceding, during, or after oviposition which enables female parasitoids to avoid self and conspecific superparasitism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02373041
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  • 5
    Electronic Resource
    Electronic Resource
    Bioecologie deEubazus semirugosus, coeloïdes abdominalis etC. sordidator [Hym.: Braconidae] parasites dePissodes notatus [Col.: Curculionidae] dans le sud de la France (1987)
    Springer
    BioControl 32 (1987), S. 39-47 
    Details
    ISSN: 1573-8248
    Keywords: Pinus pinaster ; Pissodes notatus ; Eubazus semirugosus ; Coeloïdes sordidator ; Coeloïdes abdominalis ; parasitisme ; cycle biologique ; Pinus pinaster ; Pissodes notatus ; Eubazus semirugosus ; Coeloïdes sordidator ; Coeloïdes abdominalis ; parasitism ; life cycle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Summary This study shows thatE. semirugosus is an endophagous egg-larval parasitoid ofP. notatus. After hatching, the parasitoid larva develops in thePissodes larva until the host has formed the pupal chamber. Therefore the complete development of this wasp is conditioned by the speed of the host development. In suitable laboratory conditions (19°C) or in the forests of southern France during the summer, the development requires approximately 2 months but is slower when the temperature is lower as in winter. Consequently, onP. notatus this braconid shows 2 generations a year, the 1st one emerging from April to the beginning of June and the 2nd one from the end of June up to mid-August. C. abdominalis andC. sordidator are observed as ectoparasites mainly on the 2nd and 3rd stages ofP. notatus, occasionally on the 4th one. At 19°C, the complete development requires 1 month. In field conditions the emergences occur continuously from April to August but arise from 4 successive overlapping broods, the 1st one resulting from diapausing pupae that appear in September and overwinter until spring. Despite the plurivoltinism manifested by these 3 parasitoids, their population sizes have always remained low. The main factor responsible for this weak parasitization effect onP. notatus is the unavailability of suitable host-stages when the females become able to oviposit, i.e. about 1 week after their emergence.
    Notes: Résumé Cette étude porte sur différents aspects de la biologie deE. semirugosus, C. sordidator etC. abdominalis, se développant surP. notatus, ravageur du Pin maritime: comportement parasitaire à l'égard de ce charançon, durée du développement, durée de la maturation sexuelle, espérance de vie des adultes, etc. Le cycle biologique de ces parasitoïdes est étudié ainsi que le problème de la coïncidence temporelle entre ces braconides et leur hôte dans le cas d'une forêt du sud de la France.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02390930
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  • 6
    Electronic Resource
    Electronic Resource
    Dynamique des populationsd'un ravageur des pins:Pissodes notatus F. [Col.: Curculionidae] II. — Rôle du parasitisme (1990)
    Springer
    BioControl 35 (1990), S. 119-126 
    Details
    ISSN: 1573-8248
    Keywords: Dynamique de population ; complexe parasitaire ; Pissodes notatus ; Pinus pinaster ; Population dynamics ; parasitoids complex ; Pissodes notatus ; Pinus pinaster
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Summary The present study was carried out to evaluate the impact of the parasitoidic complex on the population dynamics of the pine weevilPissodes notatus F. in a forest of southwestern France. From 1968 to 1977, the annual rate of total parasitism at weevil emergence did not fluctuate greatly, ranging mostly from 20 to 30%. The most frequently recorded parasitoids belonged to the generaEubazus andCoeloïdes, they both showed a density-dependent relationship with their common host; the ratio of their respective abundance remained almost constant during the ten seasons of observation. Based on the theoretical simulation of aP. notatus cohort during its development, the average mortality of the weevil due to the parasitoids was 16% VS an average parasitism rate reaching 28% at the time of emergence.
    Notes: Résumé L'étude examine l'influence du cortège parasitaire dans la dynamique des populations deP. notatus dans une forêt de pin maritime du sud-ouest de la France. De 1968 à 1977, le niveau du parasitisme apparent total à l'émergence a varié, mais est resté le plus souvent compris entre 20 et 30%. Les parasitoïdes les plus abondants appartenant aux genresEubazus etCoeloïdes se sont montrés densito-dépendants par rapport à leur hôte et le rapport entre leurs effectifs respectifs est resté assez constant au cours des 10 années d'observation. Un calcul basé sur l'évolution théorique des populations deP. notatus au vours de leur développement a permis d'estimer qu'en moyenne 16% seulement des charançons étaient détruits chaque année par l'ensemble des parasitoïdes alors que dans cet habitat le taux de parasitisme annuel moyen à l'émergence a été de 0,28.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02374308
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  • 7
    Electronic Resource
    Electronic Resource
    Bionomics of a polyphagous predator:Orius laevigatus (Het.: Anthocoridae) (1994)
    Springer
    BioControl 39 (1994), S. 33-40 
    Details
    ISSN: 1573-8248
    Keywords: Anthocoridae ; Orius laevigatus ; Heteroptera ; predution ; life cycle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé Les principales caractéristiques du développement pré-imaginal et imaginal ainsi que la reproduction d'Orius laevigatus sont étudiées à des températures de 15, 20, 25 et 30°C. La température influence considérablement le développement embryonnaire et post-embryoannaire de cette espèce. Le zéro théorique de développement se situe à 10,5°C. Les capacités reproductrices sont fortement perturbées à des températures inférieures à 15°C. Les résultats montrent queO. laevigatus est une espèce adaptée à des conditions thermiques relativement élevées. C'est entre 20 et 30°C, avec un optimum de 26°C, que s'expriment le mieux les capacités de développement et de reproduction de ce prédateur.
    Notes: Abstract The main characteristics of the imaginal and preimaginal development and the reproduction ofOrius laevigatus were studied at 15, 20, 25 and 30°C. Temperature greatly influences the developmental and reproductive biology of this species. The lowest developmental threshold is 10,6°C. Reproduction is greatly reduced at 15°C relative to the higher temperatures tested. O. laevigatus is well adapted to relatively high temperature conditions. The best development and reproduction rates are observed between 20 and 30°C with a theoretical optimum at 26°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02373492
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