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- W2032631736 abstract "Résumé L'activité reproductrice d'une souche de Caryedon serratus provenant de stocks d'arachide a été étudiée au Congo dans des conditions de température et d'hygrométrie simulant celles d'un grenier paysan ainsi qu'à la température constante de 30 °C. L'ovogénèse est stimulée, quoique faiblement, par la présence de gousses de la plante hôte. La présence du mâle est sans effet sur l'ovogénèse. La présence de gousses d'arachide n'a pas d'influence sur la copulation; la femelle est généralement réceptive dès qu'un premier ovocyte est parvenu à maturité. La ponte est fortement stimulée par la présence d'une gousse d'arachide. La rétention ovocytaire est très faible chez les femelles inséminées, même en l'absence de gousse. On observe chez les femelles vierges une rétention des ovocytes dans les oviductes latéraux, qui s'accompagne apparemment d'une résorption partielle; environ un tiers des œufs est néanmoins émis. A 30 °C, des femelles régulièrement nourries de pollen présentent une fécondité moyenne d'environ 650 œufs; le maximum observé est de 1457 œufs. La longévité moyenne de ces femelles est d'environ trois mois, mais certaines vivent près de six mois, en l'absence de toute diapause. Summary Effect of groundnut pods (Arachis hypogea) and imaginai feeding on oogenesis, mating and oviposition in the seed beetle Caryedon serratus Reproductive activity in a strain of Caryedon serratus originating from groundnut stores was studied in Congo under humidity, temperature and daylength conditions similar to those prevailing in farmers' stores as well as at constant 30 °C. Oogenesis was slightly stimulated in the presence of unshelled groundnuts. The presence of males did not affect oogenesis. Groundnuts had no effect on mating. Females usually became sexually receptive after a first oocyte had matured. Oviposition by virgin females was strongly stimulated by the presence of nuts. Oocyte retention was very low in inseminated females, even in the absence of groundnuts. Virgin females exhibited oocyte retention in lateral oviducts, apparently together with resorption. Egg chorions were occasionnally observed in the bursa copulatrix of old virgin females, but no proof is given of the existence of resorption mechanisms in that gland. About one third of the eggload was eventually laid. At 30 °C, the fecundity of inseminated and regularly pollen-fed females was about 650 eggs. Maximum lifetime egg production was 1457. These females had a mean length of life of about three months, and some individuals survived almost six months, with no sign of diapause." @default.
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- W2032631736 date "1989-10-01" @default.
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- W2032631736 title "Influence des gousses d'arachide (Arachis Hypogea) et de l'alimentation imaginale sur l'ovogénèse, l'accouplement et la ponte chez la bruche Caryedon Serratus" @default.
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- W2032631736 doi "https://doi.org/10.1111/j.1570-7458.1989.tb01278.x" @default.
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