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Comparative biological studies on two species of predatory beetles of the genusCybocephalus [Col.: Cybocephalidae]

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Abstract

The development, reproduction and longevity ofCybocephalus micans Reitter andC. nigriceps nigriceps (Sahlberg) were studied under controlled laboratory conditions. The data obtained explain the distribution of the 2 predators in different climatic regions of Israel. Under constant temperatures ranging between 16° and 36° C, the duration of development of the egg. larva and pupa of the 2 species became shorter as the temperature increased. For each developmental stage, at each temperature tested, the mean duration of development ofC. n. nigriceps was higher than that ofC. micans. The average time needed for completion of a generation at 28° C was about 39 days forC. micans, as compared with 56 days forC. n. nigriceps. Progeny production of both cybocephalid species was higher and adult longevity was longer at 28° C than at 32° C.

Résumé

Le développement, la reproduction et la longévité deCybocephalus micans Reitter etC. nigriceps nigriceps (Sahlberg) ont été étudiés au laboratoire dans des conditions contrôlées. Les résultats obtenus expliquent la distribution des 2 prédateurs dans différentes régions climatiques d'Israël. A des températures constantes variant de 16° à 36° C, la durée du développement de l'œuf, de la larve et de la nymphe des 2 espèces est d'autant plus courte que la température augmente. Pour chaque stade, la durée de développement deC. n. nigriceps est plus longue que celle deC. micans. Le délai moyen d'une génération à 28° C est d'environ 39 j. pourC. micans au lieu de 56 j. pourC. n. nigriceps. La descendance des 2 espèces et la longévité imaginale sont plus importantes à 28° C qu'à 32° C.

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Authors and Affiliations

  1. Division of Entomology, Agricultural Research Organization The Volcani Center, Bet Dagan, Israel

    D. Blumberg & E. Swirski

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  1. D. Blumberg
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  2. E. Swirski
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Contribution from the Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel. No. 141-E, 1981 series.

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Blumberg, D., Swirski, E. Comparative biological studies on two species of predatory beetles of the genusCybocephalus [Col.: Cybocephalidae] . Entomophaga 27, 67–76 (1982). https://doi.org/10.1007/BF02371939

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