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| dct:title
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| dct:abstract
| - Observations on the biology of Cheiropachus quadrum (Hym : Pteromalidae) and Dendrosoter protuberans (Hym : Braconidae), were conducted. Both species are the main parasites of the olive bark beetles Hylesinus varius and Phloeotribus scarabaeoides (Col : Scolytidae) in the South of Spain. Results have shown that an increase in body size of the host does not imply an increase in parasite efficiency. In fact, host size inversely affects parasite efficiency for C. quadrum. Bearing in mind this fact, the abundance of the host and the ease of its rearing in the lab, it is therefore advisable to use P. scarabaeoides as the host for mass rearing of the parasites studied here. On the other hand, the presence of white light is a negative factor for parasite longevity and fecundity. The pupae and all larval instars are parasitised. C. quadrum does not have a preference for any particular stage or larval instar of the host whilst there is a preference for the third and fifth larval instar by D. protuberans. With respect to the sex ratio of parasites, an increase in the number of males increases the fecundity of the females. The results obtained in this study can be considered essential in the development of a biological control system for olive bark beetle pests based on an increase in the population of C. quadrum and D. protuberans.
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| bibo:abstract
| - Observations on the biology of Cheiropachus quadrum (Hym : Pteromalidae) and Dendrosoter protuberans (Hym : Braconidae), were conducted. Both species are the main parasites of the olive bark beetles Hylesinus varius and Phloeotribus scarabaeoides (Col : Scolytidae) in the South of Spain. Results have shown that an increase in body size of the host does not imply an increase in parasite efficiency. In fact, host size inversely affects parasite efficiency for C. quadrum. Bearing in mind this fact, the abundance of the host and the ease of its rearing in the lab, it is therefore advisable to use P. scarabaeoides as the host for mass rearing of the parasites studied here. On the other hand, the presence of white light is a negative factor for parasite longevity and fecundity. The pupae and all larval instars are parasitised. C. quadrum does not have a preference for any particular stage or larval instar of the host whilst there is a preference for the third and fifth larval instar by D. protuberans. With respect to the sex ratio of parasites, an increase in the number of males increases the fecundity of the females. The results obtained in this study can be considered essential in the development of a biological control system for olive bark beetle pests based on an increase in the population of C. quadrum and D. protuberans.
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| dct:bibliographicCitation
| - Campos, M. & Lozano, C. 1994. Observations on the reproductive biology of two parasites of Hylesinus varius and Phloeotribus scarabaeoides (Col.: Scolytidae): Cheiropachus quadrum (Hym.: Pteromalidae) and Dendrosoter protuberans (Hym.: Braconidae). <em>Entomophaga</em>, 39(1): 51-59.
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