Effect of parent density on fecundity of two parasitoids [Hym.: Pteromalidae] of the olive beetle,Phloeotribus scarabaeoides [Col.: Scolytidae] |
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Authors: | M Campos R Gonzalez |
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Institution: | (1) Estación Experimental del Zaidín (C.S.I.C.) c/Profesor Albareda, 1 E-18008 Granada, Spain |
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Abstract: | Under laboratory conditions (22±2°C, 60%±5% H.R.; and 16L.: 8D. photoperiod), the rearing of the 2 main parasitoids ofPhloeotribus scarabaeoides (Bernard, 1788) in Southern Spain:Cheiropachus quadrum (Fabricius, 1787) andRaphitelus maculatus Walker, 1834 (Hym.: Pteromalidae) has been carried out. Several densities of population of the parasitoids have been tested in order to determine their reproductive
behaviour, and this is significant if the output of a rearing is to be increased. A great competition among the individuals
of the same sex has been observed; in the case of the ΦΦ, a potential negative correlation with the increase of density of
population, has been noted. The biotic potential belonging to the 2 principal parasitoids species with and without competition,
are calculated, and the aspects concerning the parasitoid colonization of the olive tree beetle infestation spots, are discussed.
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Keywords: | parasitoid rearing Cheiropachus quadrum Raphitelus maculatus biotic potential olive tree beetle |
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