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Preliminary observations on the effect of certain light conditions on the pupation of the olive fruit fly Dacus oleae (Gmelin) outside the fruit
Author(s) -
Tzanakakis M. E.
Publication year - 1964
Publication title -
zeitschrift für angewandte entomologie
Language(s) - French
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0044-2240
DOI - 10.1111/j.1439-0418.1964.tb02968.x
Subject(s) - dacus , pupa , biology , tephritidae , humanities , horticulture , larva , pest analysis , botany , art
Summary The possible effect of certain light conditions during the embryonic and larval stage, on the tendency of the olive fruit fly Dacus oleae (Gmelin) to pupate outside the fruit was investigated in three experiments. In the two of them full daylight, daylight of reduced intensity, and continuous darkness during the embryonic and larval stages were compared. The results indicate that, at 25° C there were no marked differences in pupation outside the fruit between the light combinations tried. In the third experiment a long (16 hour) and a short (10½ hour) photo‐period were compared, again under a constant temperature of 25° C. No marked differences in the percent of pupation outside the truit were found between the short — and the long — photoperiod groups. Résumé l'effect de certaines conditions d'illumination pendant les stades ovaire et larvaire de la mouche des olives Dacus oleae (Gmelin) sur le pourcentage des individus qui se transforment en pupes au dehors du fruit a été le but de trois experiences. Dans les deux premières experiences nous avons comparé la lumière normale du jour, la lumière du jour à intensité reduite, et l'obscurité continue durant les stades ovaire et larvaire. Les resultats ont indiqué qu'à une temperature constante de 25° C il n'y avait pas de differences considerables entre les divers groupes. Dans la troisième experience, nous avons comparé l'effet de deux photoperiodes differentes: une photoperiode courte de 10½ heures et une photoperiode longue de 16 heures à une temperature constante de 25° C. Dans ce cas aussi on n'a pas remarqué une difference considerable entre les deux groupes.

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