Population dynamics of Bactrocera oleae (Gmelin) (Diptera: Tephritidae) on olive tree in Algeria

Abstract

This work concerns the study of the population dynamics of Bactrocera oleae (Gmelin) (Diptera: Tephritidae) as a function of some biotic and abiotic factors on two varieties of olive tree Sigoise and Azeradj, located in Kabylia (Algeria). Yellow sticky traps are chosen for weekly sampling from October 13 to December 08, 2018.The inventory noted 1943 individuals of Bactrocera oleae, of which 1 422 individuals (73.19%) are captured on the Sigoise variety, three generations follow one another on this variety. Males outnumber females with Sex-ratio values of 1.14 on the Azeradj variety and 2.13 on the Sigoise variety. Concerning the parasitoid Psyttalia concolor (Szépligeti) (Hymenoptera: Braconidae), 156 individuals are captured on the two varieties, 90 individuals (57.69%) on the Azeradj variety. The largest catches of adults of Bactrocera olea, 192 on the Azeradj variety and 411 on the Sigoise variety are recorded at around 14.5 ° C and 60% RH.