Diversity and population fluctuations of thrips (Thysanoptera: Thripidae) on carrot crops in M'sila region (Algeria)

Abstract

This study aimed to assess the diversity and population fluctuationsof thrips associated with carrot crops in M'Sila region (Northeast Algeria). The study was conducted from February to June 2024. Samples were taken twice a month using sticky traps and basins, with each trap type represented in two colors (yellow and blue). The fauna recorded in this work comprises of seven species belonging to four families. The family Thripidae was the most represented, with three taxa, followed by the Aeolothripidae, with two species. The families Melanthripidae and Phlaeothripidae each comprised a single species. Population monitoring revealed two major peaks, the first on April 21 and the second on May 20, reflecting seasonal activity patterns. Trap color preferences varied by species, with F. occidentalis predominantly attracted to blue traps, while A. fasciatus and T. tabaci preferred yellow traps. Diversity indices indicated low overall diversity reflecting the codominance of key species.