Quantifing Diversity and Phenology of Cereal Leaf Beetles Oulema Spp. (Chrysomelidae: Criocerinae) in Several Cereal Fields of Semi-Arid Zone, Algeria

The present study treated the taxonomic diversity of cereal leaf beetle (Oulema spp.) community subservient to several fields (barley, durum wheat and oats) in Eastern Algeria. From April June, which is appearance period these insects, fauna was weekly sampled using two trapping techniques: entomological net sight hunting method. Spatiotemporal alpha beta this were evaluated by ecological indices: Shannon index, Simpson index equitability. multivariate statistic test (GLM) used assess variation different parameters. Catches totaled 1144 individuals belonging genus Oulema four species: melanopus, cyanella, duftscmidi gallaeciana. highest abundance beetles recorded oats with 569 (49.73%), followed barley (390 individuals, 34.09%) (185 16.17%), whereas most speciose field (4 species), (3 species) (2 species). abundant species O. melanopus 746 (65.20% total). spectrum occurrence ranked constant first, common very accidental species. GLMs demonstrated that spp highly related type.