Abundance and diversity of aphids (Hemiptera: Aphididae) and ladybirds (Coleoptera: Coccinellidae) population in alfalfa fields of Yasouj, southwestern Iran
عنوان دوره: دومین کنگره بین المللی حشره شناسی ایران
نویسندگان
چکیده
Alfalfa (Medicago sativa L.) is a perennial plant that is native to Southwest Asia. It has been cultivated for forage longer than any other crop. Diversity indices provide information about community composition. Diversity indices are measured by species richness (the total number of species present) and species evenness (the distribution of the individuals within species designations); therefore, it could give us more ecological information rather than a simple species list in the fields. During 2015–2016, abundance and diversity of alfalfa aphids and coccinellid species were monitored in alfalfa fields of Yasouj. Samplings were conducted with 150 plants in the alfalfa fields from mid-February to late August. Species richness was measured using Shannon and Simpson indices. In this study, six aphids and five coccinellid species were collected and identified. Among the collected aphid species, Aphis fabae and Therioaphis maculata were most abundant in the fields. For coccinellids, Coccinella septempunctata L. was the most abundant species. Highest aphid species diversity was observed on 23 July 2015.
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