الوجود الموسمي، العوائل النباتية و الأعداء الحيوية لدودة البنجر السكري Spodoptera Exigua (Hub.)‎ (Lepidoptera : Noctuidae)‎ على السلق و البنجر السكري في مدينة أربيل

Abstract EN

A field experiment was conducted in Erbil city to study seasonal abundance, host plants and bio-enemies of beet armyworm Spodoptera exigua (Hub.) on sugar beet and chard during 20132014 season.

The results showed that few number of the insect was found during September, and then the number was increased gradually to reach their maximums which were 33 and 42.4 larvae per 10 leaves of chard and sugar beet plants respectively.

However the insect numbers were decreased progressively and disappeared from the field; they increased extremely to reach 32.4 and 50.8 larvae per 10 leaves of chard and sugar beet plants respectively during April-2013.

Furthermore, 20 species were recorded as host plants to beet armyworm including 18 economic crops and 2 wild plants, and all plants belonged to 6 plant families (Chenopodiaceae, Brassicaceae , Fabaceae , Compositae ,Solanaceae and Poaceae).

In addition, five species of predators were recorded belonging to Coccinellidae and Coleoptera, which were Coccinella undecimpunctata L., Coccinella novemnotata Herbst Hippodamia convergens Guerin-Meneville ,Thea vigintiduopunctata and Coccinella septempunctata L.

Also, aphid lion species of Chrysopidae and Chrysoperla carnea (Steph.) from Neuroptera were found.

However, the parasite was from Eulophidae family and Hymenoptera order, which was Euplectrus sp.