Kirkuk University Journal for Agricultural Sciences (KUJAS)

Seasonal Abundance, Host Plants And Bio-Enemies Of Beet Armyworm Spodoptera Exigua (Hub.) (Lepidoptera: Noctuidae) On Chard And Sugar Beet In Erbil City

https://doi.org/10.58928/ku18.09209
Volume 9, Issue 2
Spring 2018
Page 51-58
Kirkuk University Journal for Agricultural Sciences (KUJAS)

Document Type : Research Paper

Authors

Zayoor zainel omar
Juhina Adres M. Ali

University of Mosul College of Agriculture and Forestry

Abstract
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 2013
2014 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.

Keywords

Sugar Beet
Seasonal Abundance
Host Plants
Subjects

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