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The host plants of beet armyworm spodoptera exigua huebner lepidoptera noctuidae and its occurrence



The host plants of beet armyworm spodoptera exigua huebner lepidoptera noctuidae and its occurrence



Korean Journal of Applied Entomology 30(2): 111-116



Larvae of beet armyworm, Spodoptera exigua are extremely polyphagous. A total of 42 host plants were identified in the field observations. Among them, vegetables were 13 species, upland crops 12 species, flowers 6 species, and others including weeds 11 species. The damage by beet armyworm was severe on Allium fistulosum in southern Chonnam. The percentage of hills damaged was 86% in Jindo, Chonnam and 1.92% in Sesan, Chungnam. Nomuraea rileyi and nuclear polyhedrosis virus were identified on the larvae of Spodoptera exigua in Allium fistulosum fields and the percentage of parasitization was 4.3 .apprx. 9.7% and 3.2%, respectively. Mortality of Spodoptera exigua larvae by Nomuraea rileyi in perilla was 13.4% in July 5, 28.9% in Aug. 7, and 18.5% in Sept. 10.

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