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http://dx.doi.org/10.5656/KSAE.2008.47.2.155

Toxicological Effects of Some Insecticides against Welsh Onion Beet Armyworm (Spodoptera exigua)  

Kang, E.J. (Dept. Applied Biology, College of Agriculture and Life Sciences, Chungnam National University)
Kang, M.G. (Dept. Applied Biology, College of Agriculture and Life Sciences, Chungnam National University)
Seo, M.J. (Dept. Applied Biology, College of Agriculture and Life Sciences, Chungnam National University)
Park, S.N. (Dept. Applied Biology, College of Agriculture and Life Sciences, Chungnam National University)
Kim, C.U. (BASF Agro Company LTD)
Yu, Y.M. (Dept. Applied Biology, College of Agriculture and Life Sciences, Chungnam National University)
Youn, Y.N. (Dept. Applied Biology, College of Agriculture and Life Sciences, Chungnam National University)
Publication Information
Korean journal of applied entomology / v.47, no.2, 2008 , pp. 155-162 More about this Journal
Abstract
The Welsh onion beet armyworm, Spodoptera exigua (Hubner), has attacked Welsh onion and is now the most important pest of Welsh onion in southwestern Korea. The beet armyworm has a wide host range, occurring as a serious pest of vegetable and fields. The relatively high abundance of beet armyworm has stimulated frequent application of insecticides to foliage. Insecticide resistance is a major problem in management of this insect. Accordingly, pesticide application for the control of beet armyworm was tried in both the open field and in laboratory, using 4 synthetic compounds such as metaflumizone and chlorfenapyr, indoxacarb, flufenoxuron, emamectin benzoate. In the laboratory, each developmental stages from eggs, larva to pupa was tested against 4 insecticides. Against the eggs of welsh onion beet armyworm, there was no significantly different with each other. These tested chemicals no killing effect to eggs. However, the population of 1st larva hatched from eggs were reduced because they eaten the egg shell with residual insecticides. The tested insecticides were taken very high mortalities to 1st to 3rd larva of Welsh onion beet armyworm. Otherwise, there were decreased the death rate from 4th to 6th larva. On the other hand, their value of control effects were relatively good against Welsh onion beet armyworms in the field between 87.2 and 90.5% on 10 days after insecticide application.
Keywords
Welsh onion beet armyworm; Metaflumizone; Chlorfenapyr; Indoxacarb; Flufenoxuron; Emamectin benzoate; Spodoptera exigua;
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