Bioinsecticide activity of ethyl acetate extract of Nothaphoebe coriacea Kosterm bark against Spodoptera exigua larvae in a laboratory

Abstract Spodoptera exigua is a cosmopolitan and polyphagous pest. Botanical pesticides are an alternative technique to control S. . This study aimed evaluate the effect of ethyl acetate extract Nothaphoebe coriacea Kosterm bark (EEN) on biological activity larvae determine most effective concentration manage experiment was arranged single factor completely randomized design with level as factor. pesticide formulated from solvent in maceration extraction. The test carried out by dipping leaf mustard into treatment solution then feeding it 10 larvae. result showed EEN had 0.5% content bioactive alkaloids tannins groups. Mortality inhibition good responses test. However, mortality rate revealed different 0.5%. has 92% kill 3.6 individuals per hour, but low 72.82%. A botanical can be developed LC 50 obtained application 0.062%. potential pesticide.