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Simbolon, S., Wahyuni, S.H. and Friska, M. 2024. Effect Of Combination Of Extracts Of Several Rhizomes On Mortality Of Armyworm (Spodoptera sp.) On Sweet Potato Plants (Ipomoea batatas L.). Jurnal Agricultural Science. 19, 2 (Nov. 2024), 33-36. DOI:https://doi.org/10.58222/jas.v19i2.283.