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Insecticidal Activity of Leaf Extracts of Calotropis gigantea L, Ageratum conyzoides L, and Vitex negundo L. Against Spodoptera frugiperda J. E. Smith (Lepidoptera: Noctuidae)
The Species Composition of Phytoplankton and Nutrient Content in the Nipa Nypa fruticans Ecosystem on the West Coast of Aceh, Indonesia