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Sulaiman Ginting; S. Edy Sumantri; Fenty Maimunah Simbolon; Syamsafitri. INCREASING THE EFFECTIVENESS OF SOME TYPES OF ATTRACTANTS THROUGH SEVERAL TYPES OF DISPENSERS AGAINST FRUIT FLY PESTS (Bactrocera Spp. ) ON GUAVA PLANTS (Psidium Guajava L. ). MEDALION 2021, 2, 188-196.