Number of prey eaten by the third instar predator is much higher than the previous instar. The average number of predation third instar of larvae reached 439.35 during the period 3rd instar of larvae (3-4 days). The high number of prey eaten due to high nutrient needs during this period before entering the pupal period. A relative large body size (approximately 5-6 mm in length) require more food than younger instar period. First instar and second instar predators capable of consuming an average of 143.35 and 242.1 second instar nymphs of P. manihoti, during the period that is approximately 2-3 days. The average total number of predation from first instar to third instar P. ramburi could reach 824.80 second instar nymphs of P. manihoti. Potential predation P. ramburi relatively higher compared to other predatory species Crysopid as Chrysoperla sp were only able to prey on aphids 100-600 [7, 10, 14]