Dengue fever, spread by Aedes aegypti mosquitoes, presents major health dangers, particularly in tropical areas such as the Philippines, where more than 195,000 cases were documented by December 2023. This research examines the effectiveness of natural insecticide formulas made from lemongrass (Cymbopogon citratus) and malunggay (Moringa oleifera) extracts, studying their possible use as a safer option for artificial insecticides. The study aims to investigate the optimal ratios of these extracts (50:50, 75:25, and 25:75) and the influence of different spray frequencies (once, twice, thrice) on mosquito death rates. Employing a Completely Randomized Design (CRD), the research utilized the three spray trials (spray once, twice, thrice) to assess the efficiency of the three formulations in killing insects. Findings showed that there were no notable variations in effectiveness between the different treatments (p > 0.05), but treatment 3 (25:75 ratio) consistently displayed the fastest mortality rates, with an average time of 44.33 seconds to eradicate mosquitoes. On the other hand, treatment 2 showed the highest mean duration (66.66 seconds) with more fluctuations, suggesting inconsistency in its efficacy. This study emphasizes the possibility of utilizing lemongrass and malunggay as natural insecticides, providing communities and households with an eco-friendly way to fight dengue and reducing the dependence on dangerous chemicals. Further investigation is encouraged to explore more deeply the combined effects of these plants and how they can be practically used in pest management strategies.