International Journal of Research Studies in Educational Technology
Divine Word College of San Jose Special Issue
Volume 10, Issue Number 1
Available Online: 2 April 2026
Author/s:
Santos, Matthea Andrina G.*
Divine Word College of San Jose, Philippines (Santosmatthea19@gmail.com)
Mangabat, Daniella C.
Jugao, Hannah Shae G.
Dela Cruz, Agatha Nillyze O.
Alvarado, Amerie Lyonne A.
Bacorro, King Alfred G.
Ortega, Khenn Ivan C.
Bautista, Josephine N.
Galay-Limos, Jenny A.
Rodil, Maria Victoria B.
Abstract:
This study examined the efficacy of a plant-based biopesticide formulated from the leaves of tsaang-gubat (Carmona retusa), Neem (Azadirachta indica), and soursop (Annona muricata) in managing pests threatening pechay (Brassica rapa) plants. This research was designed to assess how different levels of a biopesticide formulation may reduce pest-induced crop loss (such as wilted leaf area and pest feeding) and to identify the most effective level for this purpose. A quantitative true experimental design was used, in which the experimental groups received various biopesticide formulations, while the control group received water. During the establishment growth period, the plants were monitored, and information on insect activity and plant health was methodically documented and examined. The results showed that the formulated biopesticide at higher concentrations reduced insect damage and leaf withering more effectively than the control group and lower concentrations. The results show that the combination of these plant extracts has a significant impact as a natural and eco-friendly substitute for synthetic pesticides. By using locally available plant resources, the study promotes sustainable farming methods and provides small-scale farmers with an affordable pest management option. The study shows that plant-based biopesticides can effectively protect crops while reducing the environmental and human health impacts of synthetic pesticides.
Keywords: biopesticide, pest control, pechay, neem, soursop, tsaang-gubat
DOI: https://doi.org/10.5861/ijrset.2026.26006
Cite this article:
Santos, M. A. G., Mangabat, D. C., Jugao, H. S. G., Dela Cruz, A. N. O., Alvarado, A. L. A., Bacorro, K. A. G., Ortega, K. I. C., Bautista, J. N., Galay-Limos, J. A., & Rodil, M. V. B. (2026). Neem (Azadirachta indica), soursop (Annona muricata), and tsaang-gubat (Carmona retusa) leaves as a biopesticide for pechay (Brassica rapa) plants. International Journal of Research Studies in Educational Technology, 10(1), 83-94. https://doi.org/10.5861/ijrset.2026.26006
* Corresponding Author