Tewolde, F., Alemnew Fantaye, Bereket Ali and Alamyhu Ayele 2026. Spray Frequency Determination and Efficacy of Synthetic Insecticides against Pea Aphid (Acyrthosiphon pisum) on Lentil (Lens culinaris) in Central Highlands of North Shewa, Ethiopia. Andalasian International Journal of Entomology. 4, 2 (Oct. 2026), 87–98. DOI:https://doi.org/10.25077/aijent.4.2.87-98.2026.