Synergism activity between Moringa oleifera and Azadirachta indica crude extracts against Nilaparvata lugens (Hemiptera: Delphacidae) - Mohd Mohkheri, Muhammad Nabil Fariq (Universiti Kebangsaan Malaysia. Pusat Sistematik Serangga,National University of Malaysia. Centre for Insect Systematics, 2021)