Hastuti, L. D. S. ., Nicklin, J. . and Siregar, A. Z. . (1) “Two Entomophagous Isolated From Sumatera Utara; Potential As Biocontrol Agent Againts Nematode”, Jurnal Online Pertanian Tropik, 3(1), pp. 43- 51. doi: 10.32734/jopt.v3i1.2955.