MUSA, M. A. EFFICACY OF SELECTED PLANT EXTRACT AGAINST MAJOR INSECT PEST ON TWO (2) VARIETIES OF COWPEA (Vigna unguiculataea L. Walp) IN GUINEA SAVANNAH OF NIGERIA. Nigerian Journal of Agriculture and Agricultural Technology, [S. l.], v. 6, n. 2A, p. 301–308, 2026. Disponível em: https://njaat.com.ng/index.php/njaat/article/view/1635. Acesso em: 30 jun. 2026.