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. njaat [Internet]. 2026 Jun. 12 [cited 2026 Jun. 30];6(2A):301-8. Available from: https://www.njaat.com.ng/index.php/njaat/article/view/1635