“…Furthermore, the alkaloidal amides (piperanine, N-isobutyl (E, E)-2, 4 decadienamide and ∆α, β-dihydrowasanine) identified in this study have been shown to be toxic against Sistophilus oryzane (Su and Sondergam, 1980). Several studies on the insecticidal, larvicidal, repellant, antimicrobial and antifungal activities of the seeds of P. guineense have been reported (Ohigashi et al, 1983;Negbenebor et al, 1999;Ngane et al, 2003). Although, the use of plant extracts against fish parasites has not been widely studied, extracts of the leaf of P. guineense was applied for the treatment of trichodiniasis of Heterobranchus longifilis (Ekanem and Obiekezie, 2000).…”