Effects of chemical- and bio-fertilizers on cowpea resistance to cowpea weevil, Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae)

摘要: Abstract The cowpea weevil, Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae) is a destructive pest of grains in the field and storage. Effects two chemical fertilizers (triple superphosphate (TSP) urea) three bio-fertilizers (Bradyrhizobium japonicum, Pseudomonas putida mycorrhizal fungi) compared to control were studied on resistance pod grain C. maculatus. Pod was evaluated as oviposition preference, egg-to-adult survival developmental time, measured life history table parameters pest. Cowpea plants treated with tested grown under condition. Then, full-size green pods their immature harvested used experiments. highest preference percentage adults emergence (untreated) ones. longest times recorded obtained from TSP B. japonicum treatments. In most cases, significant differences observed for C. maculatus examined fertilizers. Delayed time when fed P. putida- B. japonicum-treated grains. lowest number eggs laid by each female (fecundity) treatments, respectively. net reproductive rate (R0), intrinsic increase (rm) finite (λ) fertilized urea. Our results showed that can be suggested utilize, an alternative fertilizers, minimize infestation These findings could helpful developing integrated management cowpea.