Evaluation of the Efficacy of Mixed Powders of Piper Guineense and Zingiber Officinale against Callosobruchus Maculatus (F.) (Coleoptera: Bruchidae)
[1]
Akunne C. E. , Department of Zoology, Nnamdi Azikiwe University Awka, Anambra State, Nigeria.
[2]
Afonta C. N. , Department of Zoology, Nnamdi Azikiwe University Awka, Anambra State, Nigeria.
[3]
Mogbo T. C. , Department of Zoology, Nnamdi Azikiwe University Awka, Anambra State, Nigeria.
[4]
Ononye B. U. , Department of Zoology, Nnamdi Azikiwe University Awka, Anambra State, Nigeria.
[5]
Ngenegbo U. C. , Department of Parasitology & Entomology, Nnamdi Azikiwe University Awka, Anambra State, Nigeria.
Powders prepared from two plant species, Piper guineense and Zingiber officinale were used against adult cowpea weevil, Callosobruchus maculatus (Fab.) on cowpea grains. The powders of Piper guineense and Zingiber officinale were applied separately and in mixtures in the ratios of Zg0%:Pg100%, Zg100%:Pg0%, Zg20%:Pg80%, Zg80%:Pg20% and Zg50%:Pg50% respectively. They were evaluated under ambient laboratory conditions (30±3◦C and 75±3%). Mortality of adult C. maculatus at 24, 48 and 72hrs after treatment were recorded and compared with the control. All concentrations recorded higher mortality than the control except the mixture with the ratio Zg20%:Pg80%. The powder application at Pg100% proportion caused the highest mortality, during the exposure period. However, no significant difference exist (P>0.05) in the mortality count of adult C. maculatus between the various powder applications and the control.
Evaluation, Vigna Unguiculata, Piper Guineense, Zingiber Officinale, Callosobruchus Maculatus
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