Effect of powdered leaves tamarindus indica and eucalyptus camaldulensis in control of cowpea storage pest

This is a laboratory trial to further test the efficiency of the production of leaves of Eucalyptus camaldulensis and Tamarindus indica in the control of Callosobruchus maculatus, a storage cowpea insect pest. Two cowpea varieties Dan’ila and 207-15 were introduced into glass container containing the test material. The glass container was replicated thrice and arranged in randomized block design for 41 days at temperature between 240c – 28oc and 41% - 70% humidity. The result obtained at three days post treatment shows that Eucalyptus caused significant adult mortality compared to that of Tamarind and rates of Oviposion between the checks of the individual treatment at p = 5% were no significant. Result obtained at one week post treatment shows adult mortality in both Dan’ila and 207-15 treated with Tamarind sample is more significant then Eucalyptus treated sample. The result Obtained at two weeks post treatment show egg count was significantly suppressed by the Eucalyptus treated sample then followed by Tamarind treated sample. The differences in progeny emergence between the checks and treatment level were found to be significant at 35 days post treatment. Number of infested seed was high in Dan’ila and 207-15 treated with Tamarind then those treated with Eucalyptus. Also the grains damage were highly significant in Dan’ila treated samples and 207-15 treated with Tamarind. At 40 days post treatment, progeny emergence, seeds infestation and loss in weight of grain were significantly suppressed by Eucalyptus treated sample then Tamarind. Eucalyptus shown greater capacity to suppress large build up of this insect in cowpea grains. Thus it can be concluded that the Eucalyptus powder produced a much better protection against the stored cowpea insect Callosobruchus maculatus then Tamarindus indica.