Efficacy of Azadirachta indica Leaf Powder and Ethanol Extract on Adult Periplanata americana under Laboratory Condition

摘要

The efficacy of Azadirachta indica leaf powder and ethanol extract on adult Periplanata americana under laboratory condition to control the nuisance of the pest. The mean mortality count of adult Periplanata americana was the highest (92) in 50 g leaf powder and the lowest (2) in the control. The result also showed that the highest mortality (125) was recorded in 96 hr exposure time while the lowest (28) was recorded in 24 h exposure time. The Analysis of Variance (ANOVA) for the mean mortality in the experiment and the control indicated that there was significant difference (P-value = 0.05) in the mortality with increase in grams and exposure time of leaf powder and the control at 5% level of significance the mean mortality count of adult P. americana was the highest (108) in 50 ml ethanoic extract an d the lowest (3) in the control. The result also showed that the highest mortality (144) was recorded in 96 hr exposure time while the lowest (66) was recorded in 24 h exposure time. The Analysis of Variance (ANOVA) for the mean mortality in the experiment and the control indicates that there is significant difference (P-value = 0.05) in the mortality with increase in grams and exposure time of leaf powder and the control at 5% level of significance. The efficacy of Azadirachta indica Ethanol extract is more than the leaf powder. There was significant difference in mortality in both increase in concentration levels and exposure time at 5% level of significance in both leaf powder and ethanol extract.