The Efficacy of Ocimum gratissimum Leaf Powder and Ethanol Extract on Adult Periplanata americana under Laboratory Condition

Abstract

The efficacy of Ocimum gratissimum leaf powder and ethanol extract on adult Periplanata americana under laboratory condition was studied to control the nuisance of the pest. The mean mortality count of adult Periplanata americana was highest (84) in 50 g leaf powder and lowest (3) in the control. The highest mortality (125) was recorded in 96 hr exposure time while the lowest (17) was recorded in 24 h exposure time. 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 highest (104) in 50 ml ethanoic extract and lowest (1) in the control. The highest mortality (143) was recorded in 96 hr exposure time while the lowest (55) was recorded in 24 h exposure time. 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 O. gratissimum 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.