The Toxic Effect Of Tested Oils Against Cowpea Weevil Case Study
RESULTS
1. The toxic effect of tested oils against cowpea weevil:
Data in Table (1) indicated that the concentrations(10,50, 100, 500, 1000 mg/kg) of the three oils were significantly inhibited the females of C. maculatus from laying eggs on treated cowpea seeds compared to control treatment and 10 ppm concentrations of the tested oils (LSD 5% = 19.8). The highest reduction percentages in the numbers of laid eggs were (76.1, 83.4, and 91.2 %) at the treatments of olive oil, peanut oil and linseed oil, respectively under 1000 mg/kg concentration in comparison with untreated check.
Regarding to the hatching percentages of the eggs, there were no significant differences between all concentrations of evaluated oils and check except 1000 mg/kg …show more content…
Effect of the tested insecticides against cowpea weevil:
Data presented in Table (2) indicated that all the concentrations of the two insecticide (abamectin and malathion) were significantly inhibited the females of C. maculatus from laying eggs on cowpea seeds in comparison with untreated (LSD 5% = 16.6),while there were no significant differences between the highest concentrations of malathion (100, 500, 1000 mg/kg) . The highest reduction percentages in the numbers of laid eggs were (98.3 %) at the treatments of malathion under 1000 mg/kg concentration in comparison with untreated check. Regarding to the hatching percentages of the eggs, there were significant differences between the highest concentrations of abamectin (100, 500, 1000 mg/kg) and untreated check (LSD 5% = 5.5). The least hatchability percentages were recorded at malathion treatment of 1000 ppm resulting 63 % comparing with 99 % at check …show more content…
The highest reduction percentage in the numbers of emerged adults was recorded at the treatment of abamectin and malathion treatments at 1000 mg/kg recording 96.9 and 96 %, respectively. Table (2) Effect of abamectin and malathion concentrations on eggs, hatchability, emerged adults, and food consumption of C. maculatus infested treated cowpea seeds
Concentration
(mg/kg) Mean no. laid eggs/female Reduction% Hatchability
(%) mean no of emerged adults Reduction % Weight loss of
1. The toxic effect of tested oils against cowpea weevil:
Data in Table (1) indicated that the concentrations(10,50, 100, 500, 1000 mg/kg) of the three oils were significantly inhibited the females of C. maculatus from laying eggs on treated cowpea seeds compared to control treatment and 10 ppm concentrations of the tested oils (LSD 5% = 19.8). The highest reduction percentages in the numbers of laid eggs were (76.1, 83.4, and 91.2 %) at the treatments of olive oil, peanut oil and linseed oil, respectively under 1000 mg/kg concentration in comparison with untreated check.
Regarding to the hatching percentages of the eggs, there were no significant differences between all concentrations of evaluated oils and check except 1000 mg/kg …show more content…
Effect of the tested insecticides against cowpea weevil:
Data presented in Table (2) indicated that all the concentrations of the two insecticide (abamectin and malathion) were significantly inhibited the females of C. maculatus from laying eggs on cowpea seeds in comparison with untreated (LSD 5% = 16.6),while there were no significant differences between the highest concentrations of malathion (100, 500, 1000 mg/kg) . The highest reduction percentages in the numbers of laid eggs were (98.3 %) at the treatments of malathion under 1000 mg/kg concentration in comparison with untreated check. Regarding to the hatching percentages of the eggs, there were significant differences between the highest concentrations of abamectin (100, 500, 1000 mg/kg) and untreated check (LSD 5% = 5.5). The least hatchability percentages were recorded at malathion treatment of 1000 ppm resulting 63 % comparing with 99 % at check …show more content…
The highest reduction percentage in the numbers of emerged adults was recorded at the treatment of abamectin and malathion treatments at 1000 mg/kg recording 96.9 and 96 %, respectively. Table (2) Effect of abamectin and malathion concentrations on eggs, hatchability, emerged adults, and food consumption of C. maculatus infested treated cowpea seeds
Concentration
(mg/kg) Mean no. laid eggs/female Reduction% Hatchability
(%) mean no of emerged adults Reduction % Weight loss of