Results: Figure 1; Repellent activity in percentage of the volatile extract of C. sinensis, C. limon, C. aurantifolia and positive control on Camponotus nearcticus. The activity was generally high on C. nearcticus with positive control recording 100% activity, C. limon having 95% and C. sinensis having the lowest activity of 82.5% activity.
Figure 2; Observed percentage lethal activity of the volatile extracts on C. nearcticus at five concentration points after 180 minutes of exposure time. At 5% w∕v concentration, C. sinensis recorded the least activity of 22% toxicity whiles C. aurantifolia recorded the highest activity of 50% toxicity at same level of concentration. C. limon and positive control had 36% toxicity at this 5% w∕v level of concentration. C. Aurantifolia and C. sinensis levels out at 10% w∕v concentration and a sharp rise to over 90% toxicity. C. limon and Magic chalk had steep increase in toxicity as the concentration increased from 5% w∕v to 80% w∕v.
Figure 3; Expected lethal activity as projected by probit analyzer for the volatile extracts on C. nearcticus at five concentration levels after 180 minutes of exposure time. C. sinensis showed a low level of activity below 50% when the concentration level was below 17% w∕v. There was a 50% killing activity at 17% w∕v concentration level. C. aurantifolia, magic chalk and C. …show more content…
aurantifolia or 86.01% of the positive control. C. sinensis and C. limon also recorded LC99 values of 66.43% w∕v and 71.01% w∕v respectively. C. aurantifolia recorded the highest activity at low concentration with the lowest LC50 value of 4.54% w∕v and C. sinensis recorded the lowest activity at low concentration with LC50 of 17.02% w∕v. The reverse was realized at high concentrations with LC99 for C. aurantifolia being 99.4% w∕v and LC99 for C. sinensis being 66.5% w∕v
Figure 2; Observed percentage lethal activity of the volatile extracts on C. nearcticus at five concentration points after 180 minutes of exposure time. At 5% w∕v concentration, C. sinensis recorded the least activity of 22% toxicity whiles C. aurantifolia recorded the highest activity of 50% toxicity at same level of concentration. C. limon and positive control had 36% toxicity at this 5% w∕v level of concentration. C. Aurantifolia and C. sinensis levels out at 10% w∕v concentration and a sharp rise to over 90% toxicity. C. limon and Magic chalk had steep increase in toxicity as the concentration increased from 5% w∕v to 80% w∕v.
Figure 3; Expected lethal activity as projected by probit analyzer for the volatile extracts on C. nearcticus at five concentration levels after 180 minutes of exposure time. C. sinensis showed a low level of activity below 50% when the concentration level was below 17% w∕v. There was a 50% killing activity at 17% w∕v concentration level. C. aurantifolia, magic chalk and C. …show more content…
aurantifolia or 86.01% of the positive control. C. sinensis and C. limon also recorded LC99 values of 66.43% w∕v and 71.01% w∕v respectively. C. aurantifolia recorded the highest activity at low concentration with the lowest LC50 value of 4.54% w∕v and C. sinensis recorded the lowest activity at low concentration with LC50 of 17.02% w∕v. The reverse was realized at high concentrations with LC99 for C. aurantifolia being 99.4% w∕v and LC99 for C. sinensis being 66.5% w∕v