Abstract:
Recent trend for the control of insect pests has been towards the use of substances of plant origin. Toxicity and residual effects of yellow-berried nightshade, Solanum surrattense Burm. leaves extract were determined against adults of red flour beetle, Tribolium castaneum (Herbst) by contact method during a period of 8-days under laboratory condition. The lowest mortality 15% was observed at the minimum dose 2.4 μl/cm2 and the highest 100% was observed at the maximum 16.8 μl/cm2 after 24 h. The LD50 of S. surrattense was found 8.02 μl/cm2. Finally, residual effects of the same plant extract was observed, during 1st day, mortality, the lowest was 49.4% at minimum 2.4 μl/cm2 dose and the highest mortality was 91.6% at maximum 12.0 μl/cm2 dose. During 7th day, mortality, the lowest was 5.0% at 2.4 μl/cm2 and the highest was 60.5% at 12.0 μl/cm2. During 8th day, mortality, the lowest was 0.4 % at 2.4 μl/cm2 and the highest was 16.0% at 12.0 μl/cm2. The mortality percentage of T. castaneum was increased with the increase of doses and time-period in both toxicity and residual effects. It is concluded that leaves extract of S. surrattense could be useful for managing populations of T. castaneum.
Page(s):
107-112
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Entomology, Volume: 25, Issue: 2, Year: 2010