Abstract
The study aims to evaluate oxidative stress and the activity of acetylcholinesterase (AChE), upon applying polyphenolic bioinsecticide isolated from Streblus asper (PBSA) at a concentration of 0.595 ?g/insect (LD50) by topical application on Dysdercus cingulatus Fabricius (Red cotton bug- Hemiptera, Pyrrhocoridae). The results demonstrated that the active fraction exhibited significant inhibition in activities of AChE, antioxidant enzymes and Glutathione-S-transferase (GST) and a significant increase in the lipid peroxides (MDA/ TBARS) which led to the fact that D. cingulatus became more susceptible to the tested PBSA. The study has provided basic information on the mechanism of action of PBSA that will be promising to develop effective alternatives to synthetic insecticides.
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