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The acaricidal activities of root extracts from the of Tateges erecta against T. viennensis were determined under illumination and non-illumination conditions. Furthermore, the effects of chloroform extract on several enzymes activities of T. viennensis were also evaluated. According to the F-test statistical analysis, the chloroform extract had acaricidal activities against T. viennensis under non-illumination condition, but petroleum ether, and methanol extracts had no significant acaricidal activities. Furthermore, the extracts of T. erecta had photo-activated insecticidal activity, and the mean lethal concentrations (LC50) of chloroform, petroleum ether, and methanol extracts were respectively 5.8mg/mL, 3.5 mg/mL and 8.4mg/mL under illumination condition. The enzymatic activity assay suggested that the protease activities in T. viennensis were obviously inhibited by the extracts, while the activity of glutathione-s-transferase was activated under non-illumination condition, but significantly inhibited under illumination condition. The activities of esterase isozymes in T. viennensis were not significantly influenced under non-illumination condition, but were significantly inhibited under illumination condition.
Date of Conference: 18-20 June 2010