Larvicidal, Ovicidal, Synergistic, and Repellent Activities of and Its Dominant Constituents Against .

In the current study, to combat insecticide resistance, we explored larvicidal, ovicidal, synergistic, and repellent activities of extract and its dominant constituents against . The results of the toxicity bioassays demonstrated that the extract of exerted significant larvicidal activity (16.66-86.66%) against the third-instar larvae of at different concentrations (5-50 ug/mL) and low hatchability of eggs (2.32-75%) at 5-50 ug/mL. The constituents of showed a synergistic effect when applied as a mixture (LC + LC) against larvae, while no synergistic effect was observed against the eggs of . extract provided 93.11% repellency in the first 90 min and gradually decreased to 53.14% after 240 min, while the positive control DEET (N,N-diethyl-3-methylbenzamide) showed 94.18% in the first 90 min and 55.33% after 240 min. All of the results exhibited a concentration-dependent effect. To the best of our knowledge, this is the first time that a study has identified a highly effective extract of , which could be used as an alternative agent to control larvae and eggs and to repel adults of .