摘要 : Seed ethanolic extracts of 21 Brazilian plants were evaluated for ovicidal, larvicidal, and pupicidal activities against insecticide-susceptible (SS) and field-collected (FC) strains of <i>Aedes aegypti</i> (L.) (Diptera: Culicida... 展开 Seed ethanolic extracts of 21 Brazilian plants were evaluated for ovicidal, larvicidal, and pupicidal activities against insecticide-susceptible (SS) and field-collected (FC) strains of <i>Aedes aegypti</i> (L.) (Diptera: Culicidae), as well as for their effects on nontarget organisms. <i>Myracrodruon urundeuva</i> Fr. Allemao extract was highly toxic to both mosquito strains. <i>Schinopsis brasiliensis</i> Engler extract showed low toxicity and was 38-68 times less toxic to <i>Ae. aegypti</i> larvae than was <i>M. urundeuva</i> extract. The pupicidal activity (LC₅₀) of 14 plant seed extracts ranged between 9 and 433 micro g/ml, and toxicities were comparable to both mosquito strains. <i>Piptadenia moniliformis</i> Benth. and <i>Luetzelburgia auriculata</i> (Allemao) Ducke extracts showed the highest activities against pupae of FC and SS strains. None of the extracts showed 100% ovicidal activity. In addition, the active extracts did not show high acute toxicity to mice (LD₅₀ >1.5 g/kg), except that of <i>Enterolobium contortisiliquum</i> (Vell.) Morong. Most of the active extracts exhibited low toxicity against brine shrimp (<i>Artemia</i> sp.) nauplii. The extracts of <i>M. urundeuva</i>, <i>P. moniliformis</i>, and <i>L. auriculata</i> are promising sources of recognized classes of insecticidal compounds with good selectivity against immature stages of <i>Ae. aegypti</i>. 收起