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      Enhanced ovicidal activity of an oil formulation of the fungus Metarhizium anisopliae on the mosquito Aedes aegypti.

      Medical and Veterinary Entomology

      Aedes, microbiology, Animals, Metarhizium, physiology, Mosquito Control, methods, Ovum, Pest Control, Biological

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          Abstract

          The effect of humidity on the activity of Metarhizium anisopliae IP 46 (Metsch.) Sorokin (Hypocreales: Clavicipitaceae) formulated in sunflower oil against Aedes aegypti (L.) (Diptera: Culicidae) eggs was examined. After exposure of eggs at 75% relative humidity (RH) for 98% RH, eclosion was 98% RH, followed by: (a) a 12-day exposure at 75% RH before submersion in water; (b) a minimal 5-day exposure at > 98% RH and direct subsequent transfer of treated eggs to water, or (c) a minimal daily 20-h exposure at > 98% RH alternating with 4 h at 75% RH for 10 days. We demonstrate that oil-based formulations of conidia of M. anisopliae enhance ovicidal activity at high humidities and conclude that these formulations have potential in the integrated control of Ae. aegypti.

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          Journal
          19309438
          10.1111/j.1365-2915.2008.00792.x

          Chemistry

          Aedes, microbiology, Animals, Metarhizium, physiology, Mosquito Control, methods, Ovum, Pest Control, Biological

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