The synergistic mortality and improved fungal performance observed here support the hypothesis that combinations of low insecticide doses and entomopathogenic fungi can enhance integrated pest management programs and reduce the environmental impact of insecticides. Antagonism shows that some particular combinations and application sequences may produce disadvantages in pest control. © 2018 Society of Chemical Industry.

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Se documenta la presencia del thrips, Androthrips ramachandrai Karny y del antocórido Montandoniola confusa Streito & Matocq, depredadores del thrips fitófago Gynaikothrips uzeli Zimmerman en agallas de Ficus benjamina comúnmente llamado “Benjamina” en San Blas, Santiago Ixcuintla y Tepic, Nayarit, México. Se evaluó la actividad biológica de Beauveria bassiana (aislados Bb-S1, Bb-S2 y Bb-S3), Metarhizium anisopliae (Ma-A y Ma-C), y Paecilomyces fumosoroseus (Pf-4a) como agentes de control biológico de Gynaikothrips uzeli en condiciones de laboratorio. Los aislados Bb-S1 y Ma-A causaron las mayores mortalidades en larvas (40.05±5.08, 64.8±3.01) y adultos (54.3±7.8, 60.5±6.4) respectivamente.

The maize weevil (Sitophilus zeamais Motschulsky) and the red flour beetle (Tribolium castaneum Herbst) are two key pests of stored-grain products worldwide. The insecticidal activity of boldo (Peumus boldus Molina) powder, liquid ethanolic and hexanic extracts against S. zeamais and T. castaneum were evaluated under laboratory conditions. The evaluated variables were mortality, emergence of adult insects (F 1 ), and grain weight loss. The experimental design was completely randomized. The mortality in S. zeamais was 100% even at the lowest powder concentration (0.5% w/w), whereas emergence of F 1 adult insects was 0% and grain weight loss was ≤ 0.08%. For T. castaneum, only 8 and 16% w/w powder concentrations reached 100% mortality. The liquid ethanolic and hexanic extracts caused 100% mortality of S. zeamais, whereas only the ethanolic extract reached this value for T. castaneum. Therefore, the powder and the evaluated extracts of P. boldus were toxic for S. zeamais and T. castaneum and are promising against these and other stored-grain pests.

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Se expande la distribución del ácaro de la erinosis Aceria annonae. Esta es la primera que se reporta la presencia de los erineos en el estado de Nayarit, causando protuberancias redondeadas sobre el haz de las hojas. Durante 2016 se colectaron hojas de árboles, obtenidas de cuatro localidades en tres municipios del estado de Nayarit, siendo presentes en todas las muestras revisadas. Se discute su biología, comportamiento poblacional y su presencia en el país.