These results indicate that chlorantraniliprole has toxicity against S. cosmioides larvae. Sublethal effects on the biological and reproductive performance of this species can help optimize integrated pest management programs. © 2018 Society of Chemical Industry.

No abstract

Botanical monoterpenes are secondary metabolites present in essential oils produced by plants. Some of them are insect repellents. The bloodsucking bug Rhodnius prolixus Ståhl (Hemiptera: Reduviidae) is one of the main vectors of Chagas disease in the north of South America and some countries in Central America. In this study, we studied the repellence produced by two monoterpenes, menthyl acetate and geraniol, on fifth instar nymphs of R. prolixus . In the absence of other stimuli, both menthyl acetate and geraniol produced a repellent effect from 740 μg/cm 2 and 74 μg/cm 2 , respectively. Pre-exposure to each monoterpene reduced the repellent activity produced by the same substance. Additionally, pre-exposure to one monoterpene decreased the behavioral response of the nymphs to the other one. The repellent effect of both monoterpenes also decreased when nymphs’ antennae were previously treated with the nitric oxide donor S-nitroso-N-acetyl-cysteine.

Este trabajo reporta por primera vez la presencia de Spodoptera eridania (Stoll) en el centro de la Provincia de Santa Fe. Larvas del género Spodoptera fueron recolectadas en un lote de soja Bt y trasladadas a la cámara de cría (FCA-UNL), donde se obtuvo la primera generación. Mediante claves taxonómicas se corroboró que la especie recolectada era S. eridania, plaga de origen tropical presente en el noroeste de Argentina, de hábito polífago que ocasiona daños al alimentarse de hojas y frutos en formación en varios cultivos de importancia económica. Además esta especie es tolerante a la proteína Bt y resistente a insecticidas de uso convencional. Al alimentar las larvas con hojas de soja Bt, completaron su ciclo biológico de manera exitosa. No existe información acerca del comportamiento de esta especie en el centro de la provincia de Santa Fe.