Four new species of Encarsia Förster (Hymenoptera: Aphelinidae) from Mexico are described--E. albata Myartseva sp. n. (State of Nuevo León), E. barracas Myartseva sp. n. (State of Baja California Sur), E. chichenitza Myartseva sp. n. (State of Yucatán) and E. elenae Myartseva sp. n. (State of Tamaulipas). A key to the species of Encarsia in Mexico published in 2012 is modified to include the ne...

the effect of imidacloprid on the greenhouse whitefly and parasitoid wasp studied in greenhouse conditions, on lantana camara l., in a completely randomized block design with five treatments of 0.02, 0.04, 0.08, and 0.16 g/liter of insecticide and control (water) for two periods of short and long term (seven and 125 days after treatment). in short term the difference of mean of the adults’ mort...

Feeding rates of the gynogenetic Amazon molly Poecilia formosa and one of its sexual hosts, the sailfin molly Poecilia latipinna, were measured under winter and summer temperature conditions. Food consumption of the unisexual P. formosa in winter conditions was significantly higher than that of P. latipinna, and it is hypothesized that the resulting food stress might have an important influence...

In a microchromosome-carrying laboratory stock of the normally all-female Amazon molly Poecilia formosa triploid individuals were obtained, all of which spontaneously developed into males. A comparison of morphology of the external and internal insemination apparatus and the gonads, sperm ploidy and behaviour, to laboratory-bred F(1) hybrids revealed that the triploid P. formosa males, though p...

Department of Automation Engineering, National Formosa University Huwei, Yunlin, Taiwan, (Email: [email protected]) *Department of Electrical Engineering, National Winlin University of Science and Technology Douliou, Yunlin, Taiwan **Institute of Electro-Optical and Material Science, National Formosa University Huwei,Yunlin, Taiwan ***Institute of Mechanical Engineering, National Cheng Kung Uni...