Functional Response of Phytoseiulus persimilis (Acari: Phytoseiidae) on Untreated and Beauveria bassiana - Treated Adults of Tetranychus urticae (Acari: Tetranychidae)

Sublethal effect of Abamectin in the functional response of the predator Phytoseiulus persimilis (Athias-Henriot) on Tetranychus urticae (Koch) (Acari: Phytoseiidae, Tetranychidae)

“…Negative values were obtained in the linear parameter (P 1 <0) in this study conforming the functional response type II for all treatments (LC 10 , LC 15 and control) (Equation 1) (Table 1). Similar results were obtained by Seiedy et al (2012), with the same predator and prey on cucumber leaf discs. The depredation of P. persimilis tended to decrease with the density of the prey, possibly owning to an increase in a satiety of the predator in the most dense areas.…”

Respuesta funcional de Phytoseiulus persimilis sobre Oligonychus punicae (Acari: Phytoseiidae, Tetranychidae) en hojas de aguacate

“…1). La respuesta funcional obtenida (Tipo II) concuerda con los registrados por Skirvin & Fenlon (2003), Xiao & Fadamiro (2010) y Seiedy et al (2012), quienes mencionan que P. persimilis se ha uti-lizado como agente de control biológico mostrando una respuesta funcional de Tipo II. Parvin et al (2010) registraron una tasa de consumo de 42.13, 39.6 y 36.9, para huevos, inmaduros y adultos de T. urticae por día respectivamente, a una densidad de 64 individuos por hoja de frijol con preferencia por el estado de huevo, mientras que Naher et al (2005) señalan un consumo diario de 27.54, 18.12 y 11.32 para los mismos estados de desarrollo respectivamente.…”

Evaluate the Feeding Preference of Some Predator Mites Towards Red Spider Mites Untreated and Treated With Beauveria bassiana

“…An insect or mite may gain selective advantage if it is able to detect entomopathogenic fungi from a distance and respond via behavioural avoidance or through post-contact responses such as grooming (Chouvenc et al, 2008 ;Seiedy et al 2012b). Gao et al,(2012), evaluated the insecticidal activity of strain B. bassiana (RSB) which was highly virulent to the western flower thrips Frankliniella occidentails and was not insecticidal against the predator Orius sauteri, and found that the larva of F. occidentails contaminated by B. bassiana may be poor quality prey for O. sauteri because infection makes the larvae deficient in certain essential nutrients, (Simelane et al, 2008) or creates a build up of fungal toxins or metabolites, which may slow development and shorten adult longevity of O. sauteri.…”