16. Insecticidal action of Silwet l-77 towards some aphid species

The insecticidal action of Silwet L-77, a common organosilicone surfactant and wetting agent for plant protection products, on the base of trisiloxane ethoxylate, was observed at concentrations 0.011 – 0.012% (v/v), towards three aphid species: Aphis nerii Boyer de Fonscolombe, Macrosiphum rosae (L.) and Aphis pomi (de Geer). Our results indicate that Silwet L-77 has good potential for controlling tested aphid species alone, in spite of being a typical agricultural adjuvant used for lowering of the surface tension, respectively to improving wetting abilities of the pesticide spraying solutions.