Novel pesticidal compositions and / or growth of regulatory a surfactant particular non-ionic

This invention relates to novel pesticidal compositions and / or growth regulating compositions for harmful plants and / or insects and / or pests using a surfactant nonionic particular, said compositions are in particular useful in the fields of agriculture and / or public or domestic hygiene through treatment or protection processes; the said surface-active agent as such is also part of the present invention; as well as the so-called methods of treating or protecting implementing it.