Thrips spp. in greenhouses in the North-West of Russia
Thripses are very important at present. The complex of greenhouses thrips in North-Wester Russia is presented at this work. Critical situation is to invasive species of thripses - western flower thrips Frankliniella occidentalis Perg. and american thrips Echinothrips americanus Morgan. Western flower thrips was found in our country in 1989 and now it's prediominant on vegetables and ornamental crops in greenhouses North-Wester Russia. American thrips was recently discovered in hothouses of Saint-Petersburg, but he populates the great number of plants. Also the problem of invasive thrips is very actual at this moment.