EN
Thysanoptera are an order of insects, which are common in different environments. Among them a group of species growing on cultivated cereal crops and grasses was distinguished. Increasing of the cereals in cropping and soft climate conditions during last years maybe favourable factors for increasing of Thysanoptera abundance. That is why these phytophagous insects can influence the yields more and more. The results of previous research are ambiguous and show that the estimation of crop losses caused by Thysanoptera needs further complex studies.