We represent agricultural enterprise in Russia. We produse vegetables in greenhouse. Two years ago we started to produce bumblebees for polination of tomatoes and strawberries/ We have to buy queens and colonies for production of queens abroad. This year we find features of heteroises in those colonies. We try to produce queens ourselves but because of foreign material we have problems in trird generation. We are interesting of heteroisis of bumblebees.
 Thank you in advance.