EFFECT OF FOLIAR ANTIBROADLEAF HERBICIDES ON FAT CONTENT IN SEEDS OF VARIOUS COTTON (Gossypium hirsutum L.) CULTIVARS

In this study was investigate the effect of vegetative treatment with the herbicides Basagran 480 SL, Pulsar 40 and Express 50 WG on the fat content of seeds of different Bulgarian cotton cultivars. The experiment was carried out with twelve Bulgarian cotton cultivars (Gossypium hirsutum L.) - Chirpan-539, Helius, Trakia, Vicky, Philipopolis, IPK-Veno, Boyana, Avangard, Natalia, Darmy, Dorina and Nelina. The herbicides were applied at the bud formation stage of cotton. Fat content in cotton seeds was determined by extraction - SR ISO 6492 method. For the first time in the world it has been established that in the vegetative treatment with herbicides the most valuable with regard to cotton seed fat content are all cultivars treated with Basagran 480 SL, except Chirpan-539 and Helius. It has been established that the treatment with the Express 50 WG herbicide less affected the cultivars Chirpan-539, Helius, Trakia, Vicky, Philipopolis, IPK-Veno, Boyana, Avangard, Natalia but all cultivars were negative influenced by the treatment with the herbicide Pulsar 40 with regard to fat content in seeds.