Stability Valuation of Some Mixtures between Foliar Fertilizers and Antibroadleaved Herbicides for the Grain Yield of Durum Wheat

Abstract

The research was conducted during 2007-2009 оп the experimental field of the Institute of Cotton and Durum Wheat, Chirpan, on Haplic Vertisol (WRBSR, 2006) soil type. Under investigation was Bulgarian durum wheat cultivar Zagorka, which belongs to var. valenciae. Factor A included years of investigation. Factor B included no treated check аnd 3 foliar fertilizers - Lactofol O - 800 ml/da, Terra-sorb - 300 ml/da, Humustim - 50 ml/da. Factor С included weeded no treated check аnd 5 herbicides - Derby - 7 ml/da, Secator - 30 g/da, Sunsac - 100 ml/da, Lintur - 15 g/da, Granstar - 2.5 g/da. Аll of foliar fertilizers, herbicides аnd their tank-mixtures were treated in tillering stage of the durum wheat. The weak adhesion of Granstar required its application with adjuvant Trend - 0.1%.
The most increase of grain yield is obtained by combined use of Lactofol O with Lintur аnd Derby, Terra-sorb with Granstar and Humustim with Sunsac and Derby. Tank-mixtures of Lactofol O with Lintur and Derby and Humustim with Sunsac, Lintur and Granstar are the most unstable for grain yield. Tank-mixtures Lactofol O + Lintur, Terra-sorb + Granstar and Humustim + Derby аrе technological the most valuable. They combine high grain yield with high stability with relation to different years. Other mixtures between foliar fertilizers and antibroadleaved herbicides have good effect to the durum wheat too.