The effectiveness of herbicides and herbicide-urea mixtures in the cultivation of winter triticale

Brzozowska, I.; Brzozowski, J.; Giermak, I.

Annales Universitatis Mariae Curie-Sklodowska. Sectio E, Agricultura 59(3): 1259-1266

2004


ISSN/ISBN: 0365-1118
Accession: 004351385

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Abstract
A field experiment involving cultivation of winter triticale cv. Bogo on medium proper brown soil classified as a very good rye complex was carried out in 2001-03 in Poland to determine the efficacy of several herbicides and herbicide and urea combinations. The type of herbicide or its combination with urea was the first experimental factor: Granstar 75 WG (tribenuron-methyl); Granstar 75 WG (tribenuron-methyl)+Starane 250 EC (fluroxypyr); Granstar 75 WG (tribenuron-methyl)+Chwastox Extra 300 SL (MCPA); Chwastox Extra 300 SL (MCPA); Chwastox Extra 300 SL (MCPA)+Starane 250 EC (fluroxypyr); Aminopielik D 450 SL (2,4-D+dicamba); and Mustang 306 SE (florasulam+2,4-D). Urea application was the second factor (in total 95.0 kg N ha-1): in the soil (only granulated in the three following terms: 34.0 kg N ha-1 at the beginning of vegetation, 27.6 kg N ha-1 at the end of reproduction phase, and 33.4 kg N ha-1 at the end of culm formation); to soil and foliar application (twice to the soil: 34.0 kg N ha-1 at the beginning of vegetation and 16.8 kg N ha-1 at the end of culm formation, and twice to leaves: 27.6 kg N ha-1 at the end of reproduction as 20% urea solution with herbicides and 16.6 kg N ha-1 at the end of culm formation phase as 12% urea solution). Herbicide efficiency was evaluated after 4 and 8 weeks after the treatment based on the loss of dry matter in the aboveground parts in comparison to the control combinations. Eight weeks after the application of herbicide and herbicide in combination with urea, the highest efficiency was reported for Aminopielik D (on average 84.0%), herbicide combination of Granstar 75 WG+Starane 250 EC (83.5%) and Mustang 306 SE (81.7%). Considerably poorer efficiency was obtained after the application of Chwastox Extra 300 SL (66.7%) and the herbicide combination of Granstar 75 WG+Chwastox Extra 300 SL (72.8%). Application of urea solution in combination with herbicides did not have a significant effect on their efficiency.