Influence of herbicide use on yield and quality of wheat
2001
Stashinskis, E. (Latvia University of Agriculture, Jelgava (Latvia). Dept. of Soil Management)
Use of herbicides is very important for reducing looses of the yield in wheat production in Latvia. The aim of experiments was to investigate effect of herbicides Lintur, Secator, Ariane, Duplosan Super on yield and quality of spring and winter wheat. Herbicide efficiency was studied on spring wheat variety Dragon and winter wheat variety 'Kontrast'. The yield, structure of yield, weediness and quality indicators - content of gluten, content of proteins and Zeleny index were determined. The results showed significant increasing of yield and grain quality numbers of spring wheat in all variants of herbicide use, except variant with herbicide Lintur. The most important weed species reducing grain quality indicators were: Galium aparine L., Lamium purpureum L., Veronica arvensis L., Convulvulus arvensis L., Matricalia perforata Merat. In the winter wheat trials situation was different. Significant yield increasing was in all variants of herbicide use to compare with untreated. The grain quality indicators were not essentially increased in variants with herbicides Lintur, Ariane and Duplosan Super. Only in the variant with herbicide Secator use was significant increasing of these indicators. The reduction of weediness caused by herbicide use, has bigger increasing of quality indicators of spring wheat than of winter wheat. Reasons for these are different plant development and natural competitiveness of winter wheat
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