Possibilities of volunteer (imidazolinone) herbicide tolerant rape regulation in winter wheat stands
2016
Spacilova V
In 2013-2014, a small plot; 12 square m; experiment in winter wheat was established on locations with different climatic and soil conditions. On half of the experimental area IMI volunteer oilseed rape (GSR) was sown, on the other half of the experimental area conventional OSR was sown. Six different herbicides were applied far the experiment. The application was made at two application timings (T1: BBCH 11 - autumn, T2: BBCH 27 - spring). The efficacy of the herbicides against imidazolinone-tolerant (IMI) and conventional volunteer of oilseed rape as well as winter wheat yield and quality were evaluated. IMI volunteer OSR was successfully controlled with herbicide containing combination of PDS inhibitors with oxyacetamides diflufenican + flufenacet) or herbicide combining PDS inhibitors with thazolopyrimedines (diflufenican + florasulam + penoxsulam) - autumn application. Herbicide containing combination of syntetic auxins with triazolopyrimedines (2.4-D + aminopyralid+florsulfam) ensured very good efficacy of spring apllication. If benefits of application timing were detected, there was found, that autumn application led to increase of yield (the yield was approximately increased by 10 %). The autumn application ensured early OSR volunteer suppresion and it was positively reflected in yield.
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