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The ability of blackgrass to multiply means that a single plant could get this bad in a field in just two seasons.
While blackgrass is a growing concern on this island, it has long been a serious issue in Britain and the problems and experiences of dealing with the weed are recalled in this article.
Blackgrass (Alopecurus myosuroides) is the most important herbicide-resistant weed in Europe, occurring in at least 10 countries. In Britain, it occurs on at least 20,000 farms in 35 counties and mainly in autumn-sown crops.
It is a very competitive weed and populations have the potential to increase rapidly, due to its ability to produce high seed numbers. Its aggressive growth pattern means that yield losses can be substantial.
Novel fungicide widens T2 options for wheat growers >More in
The arrival of the new fungicide Univoq gives wheat growers an alternative to established SDHI-azole products used at the T2 flag leaf timing, and will add much-needed resilience to disease control programmes.
Approved in time for flag leaf sprays, Univoq from Corteva Agriscience contains the new active ingredient fenpicoxamid (also known as inatreq), which comes from a chemistry group that has not been used in cereal disease control before.
Classed as a quinone inside inhibitor, fenpicoxamid targets pathogens in a different way to azoles, SDHIs and strobilurins, expanding the options available and bringing the ability to protect other chemistry.