Winter cereal growers should not ignore broad-leaved weeds after reports of populations breaking through early applications of residual chemistry.
Two common scenarios have been identified by Dow AgroSciences’ field teams, according to the company’s cereals herbicide specialist Stuart Jackson.
“Generally speaking the first application of flufenacet-based residual herbicides targeting autumn germinating grass weeds have been applied in a timely way to winter cereals, often within 24 hours of drilling,” Mr Jackson said.
Winter cereals growers should not ignore broad-leaved weeds after reports of populations breaking through early applications of residual chemistry.
On the ground, Dow’s regional teams are reporting populations of cranesbill, poppy and fool’s parsley emerging, along with volunteer oilseed rape and beans.
Where conditions allow, there is still an opportunity for growers to tackle any issues they have this year, rather than waiting until spring.
October in photos from our team in the field:
This gives timing advice for application to oilseed rape.
Although some Kerb® Flo 500 and ASTROKerb® recommendations are being made, soil temperatures (at 30 cms) in the oilseed rape growing areas are around 11°C – 14°C, too warm for outstanding results for blackgrass control. In many places soils are also wet which will prohibit travelling anyway.
Welcome to the first edition for this autumn giving timing advice for application to oilseed rape.
Soil temperatures (at 30 cms) in the oilseed rape growing areas are around 11°C – 14°C, too warm for outstanding results to be achieved with Kerb® Flo 500 for blackgrass control. In northern England and Scotland soils are also very wet which would prohibit travelling anyway.
Please note a 30 cm soil temperature reading is less variable than the more commonly used 10 cm reading.
For optimal blackgrass control Dow AgroSciences recommend Kerb Flo 500 and ASTROKerb® applications are made when soil temperatures have got down to 10°C and falling, and there is sufficient soil moisture in the soil for grassweed uptake. Both these criteria are rarely met before November.