Soil temperatures (at 30 cms) are becoming cooler, close to 10°C, in northern and central areas. In eastern areas soil temperatures remain too warm (11°C – 12°C) for effective Kerb® Flo 500 and AstroKerb applications. Broadly with temperatures set to stay mild we would expect to see a lot of applications start in around about a week’s time. .
It is important to wait until soil temperatures have cooled to less than 10°C as this optimises the blackgrass control activity from your propyzamide application. Cooler soil temperatures slows propyzamide breakdown and ensures blackgrass roots are exposed to propyzamide for longer periods of time, thus optimizing control.
With recommendations and applications already being made and with rain forecast for parts of the UK for the weekend it is important to remember that there is an increased risk to water if there is heavy rainfall within 48 hours of application to a dry soil, so caution is recommended.
Use the maps and links below to find the data for soil temperatures and moisture-deficits in your region. Please note at 30 cms soil temperature reading is less variable than the more commonly used 10 cm reading.