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Added reasons to not rush into winter cereal drilling this year
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<blockquote data-quote="Agriland RSS" data-source="post: 7763787" data-attributes="member: 105608"><p>Written by William Kellett from Agriland</p><p></p><p>It may be tempting to drill winter cereals promptly as soon as conditions allow, but there are multiple reasons not to drill too early this season if you have grass weeds, says Paul Gruber, regional technical manager for agronomy firm, ProCam.</p><p></p><h2>High black-grass seed dormancy</h2><p></p><p>High dormancy in blackgrass seed shed this summer, following the wet, overcast June, means blackgrass is set to germinate later than average this autumn, said Gruber.</p><p></p><p>So by delaying drilling as much as is practical, he said it allows more time for this blackgrass to emerge and be controlled before the crop is planted, leaving less of a weed burden to deal with in the crop itself.</p><p></p><p>Gruber said:</p><p></p><p></p><p></p><p>“Do not be lulled into thinking that if we have moist soils then blackgrass seeds shed this year will germinate any earlier. Dormant seeds will still only germinate when they are ready.”</p><p></p><h2>Natural weed seed reductions</h2><p></p><p>“Especially if it is dry, leaving shed weed seeds on the soil surface as long as possible before attempting any type of cultivation or seedbed preparation allows nature to play a hand in helping to reduce weed numbers,” said Gruber, as weed seeds are eaten by predators and degraded by UV light.</p><p></p><h2>Cooler and moist soils</h2><p></p><p>Delaying drilling not only helps reduce the size of the weed burden germinating in the crop, it will also improve results from herbicides, he added.</p><p></p><p></p><p></p><p>“Maintaining residual herbicide performance as long as possible is particularly important in seasons of high blackgrass seed dormancy, so that you can catch later germinators.</p><p></p><p>“There may also be advantages in applying soil-acting herbicides in sequences rather than in a single tank-mix in some fields this season, to further extend the period of residual activity.”</p><p></p><h2>To maintain progress</h2><p></p><p>Growers have made big inroads into reducing blackgrass seedbanks over recent years, said Gruber, but progress can be lost in a single year by drilling too early, and in particular by not allowing time for enough blackgrass to emerge in stale seedbeds before killing it off.</p><p></p><p>“Do not consider a stale seedbed has done its job until it has produced at least one good flush of blackgrass. Even after a good rain has wetted the soil profile, this can still take a couple of weeks.”</p><p></p><h2>To tackle other weeds</h2><p></p><p>Delaying drilling is known to reduce blackgrass pressures. But it will also help against other grass weed problems that are on the rise, said Gruber, notably ryegrass and against certain species of brome.</p><p></p><p></p><p></p><p>“Even if your only grass weed is annual meadow-grass, if you drill too early, this too can become more problematic.”</p><p></p><p>The post <a href="https://www.agriland.co.uk/farming-news/added-reasons-to-not-rush-into-winter-cereal-drilling-this-year/" target="_blank">Added reasons to not rush into winter cereal drilling this year</a> appeared first on <a href="https://www.agriland.co.uk" target="_blank">Agriland.co.uk</a>.</p><p></p><p><a href="https://www.agriland.co.uk/farming-news/added-reasons-to-not-rush-into-winter-cereal-drilling-this-year/" target="_blank">Continue reading on the Agriland Website...</a></p></blockquote><p></p>
[QUOTE="Agriland RSS, post: 7763787, member: 105608"] Written by William Kellett from Agriland It may be tempting to drill winter cereals promptly as soon as conditions allow, but there are multiple reasons not to drill too early this season if you have grass weeds, says Paul Gruber, regional technical manager for agronomy firm, ProCam. [HEADING=1]High black-grass seed dormancy[/HEADING] High dormancy in blackgrass seed shed this summer, following the wet, overcast June, means blackgrass is set to germinate later than average this autumn, said Gruber. So by delaying drilling as much as is practical, he said it allows more time for this blackgrass to emerge and be controlled before the crop is planted, leaving less of a weed burden to deal with in the crop itself. Gruber said: “Do not be lulled into thinking that if we have moist soils then blackgrass seeds shed this year will germinate any earlier. Dormant seeds will still only germinate when they are ready.” [HEADING=1]Natural weed seed reductions[/HEADING] “Especially if it is dry, leaving shed weed seeds on the soil surface as long as possible before attempting any type of cultivation or seedbed preparation allows nature to play a hand in helping to reduce weed numbers,” said Gruber, as weed seeds are eaten by predators and degraded by UV light. [HEADING=1]Cooler and moist soils[/HEADING] Delaying drilling not only helps reduce the size of the weed burden germinating in the crop, it will also improve results from herbicides, he added. “Maintaining residual herbicide performance as long as possible is particularly important in seasons of high blackgrass seed dormancy, so that you can catch later germinators. “There may also be advantages in applying soil-acting herbicides in sequences rather than in a single tank-mix in some fields this season, to further extend the period of residual activity.” [HEADING=1]To maintain progress[/HEADING] Growers have made big inroads into reducing blackgrass seedbanks over recent years, said Gruber, but progress can be lost in a single year by drilling too early, and in particular by not allowing time for enough blackgrass to emerge in stale seedbeds before killing it off. “Do not consider a stale seedbed has done its job until it has produced at least one good flush of blackgrass. Even after a good rain has wetted the soil profile, this can still take a couple of weeks.” [HEADING=1]To tackle other weeds[/HEADING] Delaying drilling is known to reduce blackgrass pressures. But it will also help against other grass weed problems that are on the rise, said Gruber, notably ryegrass and against certain species of brome. “Even if your only grass weed is annual meadow-grass, if you drill too early, this too can become more problematic.” The post [URL='https://www.agriland.co.uk/farming-news/added-reasons-to-not-rush-into-winter-cereal-drilling-this-year/']Added reasons to not rush into winter cereal drilling this year[/URL] appeared first on [URL='https://www.agriland.co.uk']Agriland.co.uk[/URL]. [url="https://www.agriland.co.uk/farming-news/added-reasons-to-not-rush-into-winter-cereal-drilling-this-year/"]Continue reading on the Agriland Website...[/url] [/QUOTE]
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