Sunday 27 May 2012
Headlines
Did you find this story interesting? (0) (0)
26/09/2005
TAG trials show early treatment boosts black-grass control
Spraying black-grass while still at its 1 leaf stage – compared with even just waiting until it has 2-3 leaves – can substantially boost control, independent trial plots by The Arable Group (TAG) have confirmed.
Across three separate winter wheat trials in Suffolk, Bedfordshire and Lincolnshire, applying a first post-emergence herbicide mix of Hawk with flupyrsulfuron to 1 leaf black-grass repeatedly gave better control than when the same treatment was applied at 2-3 leaves. An identical pre-emergence herbicide had been used beforehand in each case
Indeed at the worst infested site, Ixworth in Suffolk, where untreated black-grass populations reached some 939 heads per square metre, while the 2-3 leaf application reduced head counts to 315 per square metre, the same mix applied less than a month earlier at 1 leaf reduced this to just 77.
This was despite herbicide resistance having previously been confirmed at the site. A similar pattern of better control from earlier application was seen in the other trials.
According to Andrew Creasy, TAG trial manager for the Ixworth site, improved control from the earlier of the two sprays is down to black-grass plants being at their most vulnerable stage. “You are getting them at that very best timing,” he adds.
Of all the post-emergence treatments, top control at two out of three sites came when Hawk with isoproturon was applied to black-grass at 1 leaf as a holding spray, and then followed up later with mesosulfuron plus iodosulfuron once the weed reached 2-3 leaves.
By applying this early Hawk holding spray it makes black-grass more manageable going through winter, Mr Creasy suggests.
“Programmes are the best way to control difficult black-grass and Hawk fits into that,” he adds. “I think that the trial did show that a holding spray would work.”
Across three separate winter wheat trials in Suffolk, Bedfordshire and Lincolnshire, applying a first post-emergence herbicide mix of Hawk with flupyrsulfuron to 1 leaf black-grass repeatedly gave better control than when the same treatment was applied at 2-3 leaves. An identical pre-emergence herbicide had been used beforehand in each case
Indeed at the worst infested site, Ixworth in Suffolk, where untreated black-grass populations reached some 939 heads per square metre, while the 2-3 leaf application reduced head counts to 315 per square metre, the same mix applied less than a month earlier at 1 leaf reduced this to just 77.
This was despite herbicide resistance having previously been confirmed at the site. A similar pattern of better control from earlier application was seen in the other trials.
According to Andrew Creasy, TAG trial manager for the Ixworth site, improved control from the earlier of the two sprays is down to black-grass plants being at their most vulnerable stage. “You are getting them at that very best timing,” he adds.
Of all the post-emergence treatments, top control at two out of three sites came when Hawk with isoproturon was applied to black-grass at 1 leaf as a holding spray, and then followed up later with mesosulfuron plus iodosulfuron once the weed reached 2-3 leaves.
By applying this early Hawk holding spray it makes black-grass more manageable going through winter, Mr Creasy suggests.
“Programmes are the best way to control difficult black-grass and Hawk fits into that,” he adds. “I think that the trial did show that a holding spray would work.”
No Comments
Nobody has posted any comments on this story.
|
Farming items for Sale
|
New Holland TS100 - York
(Price on Application)
(Price on Application)
John Deere - 7530 - Byfield
(Price on Application)
(Price on Application)
New Holland TD95 D - Chulmleigh(GBP 14400)
John Deere 6430 - Ormskirk(GBP 45750)
Valmet 6400 - Dalbeattie(GBP 9540)
Related News
Specialists nozzles boosts black-grass control - 24 Aug 2010Using specialist spray nozzles to treat black-grass can boost pre-emergence control up to 10% – even when using a robust herbicide treatment to begin ...
Robust black-grass control still required - though scope to improve cost-effectiveness - 13 Sep 2005DON'T skimp on black-grass control this autumn - even with the cushion of single farm payments - wheat growers are being advised. Left untreate...
Black-grass control – don’t get caught out in the cold - 17 Jan 2008WINTER wheat growers concerned about how to tackle dormant black-grass once it starts emerging may need to develop alternative strategies if they are ...
Growers urged to capitalise on moist conditions to maximise pre-emergence black-grass control - 12 Oct 2009BE sure to make use of a return to moist conditions to catch up with pre-emergence black-grass management, winter wheat and winter barley growers are ...
Avadex Granules - a key component in an integrated black-grass control programme - 16 Aug 2011With a recorded level of UK farms with herbicide resistant black-grass populations and a continuing decline in the performance of certain chemistry; f...
Kerb Flo is considered to be the “default” herbicide for black-grass control in rape - 17 Oct 2011A series of farmer and agronomist Focus groups have concluded that Kerb Flo (propyzamide) is considered to be the "default" herbicide for gr...
Black-grass is still very difficult to control - 17 Oct 2011Black-grass is still considered to be very difficult to control by over two-thirds of farmers according to a recent survey. Interviewing 97 top farmer...
Golden chance for black-grass control in maize - 16 Mar 2012Eastern counties arable farmers growing maize crops for AD power plants or livestock feed have the opportunity to target black-grass weeds with an alt...
Beak blunting trial shows early promise - 22 Oct 2003As part of the Government’s response to a future ban on beak trimming Defra are currently funding trial work to discover whether a ‘beak blunting’ pro...
Beak trial shows early promise - 21 Feb 2006Early indications from an industry-led study into infra-red beak treatment suggest there are no adverse welfare problems associated with the technique...
