Round Up Resistant Blackgrass

[willy]

That is true about the shallow roots especially good control in osr, so make the most of it. But I do also have 500 acres of badly drained variable sh1t

I also forgot to say, how amazed at how people like Stephen moss and other so called professors, who are trying to make a simple thing so complicated. They can't see the wood for the trees, or are they being persuaded by someone else to not come up with a solution to quick.

 

[Andy Howard]

I think everyone is getting a bit tied up in what is a good robust rate of glyphosate. 3-4 L/ha are really for large broad leaved weeds and perennial grasses and BLW's. 1.5-2l/ha has always been considered strong enough for young BLW's and grassweeds. Indeed less than 10 years ago Monsanto produced a product called Sting Eco. This was specifically for producing stale seedbeds. It had 120g/ha glyphosate and rec rate was 3-4 L/ha. The only difference between this and generic roundup was it included a fast uptake wetter to enable cultivation within 6 hrs!!

Is that the same recommendation.they have done in south America? If so then obviously not robust enough to stop huge resistance problems.

 

[Andy Howard]

Because just saying using it once is very rigid and you need to farm with all your faculties and use common sense. I agree with checking herbicide resistance but you could be also increasing pressure by letting weed seeds multiply because you will only use it the once.

Blackgrass is simple to control. Drill early using direct drilling while the soil is warm, get good competitive crop, spray off blackgrass patches in may with round up and have at least 2 spring breaks in 5 years.

I think some farmers would be spraying off a lot of their wheat in May then. I agree with you and that is what we do but a lot of places are beyond patches.

 

[Will Blackburn]

Where in this thread did I say I had bad black grass and no rotation? We don't get more rain than the Midwest! We officially get less than 600mm per year which is classed as a desert! In June any sheep on my lawn would have died! We used to have sheep on our light land farm but couldn't keep them outside on heavy land after Oct due to foot rot.

Oh and by the way the majority of meat consumed in this country is white meat fed on cereals, not red meat fed on grass!!

Below 500mm is arid, and below 250mm is desert AFAIK.

 

[Tractor Boy]

Below 500mm is arid, and below 250mm is desert AFAIK.

Ok. That makes me feel better. In an average year we get about 75mm more than arid! And in a drought year we are going to have to grow cactus! At least I'm not a desert!

 

[Will Blackburn]

Ok. That makes me feel better. In an average year we get about 75mm more than arid! And in a drought year we are going to have to grow cactus! At least I'm not a desert!

The definitions are as rediculous as your response, as potential evapotranspiration is more important than total rainfall, and I would suggest that footrot would be none issue if you were truly arid.

 

[willy]

I think some farmers would be spraying off a lot of their wheat in May then. I agree with you and that is what we do but a lot of places are beyond patches.

Yes these are the fields that need concentrating on, with double spring crop or a good dose of crawler followed by kerb as late as possible.

I have decided to drill most fields with ww and then decide in the spring if hey can be patch sprayed, if not spray off then dd spring wheat in. I can't see any other way of getting rid of the weed

 

[jammygit]

http://sustainablepulse.com/2013/09...ndup-over-deadly-kidney-disease/#.Ume7WPmkr-w

politically resistant blackgrass?

 

[Baling Hay]

The definitions are as rediculous as your response, as potential evapotranspiration is more important than total rainfall, and I would suggest that footrot would be none issue if you were truly arid.

Yeah he said he was a desert but can't graze sheep on the heavy land post October because of the footrot due to wet ground!

 

[shakerator]

I also forgot to say, how amazed at how people like Stephen moss and other so called professors, who are trying to make a simple thing so complicated. They can't see the wood for the trees, or are they being persuaded by someone else to not come up with a solution to quick.[/quote]


£m's to tell us to delay drill, spring crop etc etc

 

[DrWazzock]

I reckon low drift jets have a lot to answer for. Hitting small targets needs a fine spray.

 

[yellow belly]

I reckon low drift jets have a lot to answer for. Hitting small targets needs a fine spray.

rup works best with fine spray low water rates but this drifts and get hedges and neighbours crops

with low drift jets higher rates are needed?

 

[Wheatseeker]

I was listening to Dick Neale speak last night about Black grass strategies and his experiences at Brampton. He was promoting Cousin's new Surface cultivator and using multiple applications of glyphosate along with rolling and raking to get as much BG emerged before the crop is drilled. This year I have been having the discussion with my father that I do not want to use round up more than once in a cropping season as it will lead to resistance. While listening to Dick speak I was ready to ask the question about multiply glyphosate applications and resistance when he put up a slide showing BG that had not been killed by Glyphosate and he said he had put another dose on at a higher rate and it was checking it. Is this the first signs of round up resistance in BG in the UK? Is anyone on here going to admit they have seen anything similar? I think this could be the next big story in the next couple of years. There could be a lot of cheap grazing soon as fields get grassed down!!

Sprayed 07/10/13, ideal conditions 540gm glyphosate/ha, photo taken 2 weeks later. Live next to dead plants. A lot have emerged since it was sprayed but there are plenty of 3 leaf plants alive that were there at the time of spraying. All the advice regarding blackgrass control calls for stale seedbeds followed by glyphosate, but what are we doing to protect Roundup especially in the absence of follow up cultivations?

 

[Baling Hay]

Sprayed 07/10/13, ideal conditions 540gm glyphosate/ha, photo taken 2 weeks later. Live next to dead plants. A lot have emerged since it was sprayed but there are plenty of 3 leaf plants alive that were there at the time of spraying. All the advice regarding blackgrass control calls for stale seedbeds followed by glyphosate, but what are we doing to protect Roundup especially in the absence of follow up cultivations?
View attachment 21318

I won't press like as there is nothing to like about that! Very serious!

What is your rotation?

 

[Wheatseeker]

Was OSR/WW. Now spring wheat/ spring beans / spring ....

 

[Baling Hay]

May be worthwhile putting cover crops in to try and suppress it a bit rather than frequent round up sprays as they look to be doing no good?

 

[rob1]

Sprayed 07/10/13, ideal conditions 540gm glyphosate/ha, photo taken 2 weeks later. Live next to dead plants. A lot have emerged since it was sprayed but there are plenty of 3 leaf plants alive that were there at the time of spraying. All the advice regarding blackgrass control calls for stale seedbeds followed by glyphosate, but what are we doing to protect Roundup especially in the absence of follow up cultivations?
View attachment 21318

think I would let some grow on and take seed from it and have a proper test done, would be a very serious problem if it was resistant

 

[MrNoo]

I had one field very much like that, gave it 1.5ltrs/ha in ideal conditions, and result was the same as your picture shows, went in again with 3ltr/ha and have had a fantastic kill needless to say it`ll be a Spring sown crop going in, hoping to get another flush or two out of it before drilling mind. Result of buggering about when it was in OSR last year, taking it through to harvest when I should have sprayed the lot out and put SB in it`s place.

 

[franklin]

Sprayed 07/10/13, ideal conditions 540gm glyphosate/ha

So what % of those plants would you say were there before spraying? I would be very upset if my agronomist had suggested such a low dose of Roundup. Personally I think 1000g/ai per hectare is the minimum.

think I would let some grow on and take seed from it and have a proper test done, would be a very serious problem if it was resistant

It would be beyond a serious problem. Confirmed roundup resistant BG would be an unmitigated disaster.

 

[Andy26]

Sprayed 07/10/13, ideal conditions 540gm glyphosate/ha, photo taken 2 weeks later. Live next to dead plants. A lot have emerged since it was sprayed but there are plenty of 3 leaf plants alive that were there at the time of spraying. All the advice regarding blackgrass control calls for stale seedbeds followed by glyphosate, but what are we doing to protect Roundup especially in the absence of follow up cultivations?
View attachment 21318

That's
some serious stuff, what are you planning to drill in the spring in that field?