Revystar Experience

T C · Jul 22, 2021

We have used Revystar on Spring Barley at "paint brush" for ramularia and it is disappointing.
We used Adexar type (old stock) as a T2 on wheat and I thought we had too much septoria. My independent agronomist brought some plants from a neighbour who had used Revystar (same variety) and it was dirtier than mine.
Not impressed with the first season without chlorothalanil, could really have done with a couple of seasons trying new chemistry vs old.

PSQ · Jul 22, 2021

From another thread:

PSQ said:
Revystar isn't all it's cracked up to be. The last 2 low disease years have lulled us in to thinking it's the answer to life after CTL, but it's been found to be seriously wanting this year...

Edit: if Revystar isn't the answer to a serious septoria threat without CTL, then we can kiss two thirds of the 'Recommended List' goodbye, and with such a concentration of wheat varieties across the UK we can kiss the existing genetic disease resistance goodbye shortly afterwards.

Are we at the point of realising that losing CTL will have a massive 'unintended consequence' on our ability to produce wheat profitably, and supply domestic demand?

T C · Jul 22, 2021

PSQ said:
From another thread:

Missed that - great minds tho!
Seems that my experience in Spring Barley may not be unusual.

Jim75 · Jul 22, 2021

T C said:
We have used Revystar on Spring Barley at "paint brush" for ramularia and it is disappointing.
We used Adexar type (old stock) as a T2 on wheat and I thought we had too much septoria. My independent agronomist brought some plants from a neighbour who had used Revystar (same variety) and it was dirtier than mine.
Not impressed with the first season without chlorothalanil, could really have done with a couple of seasons trying new chemistry vs old.

Any untreated areas for comparison?

T C · Jul 22, 2021

Jim75 said:
Any untreated areas for comparison?

No, just a feeling that it may not be all it was promised to be.

Hjwise · Jul 22, 2021

T C said:
We have used Revystar on Spring Barley at "paint brush" for ramularia and it is disappointing.
We used Adexar type (old stock) as a T2 on wheat and I thought we had too much septoria. My independent agronomist brought some plants from a neighbour who had used Revystar (same variety) and it was dirtier than mine.
Not impressed with the first season without chlorothalanil, could really have done with a couple of seasons trying new chemistry vs old.

I’m very disappointed with it. Again, nothing scientific to back it up but won’t be using next year. What rate did you use?

PSQ · Jul 22, 2021

T C said:
No, just a feeling that it may not be all it was promised to be.

I’m sure you read it too, but the report in last weeks FW mentioned that it wasn’t just a Septoria issue as there typically isn’t a lot of pycnidia black spots, but that michrodochium nivale was infecting leaf tissue too. It might just be a ‘one off’ year, or it might not…

Jim75 · Jul 22, 2021

T C said:
No, just a feeling that it may not be all it was promised to be.

mild Symptoms here on well timed application, but by all accounts untreated plots are rife with it so maybe not as bad as first feared.

Andy26 · Jul 22, 2021

Dissapointing performance here as a T2 on Skyfall, both Septoria and yellow rust seemed hardly touched by it.
The dose response curves bore little resemblance to how it performed in the field.

I did wonder if there was something wrong with the batch, it was that bad.

beltbreaker · Jul 22, 2021

I am happy with Revystar in comparison to the untreated plots. Only one fungicide this year and my barley is cleaner than the AHDB Rolls Royce treated plots
I also sent some away for DNA analysis which came back low pressure although I did it too late as they struggled for sap.
Septoria on the other hand I am seeing a lot more than normal but this year but this is the brave new world we are in. New fungicides next year look interesting but how long can we keep on this treadmill

Sandy · Jul 22, 2021

Revystar is a very expensive can of pee waste of time on spring barley where the Folpet which most people said was the same are wrong crops are green as grass with Folpet no disease

ajd132 · Jul 23, 2021

The era of chemical agriculture and answers in cans is ending. Seems to have worked okay here but for how long?
The treadmill of our own making is going to fast now and agronomy needs to head down different paths.

Nzed · Jul 23, 2021

T C said:
We have used Revystar on Spring Barley at "paint brush" for ramularia and it is disappointing.
We used Adexar type (old stock) as a T2 on wheat and I thought we had too much septoria. My independent agronomist brought some plants from a neighbour who had used Revystar (same variety) and it was dirtier than mine.
Not impressed with the first season without chlorothalanil, could really have done with a couple of seasons trying new chemistry vs old.

It stinks as well which is annoying for public perception

shakerator · Jul 23, 2021

ajd132 said:
The era of chemical agriculture and answers in cans is ending. Seems to have worked okay here but for how long?
The treadmill of our own making is going to fast now and agronomy needs to head down different paths.

why do you think it’s ending ? In my view it’s just changing away from post patent products / imported produce from less regulated origins ....it doesn’t look as though our government is interested in the Swiss model of subsiding food quality ?

Against_the_grain · Jul 23, 2021

ajd132 said:
The era of chemical agriculture and answers in cans is ending.

No chance. The big Ag chem companies will make sure of it. What they will do though is breed certain chemically resistant traits into varieties and then sell you the answer in a can, in a similar vain to clearfield OSR. Seed traits combined with chemical tolerance have been and will be the hot topic for the next generation.

ajd132 · Jul 23, 2021

shakerator said:
why do you think it’s ending ? In my view it’s just changing away from post patent products / imported produce from less regulated origins ....it doesn’t look as though our government is interested in the Swiss model of subsiding food quality ?

I’m just talking about the way I think the science should go. Relying so much on chemicals which stop working very quickly appears to breaking. I don’t think anything needs subsidising not sure what any of that’s got to do with anything.

ajd132 · Jul 23, 2021

Against_the_grain said:
No chance. The big Ag chem companies will make sure of it. What they will do though is breed certain chemically resistant traits into varieties and then sell you the answer in a can, in a similar vain to clearfield OSR. Seed traits combined with chemical tolerance have been and will be the hot topic for the next generation.

Agree this is probably what will happen and we will remain in thrall to stuff which breaks. Unfortunately there’s no money in deploying science to find methods that aren’t so breakable. Hence the merry go round continues!

shakerator · Jul 23, 2021

ajd132 said:
I’m just talking about the way I think the science should go. Relying so much on chemicals which stop working very quickly appears to breaking. I don’t think anything needs subsidising not sure what any of that’s got to do with anything.

I dislike relying on silver bullets as much as anyone - but the are they cheaper than addressing the root causes of many problems ?

teslacoils · Jul 23, 2021

I know a lot of folk cut back on t0 and T1 - might that be why it was less effective? Or just the shocking weather post T3?

SilliamWhale · Jul 23, 2021

This year a cut of T1 would have put you on the back foot.

I did a litre of aviator at T1 and 8 years out of 10 it would have been fine. This year on reflection it should have been higher.

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