Whats wrong with this spring Barley?

Little squeak · Jun 5, 2022

Some of the leaves are showing this yellowing, 1st noticed it when I was spraying it with Jaunt on 28th May, it has got slightly worse since then. If it doesn't get any worse from now on it won't affect the yield much but does any one know what has caused it?

CORK · Jun 5, 2022

Jon 3085 · Jun 5, 2022

Manganese

redsloe · Jun 5, 2022

A lot of it about. Not manganese imo.

jd2013 · Jun 5, 2022

Spring barley been very stressy all season here. Have chucked the kitchen sink at a few fields to get them to green up. Think the continued low temperatures have been the cause.

Hindsight · Jun 5, 2022

Little squeak said:
Some of the leaves are showing this yellowing, 1st noticed it when I was spraying it with Jaunt on 28th May, it has got slightly worse since then. If it doesn't get any worse from now on it won't affect the yield much but does any one know what has caused it?
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BYDV - irrelevant.

Jon 3085 · Jun 5, 2022

Mine was like that,sprayed some manganese and liquid k and it seems ok now apart from a few yellow leaves.

spin cycle · Jun 5, 2022

bitta net blotch isn't it :scratchhead:

DrWazzock · Jun 5, 2022

BYDV. I refused to spray insecticide for it, against advice. I’d rather have a but of BYDV than use insecticides left right and centre.

DRC · Jun 5, 2022

Mines the same. I think it’s drought stress, then chemical stress.
Don’t think it’s BYDV or it’d be in patches not random leaves.

davidroberts30 · Jun 5, 2022

Little squeak said:
Some of the leaves are showing this yellowing, 1st noticed it when I was spraying it with Jaunt on 28th May, it has got slightly worse since then. If it doesn't get any worse from now on it won't affect the yield much but does any one know what has caused it?
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Not as yellow as mine

SilliamWhale · Jun 5, 2022

davidroberts30 said:
Not as yellow as mine

I'm glad you said that as I've had some horrific looking spring barley this year. Some fields worse than others.

I could see the bydv rings emerging and rightly or wrongly I've given it insecticide

Imo a lot of bydv this year coupled with cold

Hindsight · Jun 5, 2022

silverfox said:
Mines the same. I think it’s drought stress, then chemical stress.
Don’t think it’s BYDV or it’d be in patches not random leaves.

BYDV in autumn sown crops tends to show as patches - as if the aphids transmitting the virus are not controlled they breed and spread plant to plant. In spring crops tend to be isolated plant which is the initial plant an infected aphid lands on. As spring crops are only in ground for a short time the virus does not have time to spread to damaging patches. It is almost impossible to stop BYDV in spring cereals as as son as one has sprayed the next day or so more aphids can fly in. This contrasts with control in autumn sown crops where the control mechanism relies on migratory flights ending and with no subsequent inward migration controlling the aphid population removes the vector. Well that is my understanding. I never recommend a spring aphicide treatment because of this, but I see many spring recommendations for pyrethroid. I should say this is in Lincolnshire where we do tend to get some winter frost. And not a warmer climate.

Little squeak · Jun 5, 2022

Thanks for all the replies, just to add I haven't sprayed for aphids but have sprayed twice with MnSO4 at 4kg/Ha as well as using Mn treated seed. The yellowing on the leaves is worse where barley is following grass which could indicate an aphid carry over from last year in what has been a really mild winter.

ffukedfarmer · Jun 5, 2022

Mine is the same. Agronomist didn’t seem concerned.

davidroberts30 · Jun 5, 2022

SilliamWhale said:
I'm glad you said that as I've had some horrific looking spring barley this year. Some fields worse than others.

I could see the bydv rings emerging and rightly or wrongly I've given it insecticide

Imo a lot of bydv this year coupled with cold

All the SB locally looks like it
I think it's more environmental than just virus

clemmo · Jun 5, 2022

davidroberts30 said:
All the SB locally looks like it
I think it's more environmental than just virus

Agreed, it seemed to coincide with cool nights

DeeGee · Jun 5, 2022

Got some like that this year, but not enough to worry about.
As has been said it’s virtually impossible to prevent it in spring barley.

But last year much of my spring barley looked awful right through; classic symptoms of Manganese deficiency - which we always get - but even with two sprays of Mn it hardly altered.

Most fields were extremely patchy right through, with some three tonne patches randomly interspersed with sparse crop that would have struggled to make 30 cwt/ acre. Overall yield struggled to get much over two tonne an acre.

Nobody could offer an explanation or remedy the situation, and I certainly wouldn’t want another season like that. By contrast this year’s crops in exactly the same fields, with similar inputs are looking exceptionally good.

Very hard to explain why two seasons could be so different?

maen · Jun 5, 2022

clemmo said:
Agreed, it seemed to coincide with cool nights

So what has happened to global warming and balmy warm nights and bright sunny days??

Spencer · Jun 5, 2022

Little squeak said:
Some of the leaves are showing this yellowing, 1st noticed it when I was spraying it with Jaunt on 28th May, it has got slightly worse since then. If it doesn't get any worse from now on it won't affect the yield much but does any one know what has caused it?
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Not a lot

Whats wrong with this spring Barley?

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100% I’ve had enough of farming!

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