Yellow tipping in barley and wheat, spring sown?

[TelesnaAg]

I'm perplexed as to what's causing this,,

The area was sown to winter beans last year, dirt is acidic, it's gone very dry, sown with MAP.

Is it just N starvation or aliminmum toxicity? Also seems like some net blotch in barley and early septoria in the wheat?...

There two barley and two wheat types in this trial. Seems to be worse at the driest part of trial.

Any help appreciated.

Ant..

 

[phil]

Can you do a leaf analysis for nutrients, see what's lacking the most ?

 

[miniconnect]

here in our rather low tech pat of the world, thats usually due to either too wet, too cold or very compacted ground. often first appears on the headlands. either way a small dose of N is the normal cure here.

 

[CORK]

Is it quite uniform across the crop? First thought I had when I saw it was barley yellow dwarf virus.

Are you ok for Sulphur?

 

[Flat 10]

Old leaves is it? Doesn't look that bad to me..............

 

[TelesnaAg]

It's been warm and dry since the tipping started...so could very well be moisture related...the agro suggested to water a section and see what it does which is a good idea..I will also put some N and S on a section and see if it recovers quicker etc...

I sowed to early for the wetter soil part of the trial, I'm suprised it didn't come up that well but I've learnt...the other of trial is woeful dirt and dry as a chip and crop is bouncing along...

I will check soil test for S...?...I'm thinking I'm lowish....

Ant..

 

[TelesnaAg]

Just checked my soil test results and I am high in Sulphur....

So maybe an N issue or just the dry weather?...

Will water a spot up and see how it goes...

Ant...

 

[TelesnaAg]

Is there any chance this is magnesium deficiency?...some of the yellow on leafs is a bit striping if you look close....

Just a thought..

Ant..

 

[clemmo]

Personally I would do a tissue analysis

 

[shakerator]

I'm perplexed as to what's causing this,,

The area was sown to winter beans last year, dirt is acidic, it's gone very dry, sown with MAP.

Is it just N starvation or aliminmum toxicity? Also seems like some net blotch in barley and early septoria in the wheat?...

There two barley and two wheat types in this trial. Seems to be worse at the driest part of trial.

Any help appreciated.

Ant..

How did this end up? I have some barley looking similar

 

[TelesnaAg]

it was N and the dry stress made it P defecient as well..i through urea out in strips and watered in and it made the plant thrive better didnt totally take the yellow from the leaf. i reckon a foliar n with some trace would have greened it right up...getting in through roots is slow remedy.

is there and purple showing up or just yellow?

Ant..

 

[shakerator]

it was N and the dry stress made it P defecient as well..i through urea out in strips and watered in and it made the plant thrive better didnt totally take the yellow from the leaf. i reckon a foliar n with some trace would have greened it right up...getting in through roots is slow remedy.

is there and purple showing up or just yellow?

Ant..

Yes looked today and think it's BYDV
Had an insecticide last week but too late by looks of it never seen it this early on Spring barley , could find odd aphid but hardly plastered in them

 

[horizontal]

Yes looked today and think it's BYDV
Had an insecticide last week but too late by looks of it never seen it this early on Spring barley , could find odd aphid but hardly plastered in them

May be wrong but not convinced that's BYDV. Lot of stress showing in spring barley at the moment. Frost damage on soft tissue is very evident as well as compaction, lack of N etc etc.
Even if it is BYDV there is no flight cut off in spring so don't see what good an aphicide is going to do.
A certain very reputable independent agronomy organisation found little response to insecticide use in spring barley and the effect could not be attributed to BYDV control.

 

[shakerator]

May be wrong but not convinced that's BYDV. Lot of stress showing in spring barley at the moment. Frost damage on soft tissue is very evident as well as compaction, lack of N etc etc.
Even if it is BYDV there is no flight cut off in spring so don't see what good an aphicide is going to do.
A certain very reputable independent agronomy organisation found little response to insecticide use in spring barley and the effect could not be attributed to BYDV control.

Hope your right although they do look like hotspots from afar, there is the possibility it could be poor soil / nutrient conditions as you wouldn't think you would see symptoms this early given cold April ?

 

[TelesnaAg]

looks like bydv...the crop is green so its not n stress...and if you found the odd aphid...keep checking leaves to see if purpling shows up...

id check with an agro but id be inclined to do a foliar N spray to give it a quick growth spurt, i also use rapisol which has mn cu and zn...the high n concentration can throw the disease of course and really encourage younger leaves to fire and tillering...

Ant..

 

[shakerator]

looks like bydv...the crop is green so its not n stress...and if you found the odd aphid...keep checking leaves to see if purpling shows up...

id check with an agro but id be inclined to do a foliar N spray to give it a quick growth spurt, i also use rapisol which has mn cu and zn...the high n concentration can throw the disease of course and really encourage younger leaves to fire and tillering...

Ant..

Yes there is some purpling. You think it's possible to recover a crop from virus?

 

[TelesnaAg]

yes, theres two steps to this problem.

1. you need expert advice on the bydv insecticide to make sure your covering all bases as far as the disease goes, is another insecticide worth it or more to the point will it be effective.

2. Crop nutrition, as mentioned id look seriously at foliar N...i use UAN 42 %...15 -20 l/ha with some trace...this shouldnt add that much to crop cost as you can back the granular N off a little....fine spray nozzles...you want to go through leaf not roots...if you can prevent it spreading to newer leaves and get some more tillers you could still pull yield...the crop looks young enough to do it....


my spring barley was woeful due to dry, it never got any rain and i mean any!...i watered sections and through out N...and those parts werent to bad...the plants greened up and head size was good...my establishment numbers were poor from rolling it when planted and it compcted that tight it couldnt punch through....this year i wont roll...just drag some pipe and horrows to fill in seeder rows...

if you get told crop is a write off, make sure you atleast do some foliar spray strips to make sure they were right...

Ant...

 

[Brisel]

Older leaves suggests nitrogen or magnesium deficiency but it's hard to tell from what has been posted.

A leaf tissue test will help

 

[B'o'B]

yes, theres two steps to this problem.

1. you need expert advice on the bydv insecticide to make sure your covering all bases as far as the disease goes, is another insecticide worth it or more to the point will it be effective.

2. Crop nutrition, as mentioned id look seriously at foliar N...i use UAN 42 %...15 -20 l/ha with some trace...this shouldnt add that much to crop cost as you can back the granular N off a little....fine spray nozzles...you want to go through leaf not roots...if you can prevent it spreading to newer leaves and get some more tillers you could still pull yield...the crop looks young enough to do it....


my spring barley was woeful due to dry, it never got any rain and i mean any!...i watered sections and through out N...and those parts werent to bad...the plants greened up and head size was good...my establishment numbers were poor from rolling it when planted and it compcted that tight it couldnt punch through....this year i wont roll...just drag some pipe and horrows to fill in seeder rows...

if you get told crop is a write off, make sure you atleast do some foliar spray strips to make sure they were right...

Ant...

What water volume are you putting the foliar N on with?

 

[TelesnaAg]

What water volume are you putting the foliar N on with?

100 l/ha...

15-20 l/ha max

cant remember the trace pack rate..

everytime ive put chemical in or anything else i got scorch...rapisol is the only copper product ive got on without scorch...

simple brew....and not to dear...

if there is purpling on leaf its either bydv or P defiecent...given the leaves look ok in colour and plant looks healthy id be betting bydv...

Ant...