Take-all in first wheat.

[DrWazzock]

Why is it so bad?
Sprayed too late after we got heavy rain as the ears emerged?
Wet weather generally at flowering.
Wrong or too little product? 0.6 litres teb.
Zero till?
Stress?

 

[bankrupt]

Stress?

Good point, DrWazzock.

This last 10 months have been by far the most stressful I can ever recall since the Great Blizzard when barns fell down killing several cows and milk from those remaining had to be poured away.

Winter of 1946–47 in the United Kingdom - Wikipedia

en.wikipedia.org

For several locals here however, 2020's been far less stressful than they can ever recall, being on furlough, not having to commute daily to the city (thereby saving a small fortune at Starbucks and M&S).

Unfortunately, wheat's not been able to take much real advantage of this.

 

[DrWazzock]

I had become more optimistic about my wheat up to the point when this fusarium showed itself. It will seriously dent yield and quality here, lowering bushelweight with shrivelled grain. Plenty of wind will hopefully put the shrivelled ones over the back though. One of those years from start to finish. Wondering what I could do to reduce future fusarium risk though. Could do better perhaps.

 

[Brisel]

Why is it so bad?
Sprayed too late after we got heavy rain as the ears emerged?
Wet weather generally at flowering.
Wrong or too little product? 0.6 litres teb.
Zero till?
Stress?

Probably a combination of all of them. I did a slightly higher rate of teb for T3 but that's all as there simply wasn't the disease around to justify more at the time. I've got a few ears like yours. As the crop senesces, you notice them less.

 

[Worsall]

I had become more optimistic about my wheat up to the point when this fusarium showed itself. It will seriously dent yield and quality here, lowering bushelweight with shrivelled grain. Plenty of wind will hopefully put the shrivelled ones over the back though. One of those years from start to finish. Wondering what I could do to reduce future fusarium risk though. Could do better perhaps.

Just one of those things I'm afraid, I did a comprehensive teb and proline on Crusoe to maintain quantity and quality, perfectly timed, slow, forward backward nozzles and I have similar to you. The unaffected ears and parts look good though, so I think either I was either too late on my application or totally outside my control and due to stress. Good Luck.

 

[Brisel]

Fusarium infection can occur as the ears emerge, so by mid flowering T3 (3 weeks after flag spray) it's too late.

 

[DrWazzock]

Fusarium infection can occur as the ears emerge, so by mid flowering T3 (3 weeks after flag spray) it's too late.

That makes sense. A lot of the infection here is in the upper half of the ears. So they were probably already infected by the time the T3 was applied at full emergence. The bottom half of the ears maybe saw some benefit from the spray, being fully emerged slightly later. After a very dry spell it rained here quite a lot at ear emergence so the spray timing was slightly delayed.
If the ear isn’t fully emerged at application, won’t the bottom half be unprotected or does the spray have some systemic action?
With the boots splitting I suppose emergence isn’t a simple as progressive starting at top either.
Maybe a split dose would help.
Always worse on the light land. Not sure why if it is supposedly a pathogen spread by rain splash. General stress and poor health of the plant maybe.
Next year Rodney, next year.