How bad does brown rust need to be to warrant a T4?

[shakerator]

is there a compromise here or if any active pustules are seen should we be in with the teb? Crop is high potential grains filling well after flowering

Can't find an online decision aiding tool

TIA

 

[John Slejpner]

In with the teb asap, esp looking at the forecast.
If you have high potential and not short of water you might (i would but that means nowt) consider a bit of comet.

With usual proviso of checking label.

I am not qualified to give any advise on the matter, but i did note more brown rust on untreated wheat at cereals than i expected to see. Mostly Crusoe's fault.

 

[Neddy flanders]

How long ago was T3? And what was it?
We always do a T4 and found it vital in last couple of years. To be honest, T3 fusarium timing is too early to provide Foliar disease cover til the 7th of July. T4 going on this weekend and early next week here. 0.6Teb

 

[shakerator]

How long ago was T3? And what was it?
We always do a T4 and found it vital in last couple of years. To be honest, T3 fusarium timing is too early to provide Foliar disease cover til the 7th of July. T4 going on this weekend and early next week here. 0.6Teb

3 weeks proline

What sort of responses are you seeing from the T4? It will be too hot this weekend imo

 

[Neddy flanders]

if T3 was proline, and you can see any brown rust pustules, I'd be putting teb +/- Morpholine on NOW. with hot weather, next time you look, crop will be brown. Proline will have done nothing to the Brown Rust

 

[Colin]

That's our last spray done, prosaro+ctl. Wheat could be cut late august, early September. Had brown rust in rye last year but it's got to die from something
What's the options for T4 legally, teb ?

 

[Colin]

PS saw brown rust in triticale 2 months ago!

 

[franklin]

Amistar is cleared for wheat until GS71 (watery ripe), as is SunOrg Pro (metconazole) or Folicur (tebuconazole). There is also pyraclastrobin (Comet) which is also fine to GS71). I am not aware of anything with a later cut-off.

 

[Flat 10]

If I was really worried I think I would teb + amistar it.....
What variety?

 

[fudge]

Looking at the AHdb control curves why not use .25 of comet for brown rust?

 

[Happy]

That's our last spray done, prosaro+ctl. Wheat could be cut late august, early September. Had brown rust in rye last year but it's got to die from something
What's the options for T4 legally, teb ?

Got to die of something but still 11 weeks until 1st September.
Got the same dilemma here. Head spray on exactly a week ago but crops look really well so think some Teb plus @Iben's approach of legal tidy up of what's left in store will be going on in a fortnights time.

 

[David.]

I think brown rust is the one that catches you out, everyone is paranoid about yellow rust right from T0, but it is a very long time for one spray to cover from now 'till August bank holiday, which is usual wheat harvest

 

[ZXR17]

Which variety ?
I was just about to start a thread when I read this.
My Crusoe has brown rust badly in places, up to leaf two in places, despite having .45 Teb in the ear wash two weeks ago.
I have just ordered more but won't be here until next week.
As asked by @shakerator , how bad does it have to be? I haven't had this problem before.