Wheat T1

[Reg]

This might help

Palio-Tank-Mix.pdf

 

[Steevo]

Amazing the amount of discussion over a leaf that contributes up to 7% of the yield. Since the flag leaf contributes 50% + then the T2 thread should run to 50 pages

True! Nicely put in to perspective too. Danger is if you let it get in the door early it's harder to keep it out later.

 

[Gong Farmer]

Yes, I suppose you could say that the T1 is contributing to flag leaf protection.

 

[SilliamWhale]

Its amazing how much discussion £15/ha difference gets

 

[Steevo]

Its amazing how much discussion £15/ha difference gets

Cue another 7 pages of discussion on T1 spend....

 

[B'o'B]

Amazing the amount of discussion over a leaf that contributes up to 7% of the yield. Since the flag leaf contributes 50% + then the T2 thread should run to 50 pages

You don’t mess about with 50% of your yield building potential so to my mind there’s not much debate on that front. But how much to spend protecting a leaf that contributes 7% to yield whilst laying the foundation of your control strategy going forward is worthy of more debate.

 

[Properjob]

Nearly done, someone asked about what we do in high pressure areas, answer I don't really know anymore. This year I know plenty of CTL, T0 was somehow timed ok so far. T1 has been Bravo/1L epoxi, PGR, Manganese and mag sulphate. No mildew present or eyespot. Only Costello and Graham grown due to varietal resistance to Septoria. Many would say madness not to use an SDHI at T1. But I don't want to select for strains of Septoria I can't control at the far more important T2 timing. Better off using cheaper protectants and regular timings, T1.5 essential and save the trump card SDHI which may or may not work. Also unless I am mistaken Prothio and Epoxi have the same sensitivity/resistance issues. So rather than stack triazoles with these to protect them, use another at full rate. Each time a fungicide is used you are effectively selecting for strains of disease you won't be able to control later on. I think we have to look at Septoria like spud blight, as for many guys in the dry East, is Septoria really the massive problem many agronomists would have you believe???

 

[Clive]

I dont doubt you can mix fungicide / growth reg / tace elements etc with Palio but you end up with quite a hot mix imo and in previous years I’ve seen it check the crop a bit

For the sake of an extra pass I would rather not take the risk at such important stage in plant growth

 

[B'o'B]

. I think we have to look at Septoria like spud blight, as for many guys in the dry East, is Septoria really the massive problem many agronomists would have you believe???

It’s true we don’t have anything like the pressure in the east that the west does. Most years I don’t put a T0 on and would use Epoxi + CTL as my T1 quite happily and save an SDHI for T2. This year the lack of T0 is beginning to concern me on a couple of early fields due to the length of time leaf 3 has been out and the weather it has been exposed to. The same variety in another field drilled later is less of a worry if I can get over in in the next 4 days.

 

[Properjob]

It’s true we don’t have anything like the pressure in the east that the west does. Most years I don’t put a T0 on and would use Epoxi + CTL as my T1 quite happily and save an SDHI for T2. This year the lack of T0 is beginning to concern me on a couple of early fields due to the length of time leaf 3 has been out and the weather it has been exposed to. The same variety in another field drilled later is less of a worry if I can get over in in the next 4 days.

Yep but as leaf 3 only contributes approx 7% of yield, is it worth exposing your best chemistry for 100% control at this timing only to find it doesn't work at T2, maybe better off controlling 75% of that 7% if that makes sense. In my opinion Septoria control has become a right mess in wheat. No one really knows what the right thing to do is and resistance is everywhere. Best info comes out of Ireland. Any Irish guys on here care to comment, be interesting to know hat they are up to this season?

 

[Clive]

Its amazing how much discussion £15/ha difference gets

That £15 can have big multiplier in some cases and have a knock on effect to later more expensive applications ?

 

[B'o'B]

Yep but as leaf 3 only contributes approx 7% of yield, is it worth exposing your best chemistry for 100% control at this timing only to find it doesn't work at T2, maybe better off controlling 75% of that 7% if that makes sense. In my opinion Septoria control has become a right mess in wheat. No one really knows what the right thing to do is and resistance is everywhere. Best info comes out of Ireland. Any Irish guys on here care to comment, be interesting to know hat they are up to this season?

I don’t think what I do will have much effect on the resistance status of septoria in my locality. The general consensus is 2 SDHI’s as the default program, so the selection pressure is all around.
If septoria takes hold in leaf 3 you need a well timed T1.5 to protect leat 2. I don’t know what is truly best, but I do intend to react as best I can to where I am. In hindsight this was a year that I should have put a T0 across the board, but I didn’t so I’ve got to react to what I’m seeing.

 

[Grass And Grain]

So we're using the figure of 7% of yield comes from protecting leaf 3, BUT if you either don't spray fungicide at t1 or get poor control, does this put more disease pressure and risk of infection for the t2?

Maybe it's not as simple as saying that it will only affect 7% of yield.

 

[Properjob]

So we're using the figure of 7% of yield comes from protecting leaf 3, BUT if you either don't spray fungicide at t1 or get poor control, does this put more disease pressure and risk of infection for the t2?

Maybe it's not as simple as saying that it will only affect 7% of yield.

You definitely have to spray at T1 and T0, the question is what with?

 

[John Slejpner]

Nearly done, someone asked about what we do in high pressure areas, answer I don't really know anymore. This year I know plenty of CTL, T0 was somehow timed ok so far. T1 has been Bravo/1L epoxi, PGR, Manganese and mag sulphate. No mildew present or eyespot. Only Costello and Graham grown due to varietal resistance to Septoria. Many would say madness not to use an SDHI at T1. But I don't want to select for strains of Septoria I can't control at the far more important T2 timing. Better off using cheaper protectants and regular timings, T1.5 essential and save the trump card SDHI which may or may not work. Also unless I am mistaken Prothio and Epoxi have the same sensitivity/resistance issues. So rather than stack triazoles with these to protect them, use another at full rate. Each time a fungicide is used you are effectively selecting for strains of disease you won't be able to control later on. I think we have to look at Septoria like spud blight, as for many guys in the dry East, is Septoria really the massive problem many agronomists would have you believe???

Appreciate your thoughts.
Weather this evening was better than forecast - wind finally dropped about 7:30 so i stopped prevaricating and got 60ha done. Last 15ha down on the floodplain applied with a light dew - lawn still about dry 30 m higher.
Ctl and increased rate of Mantra

 

[Feldspar]

I'll take a bet you go with Aviator

Right! Whole lot just applied and another lot due in tomorrow.

 

[SilliamWhale]

Right! Whole lot just applied and another lot due in tomorrow.

I can read you like a book!

 

[robbie]

I'm still undecided what to do. crops that had a t0 are clean except for some stem browning which I'm not sure is eye spot or not. Leaf 3 is about 1/4 to 1/3 emerged so I'm going to have to make my mind up pretty soon. Stick with epoxi/ctl or tracker/ctl.

 

[Brisel]

Any rust risk? What variety? 1st or second wheat? Previous crop?

Proline + CTL would improve eyespot control but is weaker on rust. Tracker would do both nicely but keep rates high in this unsettled weather

 

[Brisel]

Leaf 3 about half emerged in late Sept sown Siskin here. Very high disease weather though. I'm glad I put a T0 on leaf 4.