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T2 is approaching winter wheat in the North. What should you consider?

Innovation Centres
22.05.2018
North

After such a wet April the weather has improved and winter wheat crops have caught up.  Not all crops received a T0 spray making T1 even more important, with many adapting their T1 to be more robust.  T2 sprays are being applied in the South, East and West if they haven’t gone on already while T2 timing is fast approaching in the North.

 

Crop Monitor results indicate that rainfall in April and May has a big influence on Septoria tritici development.  The recent dry weather during flag leaf emergence means that in most situations the T2 spray should be largely protectant.  Don’t forget that disease develops unseen inside the leaf and isn’t visible on the leaf surface until it has damaged yield potential, so for those yet to spray, if the weather turns and Septoria gets onto the flag leaf it is no longer possible to cure it later at T3. 

 

Septoria has been visible lower down in many crops making flag leaf protection even more important to prevent the disease spreading up the plant and reduce yield loss.  Consider including BRAVO® alongside ELATUSTM Era to provide an extra mode of action to for resistance management and for added Septoria performance.

 

Persistence should be an important feature of your T2 spray.  The moisture availability is good currently and the long term weather forecast is not for a hot and dry finish to the season.  This means it could be a long time until harvest so persistence will be key to keeping your crop healthy.

 

In many winter wheat crops yield potential is good this season and green leaf retention helps to drive yield further.  You can increase yield by 0.15t/ha every day that green leaf area is at or above 37%*.  Results from our York Innovation Centre show that ELATUS Era gave excellent control of Septoria and compared to an alternative SDHI extended green leaf retention by 5.5 days, offering an extra 0.9t/ha.

 

* Reading University