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Wheat crops on fragile ground with threat of septoria and rust

The sunny, warm but showery spring weather is causing potential issues for wheat crops, with enhanced risk of septoria and rust.

Quoted in the Farmer’s Weekly, Andrew Melton, who is regional agronomy sales manager with advisory group Frontier, says: ‘The current cold weather is holding back disease, but showery weather could easily make spray choice interesting at the T1 fungicide timing when leaf three is fully emerged.’

Melton’s policy ranges from applying nothing, on say a late-drilled crop of the variety Extase, to a tebuconazole/folpet mix on more susceptible varieties, with the multisite added with an eye on protectant septoria control and helping with resistance management.

‘For the T1 timing, I can not see why we would not go for the new chemistry,’ he says.

For new chemistry, he is focused on the new azole mefentrifluconazole with the SDHI fluxapyroxad in the form of Revystar, which had its first full season of use last year.

From last year’s experience, he will look to boost Revystar’s rust control with the strobilurin pyraclostrobin where needed, and look at adding folpet.

If no T0 was applied then the correct timing of the T1 spray become more critical.

Melton is cautiously optimistic, saying the potential of the Norfolk wheat crop is looking promising, but, he adds; ‘In Norfolk, we are only ever 10 days from a drought.’