Septoria spreading as wheat T1 fungicide timing nears

摘要

Wheat growers are being advised to focus more closely on their T1 fungicide spray this season. After a very wet March, robust rates of SDHI mixtures are recommended as yield-damaging septoria is creeping up onto the upper leaves of crops.With many early TO treatments delayed or abandoned due to the wet weather, the protection that the T1 spray brings to leaf three is vital to prevent the disease from spreading.Fungicide expert Jonathan Blake, at crop consultant Adas, says he is seeing septoria even on wheat varieties with good resistance to the disease, due to the conducive wet conditions. "All wheat varieties are more susceptible to septoria this year due to the mild autumn and then the very wet March,” he tells Farmers Weekly.