The practical flexibility of the new SDHI fungicides could change the focus and the cost of the T3 spray this season, agree agronomists. The extra persistence on offer from the use of SDHIs on the flag leaf means that, in most situations, the three traditional roles of the T3 spray can be reduced to just two. Before the SDHIs came along, there was a need to top up the foliar disease control provided by the previous sprays, as well as to give brown rust and fusarium control.
展开▼
