Wheat School: How T3 fungicide impacts winter wheat yield

Should Ontario winter wheat growers apply a T3 fungicide to protect the crop from fusarium infection?

That's the question RealAgriculture's Bernard Tobin and University of Guelph associate professor Dave Hooker tackle on this episode of the Wheat School.

When it comes to yield response, extensive research conducted by Hooker and his colleagues indicate that, on average, winter wheat will produce an extra 8.8 bu/ac when sprayed with a fungicide at the T3 timing.

Yield response, however, does vary significantly, according to the research: 25 percent of the responses produced yields of 11.5 bu/ac or greater; 50 percent yielded between 11.5 and 5.5 bu/ac; and 25 percent produced 5.5 bu/ac or less. Given current wheat prices — in the $15 bu/ac range — Hooker says its not difficult to rationalize or justify investing in a T3 fungicide.

Hooker says based on the data, his default position is to spray a T3 fungicide to suppress fusarium and reduce deoxynivalenol (DON) production... and then look at the weather and growing conditions to justify not spraying.

#farming #wheat #fusarium #spraying

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[EDBZ]

does yield response from T3 application at 8.8bpa rely on the prior applications of T1 & T2?