Pay close attention to Pre-harvest Intervals this year when spraying fungicide on wheat.
Some Kansas wheat was temporarily embargoed fields had been treated with Quilt fungicide beyond the appropriate pre-harvest interval for that product (45 days). The following pre-harvest intervals are indicated on currently registered small grain fungicides:
Headline Feekes 10.51 (approximately 40 days. High temperatures can push crop to Feekes 10.51, which is flowering, more quickly.)
Quadris: 45 days
Caramba: 30 days
Folicur: 30 days
Proline: 30 days wheat, 32 days barley
Tilt: 40 days
Quilt: 45 days
Stratego: 35 days
Producers and applicators need to heed these PHIs, says Marcia McMullen, NDSU Extension plant pathologist.
"What happened in Kansas is a very strong reminder that labels are the law and must be followed," she says.