 |
ProCrop |
Early Fungicide Applications
Early season rains or saturated soils allow tan spot and Septoria leaf diseases to infect wheat, especially wheat planted in last years wheat ground. Fungicides applied to 4-5 leaf wheat have given economical responses in a number of North Dakota locations in years with wet springs and wet, moderate temperature growing seasons.
In 1992 an average five percent response to a one pound application of mancozeb was measured over 4 locations, while a seven percent response occurred averaged over 7 sites in 1993. In 1994 variable responses to early season fungicides occurred, with several sites showing no yield increase while other sites responded with 10% - 15% yield increases. In 2002, at Fargo, 4-5 leaf applications resulted in 2% to 8% yield increases. In 2003, 3% to 6% increases were measured in trials in Fargo and Langdon.
No significant tank mix problems have been reported with herbicide and fungicide product tank mixes. However, a jar test should be conducted before mixing chemicals in spray tank. Tank mixing has caused some loss in weed control with a few herbicides, however. Check labels for tank mix information and tank mix restrictions.
Fungicide applications at the 4-5 leaf stage should only be considered when:
1. Wheat was planted in wheat stubble.
2. Tan spot/Septoria infections are evident on young leaves.
3. Soil moisture will promote good yields.
4. Wheat stand will promote good yields.
Back to Disease -
Durum/HRS Menu
Back to Fungicides - Durum/HRS Menu
Back to Durum/HRS Menu
Back to Main ProCrop Index
