APPLICATION TIMING LIMITS FOR POST HERBICIDES IN DRY BEAN
Delays in timely application of post-emergence herbicides in dry bean have occurred due to wet conditions. As a reminder, the following is a listing of the POST herbicide application timing limits based on bean growth stage:
*Pursuit, Raptor, and Reflex - prior to flowering.
*Assure II, Basagran, Poast, Rezult and Select - 30 days prior to harvest.
Delay in herbicide application generally will require higher herbicide rates, increased chance of weed escapes, and potential bean yield loss. Also, application of Pursuit, Raptor, and Reflex during bean flowering will likely reduce seed yield due to blossom and pod damage or abortion.
Refer to herbicide labels for specific instructions on use.
SOUTH-CENTRAL ND CROP SCOUT REPORT (July 23-24)
The NDSU Extension Service crop scouting program in south-central North Dakota continued this week with the emphasis on disease and insect presence in small grain. On July 23-24, 28 fields (4 barley, 1 durum, 1 winter wheat, and 22 spring wheat) were checked in Barnes, Stutsman, Logan, McIntosh, Emmons, Burleigh, and Kidder counties. Wheat was in the early-milk to late-dough stages and the barley and winter wheat were nearing swathing. Septoria leaf spot was present in 17 of the wheat fields with more mature fields having full incidence (100% of plants) and low to moderate severity (2-25% of flag leaf area). The remaining wheat fields were showing symptoms of tan spot with high incidence and moderate severity (6-30%) on the flag leaf. Leaf rust was present in all but 2 of the winter and spring wheat fields with varying incidence (8-100%) and intensity (1-30% of the flag leaf). All four barley fields showed signs of net blotch and Septoria in high intensity but low severity. Scab was visible in 17 wheat fields but in low to moderate levels (2-18% incidence & 7-58% of the head). Loose smut has also been observed in 14 of the scouted fields with 2-8% incidence. Black chaff was seen in five fields; this disease shows up black on the base of the glumes and gives a “barber-shop pole” effect on the awns. Glume blotch also has been seen on heads in seven fields. Stem rust was observed in a small, immature patch of barley. Stem rust may become more common in late-planted barley. Grasshopper numbers in field margins were low.