Published on Thursday, February 7, 2019
Winter wheat breaks dormancy if there is a two-week period with an average temperature of at least 41°F. As soon as the plants resume growth, you need to get back out in the field so that you can make critical decisions about nitrogen, insecticide, fungicide and most importantly, preserve yield potential.
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Splitting the nitrogen application reduces risk of loss to the environment, and reduces risk that the plants take up too much nitrogen at once and become rank. Rank plants are more likely to lodge.
PFR PROVENTM - two pass N system to maximize yield & minimize N losses of UAN or Urea
Use tiller counts to determine necessity for early N application and rate
# of Tillers
Nitrogen to Apply
0 - 2
40 – 50 lbs. (50-60 lbs. no-till)
40 – 50 lbs. (50 – 60 lbs. no-till)
3 - 4
30 -40 lbs. (40 – 50 lbs. no-till)
50 – 60 lbs. (60 – 70 lbs. no-till)
5 or more
80 – 90 lbs. (110 – 120 lbs. no-till)
Tiller counts are essential for making management decisions. Photo from Michigan State.
Pallisade EC is a Plant Growth Regulator (PGR) that keeps the plant for getting too tall, which reduces the risk of lodging.
Warm, wet weather during flowering increases the odds of head scab infection. Fusarium head blight, also called FHB or head scab, is a fungal disease caused by Fusarium graminearum. This fungus produces a vomitoxin (DON) in the grain. Grain with high DON levels in unsuitable for feed and is likely to be rejected at the elevator. Apply fungicide during early flowering at Feekes 10.5.1 or when more than 50% of plants are flowering to mitigate head scab. In most areas, flowering is a 7-10 day window. In general terms, it is better off to spray a few days too late than to spray too early before anthers are visible. Local scab predictions are available through local extension service.
A single application at Feekes 10.5.1 (flowering) provides best protection against foliar disease and fusarium head scab.
Avoid strobulirin fungicides after flowering because their use can increase DON in grain if applied after Feekes 8.
If you are interested in other PFR Proven products and practices to help you make the most of your wheat crop, check out the PFR Wheat Book available at www.beckshybrids.com under the PFR tab.
Flowering on each wheat head starts at the middle of the head, then moves up and down. Similarly, tillers will flower after the main head. Time your fungicide application to optimize the number of open flowers, while not waiting so long that you allow the disease to take hold.
It is important to use an insecticide seed treatment like Escalate yield enhancement system and/or a fall applied insecticide to control aphids. Aphids are piercing sucking insects. Direct feeding via piercing-sucking mouthparts removes plant sap and damages plant health. Some aphid species (bird cherry-oat aphid in particular) also vector a viral disease called Barley Yellow Dwarf. There is no control option for the virus, so keep aphid populations low to avoid yield loss.
Armyworm feeding on the leaves typically occurs at night. In the daytime, the larvae hide in litter at the soil surface or under clods of soil.
Author: Steve Gauck
Categories: Agronomy Talk