From the Field 6-24-2020
Corn stands that were planted early emerged unevenly due to an extended period of cold soil conditions. A combination of nitrogen and sulfur top dress application, plus warming temperatures and moisture, should improve appearance. Corn tissue test results over the past two weeks indicate deficiencies in nitrogen, sulfur, boron, and zinc, and soybean tissue tests also show deficiencies in manganese and copper.
With continued wet conditions, growers should plan to protect their crops with fungicide applications. Livestock producers are becoming increasingly interested in fungicide use on alfalfa and corn intended for silage. Sweeping alfalfa yielded threshold levels of aphids.
Please reach out to our agronomist for scouting recommendations as we move through this critical phase of the growing season.
In our eastern trade territory, we are finishing up post applications on corn, whether topdressing or spraying, and soybean post-spray applications are starting to pick up. We should be thinking about running Warrant or Dual to keep the waterhemp at bay.
We have also been seeing some infestations of armyworms, mainly in conventional corn and/or wheat fields. We did see some armyworms work over to traited corn, with lower numbers. If armyworms get to be an inch and quarter long, they are at the end of larvae state and will be pupating soon. They will not do a lot more damage after that, but we will most likely have another cycle, so if you have 2-5 per plant or per sq. foot, you should spray asap—the damage can be terrible, with all leaves stripped or heads getting clipped. Contact your Landmark agronomist to look over these fields if you see anything out of the ordinary.