Protect your yield all the way to harvest

August 1, 2019

As we film our video and write our Agronomy Focus Blog, we are starting to see planes flying.   We know it has been a wet year which often leads to disease issues in both corn and soybeans.   We also know that Thistle Caterpillars have been an issue across much of our area.   All these issues lead to active airports and lots of planes in the sky.   
 
When we think of the need for corn or soybean fungicides, we really have four questions to ask ourselves:
  1. What is the level of disease pressure we see out there?     
  2. What is the disease tolerance or response to fungicide score for our hybrid/variety? 
  3. What is the weather forecast going forward?
  4. Can we expect plant health/yield benefits beyond disease control to justify application?
We need to consider all these factors.   We normally start with monitoring disease pressure.  To do this well, someone needs to do a good job scouting our fields.   That is not an easy task with 100+ degree heat indexes, pollen shed, and soybeans reaching canopy.   Someone still needs to do the grunt work to scout and correctly identify diseases.   Make sure you know what to look for and remember many diseases start in the bottom of the canopy, but some others start at the top.   You need to look at both.   Get a good guide to identifying diseases if you don’t have one.    UNL has some great resources available:
Keep in mind that not all crop diseases can or should be treated economically.   A good example in Nebraska is Bacterial Leaf Streak.  It can be easy to confuse Bacterial Leaf Streak with Grey Leaf Spot.   One is caused by a fungus (GLS) while the other (Bacterial Leaf Streak) is caused by bacteria.   Fungal diseases can be controlled by fungicides.  Bacterial diseases cannot.   Don’t spend fungicide dollars combating a disease that the fungicide will not impact.   You may still get plant health benefit from a fungicide, but it will not control bacterial diseases such as Bacterial Leaf Streak or Goss’s Wilt. 

If you have questions, contact you CVA Field Sales Agronomist.   They can help you with disease diagnosis, understanding the disease tolerance of the variety or hybrids in your fields, and the proper fungicide recommendation if treatment is warranted.  

We have several weeks to go before this crop is ready to harvest.  Make sure you can take advantage of the good corn prices this year by maximizing your yield while spending input dollars intelligently.  

by Tim Mundorf
 

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Posted: 8/1/2019 8:18:03 AM by Mallory Wittstruck | with 0 comments