Monday, October 9, 2017

Top 20 Questions from the 2017 Growing Season

As this season comes to an end, it seemed an appropriate time to do a countdown of the Top 20 questions that were asked during the 2017 growing season.

20.  Should I replant my corn or soybeans?

The Midwest experienced one of the largest replant situations during the spring of 2017.  Burrus seed quality and seed treatment was a saving grace, but for those that planted directly ahead of some heavy rain, there was no escaping #replant17. Replant considerations were based on Burrus corn and soybean replant charts (stand and planting date), but other considerations were hybrid/variety selection, weather, as well as disease, pest and weed pressure.
Additional information: Progressive Farmer, AgWeb

19. Should I use seed treatment on my soybeans?
The importance of seed treatments on soybeans was easily observed in 2017. An example is the insecticide component control of bean leaf beetles with early planting and grape colapsis control in double-crop soybeans. Even though this was not a year for the visual symptoms associated with sudden death syndrome, we are hearing reports of yield increases with use of PS SDS (ILeVO®). Insects and diseases are cyclical, but seed treatment can provide insurance to protect your seed and provide return on investment. 
Additional Information: ILSoy Advisor - Seed Treament Evaluation, ILSoy Advisor - Treating Naked Soybeans, Burrus Buzz 

18. Got grubs and should I treat for Japanese beetles? 
During planting this year, we began to receive many reports of grubs. Some learned that you could identify the grub by examining hairs on their hind end and most appeared to be Japanese beetle larvae. With the mild winter, we knew there could be the possibility of high Japanese beetle pressure, which often can be worse on field edges. Scouting and thresholds were a must, and some soybean fields in western Illinois were treated up to three times!
Additional Information: Burrus Buzz, Progressive Farmer, Successful Farming, Pekin Daily Times 

17. Should I grow cover crops this year?
Many realized that cover crops, especially in corn, could serve as a "green bridge" that invited pests to their field for a feast. This made it more important than ever to terminate cover crops before planting to help deter pests such as armyworm and cutworm. Those that scouted could use thresholds and treat. On a positive note, we also witnessed how cover crops could conserve moisture within the seed bed, which helped to avoid replant in dry planting conditions.
Additional Information: University of Illinois Extension, Prairie Farmer, IL Nutrient Research & Education Council 

16. Do I need to treat for black cutworm?
Winter annuals from those that did not implement a fall burndown or tillage were the perfect place for cutworms to lay their eggs this spring. With our PowerShield® seed treatment and Bt traited corn hybrids, we often do not need to worry about cutworm, however, when we plant or replant corn hybrids without Bt traits, especially late in the season into fields with minimum till/no-till, the risk for cutworm increases. Seed treatments can only last so long. Without the Bt trait, rescue treatments were made if black cutworms and plants were small and pest populations exceeded 3%.
Additional Information: Prairie Farmer, Think Burrus blog, Prairie Farmer - Scout like a pro 

15. What are the white spots and will this affect my corn? 
Paraquat used for burndown before soybean planting unfortunately can drift to a neighboring corn field. The end rows were severely stunted, but for the most part, the remaining field could "grow out" of the contact damage sustained to older leaves. There is also a bacterial disease called holcus spot, which can be confused with paraquat injury, that was found throughout the state this year. Wounds are needed for infection and it is not considered to be a threat. One way to identify herbicide injury is to look for "white spots" on broadleaves, because holcus spot will only affect grass species.
Additional Information: Dr. Carl Bradley 

14. Why is my corn stunted and roots rotted?
In a few instances, fields that received heavy rain, and perhaps did not have adequate drainage, were infected with pythium root rot in low lying or stressed areas. PowerShield seed treatment, specially equipped with a new addition of ethaboxam, kept most pythium species at bay. However, pythium needs water to infect corn and soybeans and some corn stands needed to be evaluated.
Additional Information: Progressive Farmer, Prairie Farmer, Think Burrus blog 

13. What rot is hot in soybeans?
Unfortunately, our cool, wet spring was followed by some hot, dry weather. Depending on the environment, PowerShield seed treatment could help for some root rot pathogens, but after that the disease triangle will tell the tale. Pay attention to environmental conditions, soybean variety, and cultural practices to help predict any disease threats. We saw diseases such as rhizoctonia, root rot, charcoal rot, stem canker, white mold, sudden death syndrome, as well as brown stem rot.
Additional Information: ILSoy Advisor 

12. Why is my corn floppy?
If we run into excessive drying of the upper soil surface, rootless corn can result. In some instances, we did have to rule out root rot disease. Yes, it can be worse with shallow seeding (<1 to 1.5"), but perhaps the main problem was furrow erosion due to heavy rains. Some try cultivation to pull moist soil up from below onto roots, but ultimately the main cure is a good rain.
Additional Information: Purdue Extension 

11. Can I lower my soybean population? 
Disadvantages of higher planting populations can include lodging, plant competition, increased disease pressure, as well as an overall decrease of branches, pods, seeds, and therefore, yield per acre. With seed treatments like PS SDS, research has shown you can reduce your planting population, protects your seed investment and help to reduce seed cost. Special shout out to our customers Terry Gerken and Aaron Rice for participating in the North Central Soybean Research Program's on-farm population trial with the help from the Illinois Soybean Association.
Additional Information: ILSoy Advisor 

To see the top 10 questions asked this season, see my corresponding Burrus Buzz article.

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