Field Observations

by: John Woerner

Fungicide makes a difference even in 70 bushel soybeans. Applications of a fungicide plus an insecticide added over 5 bushels to already 70 bushel beans. If you made a fungicide application this year, pay attention to each variety’s response. Some varieties do respond differently.

SDS reared its ugly head in a few fields this year with dramatic affects. Several reports of SDS affecting either entire fields or wide swaths in a field with yields being dragged as low as 35 bpa. Again, pay attention to the varieties being affected and those that weren’t. Also, SDS could be an indicator of a high SCN population. Keep these thoughts in mind when selecting your soybean varieties for next year.

Considering a fall herbicide application? Select your spring herbicide now to prevent possible stacking of like chemistries. Odds are the winter this year will be different from last year (frozen from start to finish not allowing herbicides to dissapate), but why take the chance? Check product labels, restrictions are clearly marked.

Based on results from plant tissue tests, sulfur and zinc levels in corn have been on the decline. Whether this result is due to lower levels obtained from the atmosphere or due to higher production levels or a combination of both is unclear. What is clear, though, is that these nutrients need to be supplemented. Both can be added to dry fertilizer or as a liquid with spring applications. Sulfur is a component of several enzymes that regulate photosynthesis and nitrogen fixation. Remember from our discussions, we want to maximize photosynthesis as late into the season as possible. Proper Sulfur uptake needs to be maintained.

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