Saturday, April 13, 2013

Sugar

Spraying sugar on crops has been a cussed and discussed topic on NAT.  Here are other discussions of spraying sugar on crops.  We started doing this in the 80's when batches were available for free or low cost at our local corn wet miller.

On-Farm Research Results: Sugar Applications To Corn And Soybeans   Source: University of Nebraska

From: Jenny Rees, Extension Educator; Gary Zoubek, Extension Educator; Keith Glewen, Extension Educator; Tamra Jackson-Ziems, Extension Plant Pathologist; Casey Schleicher, Plant Pathology Extension Technologist; Todd Whitney, Extension Educator

April 4, 2013 -- Using the application rates that Missouri farmer Kip Cullers uses, one Clay County producer applied 3 lb of sugar per 10 gallons of water at V7-V8 on corn in 2010 and 2011.

(He purchased a pallet of cane or beet sugar from the local grocery store.) While Cullers tanked-mixed the sugar solution with a post-herbicide application like glyphosate, the Clay County producer opted not to. To simulate any effect from the water application or driving through the field, he drove through the untreated check spraying water only.

Two years of research results showed no significant increase in yield. However, there was a noticeable difference in standability at harvest. This producer did not apply a foliar fungicide either year. When it came to harvest, this producer needed the reel in 2010 for the untreated check. Stalk rot ratings were taken using the pinch test two weeks prior to harvest. To him, the $1.25/acre of sugar was worth it to improve standability, even if yield was not significantly improved. The full study can be viewed here.

Several York County producers also tested this with one producer finding a non-statistical 2 bu/ac yield difference with the check yielding better while the other producers found a statistically significant 2 bu/ac increase to the sugar treatment. Another producer in Hamilton County is testing this using the corn product he grows. He is using 1 quart of corn sugar (high fructose corn syrup) per 10 gallons of water applied at V7-V8.

In 2012, a small plot study was conducted at UNL's South Central Ag Lab near Clay Center to determine any differences between sugar application, fungicide application, and untreated check in corn. All treatments were applied at R2. Because of the drought in 2012, there was minimal disease pressure, thus there were no significant differences between the three treatments regarding area under the disease progress curve. The untreated check did show the most stalk rot (via the push lodging test). The sugar application reduced the lodging rating by half and the fungicide application showed the lowest lodging rating. For yield, there were no significant yield differences with the untreated check yielding the most, followed by the fungicide and sugar applications. The entire study report can be found here.

In soybeans we have had producers apply 3 lb of sugar in 10 gallons of water at R3 (beginning pod). In all years, there have been no significant differences in yield. Lodging ratings were not taken as that can be variety and water dependent.

Additional Research

Other research has shown that applying sugar to crops increases the numbers of beneficial insects in those fields. South Dakota research entomologists showed that lady beetles benefited from a combination of prey and non-prey foods. In a follow-up study, these entomologists applied sugar sprays to soybeans and quantified the frequency of sugar feeding by analyzing the gut contents of common lady beetles in three states. They found all the tested lady beetles regularly consumed sugar-like nectar in soybean fields, even when it wasn't applied as a supplement. They also found more lady beetles in the sugar treated plots compared to the untreated plots.

At this time we can't explain the stand ability effect we're seeing from our sugar applications to corn. Our hypothesis is that early application of sugar to corn is increasing beneficial microbes that may be keeping the exposed brace roots and stalks healthier. We hope to conduct more research in the future to answer this question.

Conclusion

The application of sugar to corn and soybeans has not always shown increased yield; however, in nearly all of the corn studies, sugar treated plots have shown increased stalk strength at harvest. Research has also shown an increase in the number of beneficial insects in fields where sugar was applied. Further research is needed to understand the interactions aiding stalk strength in corn.



3 comments:

  1. On a smaller scale, I've heard that putting sugar in the planting makes for sweeter tomatoes.

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  2. As I learn about Brix levels in plants and fruits, sugar definitely has an effect. It was interesting they most noticed standability improvement. I found HFCS to be a good adjuvant and first noticed it took the burn out of wheat when spraying 28% UAN as a topdress.

    Ed

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