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Snopes is a liberal site.

http://www.wheatbellyblog.com/2012/01/a-wheat-farmer-weighs-in-on-wheat-belly/

(From a wheat farmer)

And this...

“Charles Benbrook, Ph.D., who published the paper on the mounting use of glyphosate, says the practice of spraying glyphosate on wheat prior to harvest, known as desiccating, began in Scotland in the 1980s.

“Farmers there often had trouble getting wheat and barley to dry evenly so they can start harvesting. So they came up with the idea to kill the crop (with glyphosate) one to two weeks before harvest to accelerate the drying down of the grain,” he said.

The pre-harvest use of glyphosate allows farmers to harvest crops as much as two weeks earlier than they normally would, an advantage in northern, colder regions.

The practice spread to wheat-growing areas of North America such as the upper Midwestern U.S. and Canadian provinces such as Saskatchewan and Manitoba.

“Desiccation is done primarily in years where conditions are wet and the crop is slow to dry down,” Joel Ransom, an agronomist at North Dakota State University, said.

Ransom says desiccating wheat with glyphosate has been a useful tool for farmers.

“It does help hasten dry down and controls grain weeds and other material that slows down the threshing practice,” he said. “It has an important role in areas where it’s wet.”

Ransom says the practice has increased in North Dakota, which is the leading wheat-producing state in the U.S., over the past 15 years due to wetter weather.

While more common in Upper Midwestern states where there is more moisture, desiccation is less likely to be done in drier wheat growing areas of Kansas, Oklahoma, Washington and Oregon.

All Conventional Farmers in Saskatchewan Desiccate Wheat

According to a wheat farmer in Saskatchewan, desiccating wheat with glyphosate is commonplace in his region. “I think every non-organic farmer in Saskatchewan uses glyphosate on most of their wheat acres every year,” the farmer speaking on condition of anonymity said.

He has concerns about the practice. “I think farmers need to realize that all of the chemicals we use are ‘bad’ to some extent,” he said. “Monsanto has done such an effective job marketing glyphosate as ‘safe’ and ‘biodegradable’ that farmers here still believe this even though such claims are false.”

The vast majority of farmers in Manitoba, Canada’s third largest wheat producing province, also use glyphosate on wheat, said Gerald Wiebe, a farmer and agricultural consultant. “I would estimate that 90 to 95 percent of wheat acres in Manitoba are sprayed pre-harvest with glyphosate; the exception would be in dry areas of the province where moisture levels at harvest time are not an issue,” he said.

“Don’t Ask, Don’t Tell” Policy

According to Tom Ehrhardt, co-owner of Minnesota-based Albert Lea Seeds, sourcing grains not desiccated with glyphosate prior to harvest is a challenge.

“I have talked with millers of conventionally produced grain and they all agree it’s very difficult to source oats, wheat, flax and triticale, which have not been sprayed with glyphosate prior to harvest,” he said. “It’s a ‘don’t ask, don’t tell policy’ in the industry.”

Ehrhardt also says that crops grown to produce seed are not usually sprayed with glyphosate prior to harvest because this can damage seed germination.

Grain Millers, which has grain processing facilities in the U.S. and Canada, announced last year that it would not buy oats from Canada that had been desiccated with glyphosate. The company’s Canadian procurement manager, Terry Tyson, told Western Producer that glyphosate disrupts the natural maturing process and starch development, resulting in lower quality flakes and flour. He said the decision had nothing to do with health or safety concerns.

From ecowatch.com

More importantly, wheat is sprayed throughout the season.