MSG used on crops grown in California
In May, 1999, spraying MSG on wine grapes (calling the spray a fertilizer) was approved by the California Department of Food and Agriculture (CDFA). Steven D. Wong, Branch Chief, Agricultural Commodities and Regulatory Services told us that there was no demonstration that use according to label directions would present a significant health hazard to workers, consumers of products grown with the aid of the MSG-containing product, or to the general public. To have a product approved for use as a fertilizer in California, a company need do little more than make application.
In April, 2000, and again in July, 2001, spraying MSG on wine grapes (calling it a fungicide) was approved by the California Department of Pesticide Regulation (CDPR). Barry Cortez, Branch Chief, CDPR, first told us that the CDPR would only turn down a product if it appeared to be ineffective, and AuxiGro didn't appear to be ineffective.
By 2009, unrestricted use of monosodium glutamate (called L-glutamate) and AuxiGro had been approved for use on all agricultural products.
In 2009, California registration of AuxiGro lapsed. In 2010, the CDPR registration of AuxiGro and glutamic acid were not renewed.