2 Miss. Code. R. 1-3-01-129.01
In order to prevent further introduction and dissemination within Mississippi of Pecan Bunch Disease, the Bureau of Plant Industry, Mississippi Department of Agriculture and Commerce, under provisions of Miss. Code Ann. §§ 69-25-7, 69-25-15, 69-25-17, 69-25-19, 69-25-23, 69-25-25 and 69-25-35, does declare and give public notice hereof that pecan nurseries shall be isolated from bunch disease pecan, hickory and black walnut trees, by a distance of one-half mile and there shall be no record of bunch disease having occurred in the nursery area for a period of at least three years. Owing to the fact that black walnut is known to be a symptomless carrier of bunch disease, no black walnut trees shall be propagated in pecan nurseries.
2 Miss. Code. R. 1-3-01-129.01