The American chestnut tree population from Maine to Alabama was wiped out in just fifty years. This disease reduced the American chestnut from its position as the dominant tree species in the eastern forest ecosystem to little more than an early-succession-stage shrub. These are plain old American chestnut trees without blight resistance. Blight Resistant American Chestnut Trees. Quick Guide to Chestnut Pests and Diseases but they have a good track record of eventually reducing damage to acceptable levels. If the United States Department of Agriculture (USDA) accepts the deregulation petition, the blight-tolerant chestnut would be the first GE tree approved for […] Chestnut heartwood is legendary for its rot resistance. There has been essentially no chestnut lumber sold in the U.S. for decades, and the bulk of the annual 20-million-pound nut crop now comes from introduced chestnut species or imported nuts. Chestnut tree with blight. At the time, the only known cure or remedy was to cut out the blight. This close-up shot of an American chestnut tree at House Rock Nature Preserve in Martic Township shows damage caused by an invasive fungus that nearly wiped out the native trees… These beneficial species spend the winter in shriveled galls, so it’s important to leave the previous season’s galls on the tree rather than prune them out. Lumber. Foresters were ordered to search forests and perform surgery on infected trees. But the spores of the fungus spread mercilessly by rain, wind, and wildlife. University researchers are seeking approval to restore the iconic chestnut to American forests by using a genetically engineered (GE) variety that can tolerate the blight that has killed billions of wild trees. Chestnut trees typically produce pollen before they are mature enough to produce chestnuts. In anticipation of the blight-resistant American chestnut trees, landowners are encouraged to establish “mother trees” on their properties. The American chestnut tree once dominated the landscape of the eastern U.S., from Mississippi to Maine. THE FUNGUS OF THE CHESTNUT-TREE BLIGHT, W. G. Farlow, Science 10 May 1912 35: 717-722; Three American tragedies: chestnut blight, butternut canker, and Dutch elm disease; Nutgrafting for American Chestnut Restoration; Utilization of Chestnut.

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