American Chestnut trees infected with blight in locations in Wales, MA, and Belchertown MA were treated with 2 biological agents ( OMRI Listed ) early this spring before the Leaf out stage.
The agents are Trichoderma Harizium and special strain of Bacillus subtillis.
The good news is that that blight appears to halted, and the trees are producing a good crop of chestnuts.
They appear to be bigger than last years.However the squirrels are harvesting them so an accurate quantity count is not possible.
Whether a full recovery of the trees is possible,...time will tell.
Discussions with Dr. Terry Tattar, and the literature search of the biological agents distributor indicates that these bio-controls are useful in curbing many of the fungal diseases that affects food crops(tomato and potato Blights, cerearl grain rusts, etc.), and trees blights ( sudden oak death, dutch elm disease, cytospora canker,
blue stain, etc. ). Blue stain is a mold/fungus that is transmitted by the Asian long horn beetle that has been killing our maple trees.
It is interesting to note: that the Trichoderma fungus also seems to function similar to Arbuscular Mycorhizal fungi ( AMF ) in breaking down rocks and clay a making needed micronutrients available to the host plant.
These positive results indicates that further study should be done to help farmers, forester and gardeners
in growing better crops.