From lab-scale plants it's clear that they are at least as resistant as the chinese chestnut the fungus is from. http://www.esf.edu/chestnut/resistance.htm htt

From lab-scale plants it's clear that they are at least as resistant as the chinese chestnut the fungus is from. http://www.esf.edu/chestnut/resistance.htm http://www.esf.edu/chestnut/resistance.htm Of course the proof is a forest of full grown trees, but there's every reason to expect this method will get us there.