Could someone recognize the disease in these peach tree roots? The smell is hard to describe but it's definitely not pleasing.
My best guess is that you have yourself a case of white root rot disease or maybe Armillaria root rot. Armillaria has a funky smell something like mushrooms. Either way, there is no cure and the treatment is to quarantine and destroy the effect entity. After you have disposed of the infected plant be sure to disinfect all your tools and any containers you plan to reuse with alcohol in order to prevent the spread of the disease.