I maintain a garden which has a number of Acers in it. There are 12 A.griseum and there were 8 A.japonicas, but 3 have succumbed to Verticilleum Wilt this past year. Am I going to lose them all? Also, any suggestions for replacements? My client wants the red foliage, if possible. I am very careful about hygiene, sterilizing tools, etc.