We've been around this issue before (in fact, I once complained that Benomyl
just didn't fix a lot of my problems). However, I have used it quite
successfully of late, including saving a S. alata and several S. psittacina
from powdery mildew (Botrytis). And dipped into the wettable powder (dry), a
P. moranensis hybrid even survived the creeping root rot mine sometimes get
during their winter dormancy (where the roots slime up and disappear,
followed by the central crown of the plant, then rest of it).
Jay Lechtman
L235@aol.com