Field spray applications in 1961 on peach and apricot indicated lasting residual activity of DCNA under the California environment of high temperature with no rain, and high activity of residual DCNA against Rhizopus stolonifer with 1 and with 0.5 pound of DCNA in 100 gallons of water. Some activity against R. stolonifer was observed with 1 pound of captan and of folpet. DCNA activity was comparable with that of captan and folpet on Monilinia fructicola on peach and apricot, but not on apricots that showed little to no DCNA residue after seven days.
