Stability of benomyl homologues and their efficacy against sensitive and benomyl-resistant Botrytis cinerea.

Methyl, ethyl, and hexyl isocyanate homologues of benomyl (MBC-MIC, MBC-EIC, and MBC-HIC, respectively) were prepared and compared with benomyl (MBC-BIC). In water (pH 6.2), the half-lives of these compounds were 2.7-7.7 times greater at 178 μM than at 1.78 μM. They were less stable at 10 and 25 o C than at 1 o C. These compounds were tested for the protection of apples wound-inoculated with sensitive (S) and benomyl-resistant (R) isolates of Botrytis cinerea and stored at 1 and/or 20 o C