DCNA-Benomyl Multiple Tolerance in Strains ofBotrytis cinerea

Publisher Website
Google Scholar
Abstract
DCNA (2,6-dichloro-4-nitroaniline)-benomyl multiple-tolerant strains of B cinerea were obtained by plating conidia derived from benomyl-tolerant isolates of B. cinerea onto potato-dextrose agar (PDA) plates amended with 100 .mu.g of DCNA/ml. Colonies of the DCNA-benomyl multiple-tolerant strains grown on PDA were symmetrical with unusually tough mycelial mats. Growth rats of these multiple-tolerant strains on PDA were about half that of the benomyl-tolerant isolates. The ED50 for reduction of mycelial growth as measured by colony diameter ranged 0.8-1.4 mg of DCNA/ml for the isolates tolerant to benomyl only but was 3.9-88.8 .mu.g decayed DCNA or DCNA plus benomyl-treated peach fruit. Multiple-tolerant strains were pathogenic on tomato stems, but the lengths of stem colonized were less than that of the parent benomyl-tolerant strains.

This publication has 1 reference indexed in Scilit: