Abstract

Quantitative differences among strains ofCorynebacterium sepedonicum (Spieck. and Kotth.) Skapt. and Burkh. (=Clavibacter michiganense subsp.sepedonicum) were distinguished in eggplant (Solanum melongena L. ‘Black Beauty’) bioassays with a simple leaf axil inoculation technique. Latent period of infection (time from inoculation to first appearance of symptoms) varied inversely with inoculum dose. Latent period of infection varied significantly among strains ofC. sepedonicum. Symptoms developed more rapidly in plants grown under controlled conditions in a growth chamber than those grown in a greenhouse. Plants treated with inoculum prepared from broth cultures exhibited symptoms more rapidly than those treated with inoculum grown on agar.

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