Tomato seedling inoculations with Corynebacterium michiganense
1970
Strider, D.L.
Root and stem inoculations of tomato seedlings were compared. the root inoculation methods failed to produce uniform infection and were therefore judged undesirable. inoculum levels of about 109 cells were required to obtain 70-85% infected plants via roots. almost no plants became infected with an inoculum level of 106 cells/plant placed around roots. slightly more plants became infected if roots were cut after pulling from the seedbed than if left uncut. disease development was rapid and uniform in plants that were stem-inoculated at 14 days of age. fourteen days after inoculation, some foliage on most plants was wilted even in plants stem-inoculated with only 9 cells. disease development was slower in plants inoculated at 28 days of age. age of inoculum did not influence disease development.
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