High level of resistance to G. michiganense.

Varying degrees of resistance to bacterial canker in the tomato have been noted: L. pimpinellifolium and L. hirsutum (Elenkov, 1965; Hassan, 1968) ; L. peruvianum var. humifusum (Sotirova, 1976) ; and L. chilense (Yordanov, Stamova, 1977) . The highest level of resistance reported occurs in the line Okitsu Sozai I-20 with L. hirsutum in the pedigree (Laterrot, 1979).

After testing different breeding lines in "Maritza" Vegetable Crops Research Institute, we found high levels of resistance to C. michiganense in CORINA, a line with L. pimpinellifolium and L. racemigerum in its pedigree. Evaluation after stem inoculation (with the strong strain No. 7) using a scale from 0 to 4, is given in Table 1.

Table 1.  Distribution of the plants in percent by grade of the
          total number of plants.
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                                       Grades
                     ______________________________________
                         0      1      2      3      4
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Corina                  64     29      7     --      --
Okitsu Sozai I-20       35     65     --     --      --
Manalucie               --     21     36     22      21
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     0 - no symptoms, I - some leaflets wilted, 2 - whole leaf
     wilted, 3 - some leaves wilted, 4 - the whole plant wilted.