| pseudomonas cichorii as the causal agent of midrib rot, an emerging disease of greenhouse-grown butterhead lettuce in flanders. | bacterial midrib rot of greenhouse-grown butterhead lettuce (lactuca sativa l. var. capitata) is an emerging disease in flanders (belgium) and fluorescent pseudomonads are suspected to play an important role in the disease. isolations from infected lettuces, collected from 14 commercial greenhouses in flanders, yielded 149 isolates that were characterized polyphasically, which included morphological characteristics, pigmentation, pathogenicity tests by both injection and spraying of lettuce, lop ... | 2009 | 19157742 |