Department of Plant Pathology, Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana-141004
*E-mail: mandeep.hunjan@pau.edu
Online published on 24 February, 2016.
Maize growing areas of Punjab surveyed during Kharif 2014 revealed that bacterial leaf streak disease was limited to Ludhiana and Hoshiarpur districts. A total of twenty five isolates were collected, isolated and identified as yellow slimy colonies appearing on king's B medium. These isolates showed variation in virulence when tested on maize cultivar G-5414 and were classified as highly virulent, moderately virulent and less virulent. A panel of 25 biochemical tests were used to characterize these isolates which showed differential reaction for carbohydrates utilization, gelatin liquification and citrate utilization. Multiple antibiotic resistance was observed in majority of the isolates tested. numerical analysis of the phenotypic features revealed four distinct groups of Acidovorax avenae subsp. avenae isolates.
Acidovorax avenae subsp. avenae, bacterial leaf streak, diversity, maize
