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Ballistics of Mycosphaerella ligulicola Ascospore Discharge. R. E. McCoy, Assistant Professor, University of Florida, Agricultural Research Center, 3205 S. W. 70 Ave., Ft. Lauderdale, Florida 33314; Phytopathology 63:793-794. DOI: 10.1094/Phyto-63-793.

The mean horizontal distance of discharge of Mycosphaerella ligulicola ascospores was experimentally determined to be 3.1 mm. The maximum distance recorded was 6.2 mm. Initial velocities of discharge required to project M. ligulicola ascospores to these distances are calculated to be 21 and 50 m/sec, respectively. The calculated terminal velocity of these particles is determined to be 1.0 × 103 m/sec.

Additional keywords: Ascochyta chrysanthemi.