TOPDRESSING SAND PARTICLE SHAPE AND INCORPORATION EFFECTS ON ANTHRACNOSE SEVERITY OF AN ANNUAL BLUEGRASS PUTTING GREEN
Sand topdressing is a common practice on putting green turf and has been suspected to enhance anthracnose disease caused by the fungus Colletotrichum cereale sensu lato Crouch,Clarke,and Hillman.A field trial was conducted to evaluate topdressing incorporation method (none,vibratory rolling,soft bristled brush and stiff bristled brush) and sand shape (none,round and sub-angular) effects on anthracnose severity of a Poa annua L.f.reptans (Hausskn) T.Koyama turf in 2006 and 2007.The trial was conducted as a split-plot design arranged in a 4 x 3 factorial with incorporation method as the main plot factor and sand shape as the subplot factor on a P.annua turf mowed at 3.2 mm.Topdressing was applied at 0.3 L m-2 every 14 d from 27 June to 13 Sept.2006 and 14 May to 27 Sept.2007.Sand shape was the only significant source of variation in both years.None of the topdressing incorporation methods affected anthracnose severity.Both sand shapes initially increased disease severity 4 to 14% compared to non-topdressed turf in July 2006; however,continued topdressing with sub-angular and round sand reduced anthracnose 8 to 29% and 7 to 29%,respectively,during August and September of 2006 and 2007 compared to the non-sand treatment.Anthracnose was less severe in plots topdressed with sub-angular sand than round sand in July 2006 and July through September 2007.This trial supports the findings of previous topdressing and verticutting trials which indicate that subtle wounding or bruising associated with routine cultural practices is not a significant factor affecting anthracnose severity.
cultural practices thatch wounding
John C. Inguagiato James A. Murphy Bruce B. Clarke
Dept. of Plant Science and Landscape Architecture,Univ. of Connecticut,Storrs,CT,06269 USA Dept. of PlantBiology and Pathology,Rutgers,the State Univ. of NewJersey,New Brunswick,NJ 08901 USA
国际会议
The 12th International Turfgrass Research Conference(第十二届国际草坪学术大会)
北京
英文
127-133
2013-07-14（万方平台首次上网日期，不代表论文的发表时间）