RNGR.net is sponsored by the USDA Forest Service and Southern Regional Extension Forestry and is a colloborative effort between these two agencies.

U.S. Department of Agriculture USDA Forest Service Southern Regional Extension Forestry Southern Regional Extension Forestry

Skip to content. | Skip to navigation

Home → Publications → Tree Improvement and Genetics → Southern Forest Tree Improvement Conference → 17th Southern Forest Tree Improvement Conference (1983) → Increase And Spread Of Brown Spot Needle Blight Within Single And Multiple Family Plantings Of Open-pollinated Longleaf Pine

Increase And Spread Of Brown Spot Needle Blight Within Single And Multiple Family Plantings Of Open-pollinated Longleaf Pine

Longleaf pine (Pinus palustris Mill.) plantings were established in south Mississippi and southwest Georgia to study the increase in time and space of brown spot needle blight, caused by Scirrhia acicola (Dearn.) Siggers. Open-pollinated families with varying degrees of resistance to brown spot were I planted in single- and multiple-family plots. Epidemics were initiated by placing severely infected longleaf pine needles on susceptible longleaf source plants in the center of the plots. Disease was measured at 6-week intervals for two growing seasons. Disease progress curves were constructed from these measurements.


Download this file:

PDF document Download this file — PDF document, 56Kb

Details

Author(s): Margene M. Griggs

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1983