. Recent research on conifer needle diseases : conference proceedings, October 14-18, 1984, Gulfport, Mississippi. Conifers Diseases and pests Congresses. DISTANCE (m) DISTANCE ( m ) Figure 4.—Maximum percent brown spot needle dieback (YMAX) by distance from initial infection focus for resistant (R), susceptible (S), mixed family (R+S), and control (C) plantings of longleaf pine after two growing seasons in Mississippi (MS) and Georgia (GA).. DISTANCE (m) DISTANCE (m) Figure 5.—Time (wk) of beginning brown spot needle dieback (TBE
. Recent research on conifer needle diseases : conference proceedings, October 14-18, 1984, Gulfport, Mississippi. Conifers Diseases and pests Congresses. DISTANCE (m) DISTANCE ( m ) Figure 4.—Maximum percent brown spot needle dieback (YMAX) by distance from initial infection focus for resistant (R), susceptible (S), mixed family (R+S), and control (C) plantings of longleaf pine after two growing seasons in Mississippi (MS) and Georgia (GA).. DISTANCE (m) DISTANCE (m) Figure 5.—Time (wk) of beginning brown spot needle dieback (TBEG) by distance (m) from initial infection focus for resistant (R), susceptible (S), mixed family (R+S), and control (C), plantings of longleaf pine in Mississippi (MS) and Georgia (GA). resistant families consistently had smaller YRATE values. Family mixtures did not reduce the YRATE when compared to the susceptible families. In fact, the family mixtures had greater YRATE values. Over all families, YRATE decreased as distance from initial infection focus increased. DISCUSSION Even though the quantity and quality of initial inoculum was similar, BSNB severity levels were much higher in Georgia than in Mississippi. 8. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Peterson, Glenn W; International Union of Forestry Research Organizations. Working Party on Needle Diseases. Washington, D. C. : U. S. Dept. of Agriculture, Forest Service
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