. Insect and disease conditions in the United States, 1979-83 : what else is growing in our forests?. Forest insects United States; Trees Diseases and pests United States; Plants Disease and pest resistance. Fusiform Rust Table 3. Slash and loblolly pine stands that have about 50 percent or more of the trees infected with fusiform rust on or within 12 inches of the main stem—1983 Landownership class National Other Total State Forest Federal State Private by State A f roc Alabama 11,180 J,ODD 3,ODD 319,800 337,712 Arkansas 1,018 156 78 Florida 12,077 7,296 5,791 244,631 269,795 Georgia 12,776 7
. Insect and disease conditions in the United States, 1979-83 : what else is growing in our forests?. Forest insects United States; Trees Diseases and pests United States; Plants Disease and pest resistance. Fusiform Rust Table 3. Slash and loblolly pine stands that have about 50 percent or more of the trees infected with fusiform rust on or within 12 inches of the main stem—1983 Landownership class National Other Total State Forest Federal State Private by State A f roc Alabama 11,180 J,ODD 3,ODD 319,800 337,712 Arkansas 1,018 156 78 Florida 12,077 7,296 5,791 244,631 269,795 Georgia 12,776 7,834 2,419 877,196 900,225 Louisiana 8,022 2,112 4,225 196,450 210,809 Mississippi 16,370 1,133 1,175 266,373 285,051 North Carolina 2,959 1,030 1,069 138,946 144,004 South Carolina 13,479 5,901 8,710 237,941 266,031 Texas 3,965 161 24 74,973 79,123 Virginia 0 0 0 2,416 2,416 Total 81,846 28,989 26,857 2,365,304 2,502,996 stem infection. At all levels of in- fection, private landowners have the majority of the affected acreage; State-owned lands are least affected. (The estimates in tables 1, 2, and 3 were derived primarily from Forest Inventory and Analysis data.) The corresponding maps (figs. 4 and 5) depict the levels of fusiform rust infection for loblolly and slash pines (Anderson and Mistretta 1982, Phelps and Czaba- tor 1978). These geographic esti- mates should be modified on site: specific areas within a zone may be different from the average for the area. Most managers define high-hazard areas as areas with 50 percent or more of the trees infected, but this decision will vary according to the land man- ager and the resource objective. Powers and others (1975) reported that about 109,894,000 cubic feet (3,112,200 m3) are lost each year throughout the South- east to fusiform rust. This volume represents a $28 million annual loss. When 1983 dollar prices are applied to that loss estimate, the annual loss comes to more than $100 million. In 1981, a new system for pre- d
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