. 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 63. Figure 7. Testing the resistance of loblolly pine seed- lings to fusiform rust infection at the Resistance Screening Center. F-705656 turn (Powers and others 1979). Many of these genetic selections are being made at the Resistance Screening Center, located in Asheville, NC. For 10 years, the center has selected genetically rust-resistant plant material for tree breeders.
. 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 63. Figure 7. Testing the resistance of loblolly pine seed- lings to fusiform rust infection at the Resistance Screening Center. F-705656 turn (Powers and others 1979). Many of these genetic selections are being made at the Resistance Screening Center, located in Asheville, NC. For 10 years, the center has selected genetically rust-resistant plant material for tree breeders. Each year, it screens between 500 to 1,000 seedlots to determine their relative resistance to fusiform rust (fig. 7). Tree improvement special- ists use these data to select trees to place in their breeding pro- grams, remove trees from or- chards, and plant seedlings that are less susceptible to fusiform rust. One advantage is the rela- tively quick service the center can provide. Testing at the center takes about 1 year; field testing— where the fungus cannot be moni- tored or controlled—takes 5 years. Because of its effects on the southern pine resource, fusiform rust is the most important forest disease of the Southeast. It will probably always be a serious management problem. But it is a problem that, in time, may be brought under control (Dinus and Schmidt 1977).. 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 Loomis, Robert C; Tucker, Susan; Hofacker, Thomas H; United States. State and Private Forestry; United States. Forest Pest Management. [Washington, D. C. ] : The Service
Size: 1895px × 1319px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
