. 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. Figure 7. Lodge- pole pine stand severely infested with lodgepole pine dwarf mistle- toe is being replaced by means of prescribed fire; Colorado. 3 9mp^M would probably not replace proper silvicultural management of forest stands. Research continues into techni- ques for quantifying the effects of dwarf mistletoes, including rates of spread and intensification in managed stands. Growth and
. 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. Figure 7. Lodge- pole pine stand severely infested with lodgepole pine dwarf mistle- toe is being replaced by means of prescribed fire; Colorado. 3 9mp^M would probably not replace proper silvicultural management of forest stands. Research continues into techni- ques for quantifying the effects of dwarf mistletoes, including rates of spread and intensification in managed stands. Growth and yield models need to be devel- oped for other forest ecosystems. Extension and training programs could be improved. In addition, dwarf mistletoe control should continue to be integrated into forest plans and harvesting operations. Where the disease is present, for example, timber cutting contracts should contain clauses pertaining to the felling of infected, nonmer- chantable trees. And the present demands for fuelwood mean that we can now harvest many small- diameter, highly defective stands F-705652 that were previously left un- treated. As these stands are harvested, they will be replaced by disease-free stands. The mistletoes are widespread, but in intensively managed stands, foresters are making good progress toward reducing their effects. Still, the dwarf mistletoes will continue to cause tremendous losses each year for many years to Figure 8. Combina- tion of cultural treatments in Colorado: severely infested lodgepole pine in the fore- ground has been clearcut; the stand in the background has been sanita- tion 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 Mana
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