. 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. Seed Orchard Pests Techniques and Timing as Flexible as the Pests Written by Julie Weatherby The forests we harvest today must be replaced to meet the projected resource needs of tomorrow. Tree planting is one way of replacing, or regenerating, forests. Planting genetically im- proved trees can boost wood pro- duction and quality, decrease rotation time, and reduce suscep- tibility to cert
. 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. Seed Orchard Pests Techniques and Timing as Flexible as the Pests Written by Julie Weatherby The forests we harvest today must be replaced to meet the projected resource needs of tomorrow. Tree planting is one way of replacing, or regenerating, forests. Planting genetically im- proved trees can boost wood pro- duction and quality, decrease rotation time, and reduce suscep- tibility to certain pests. These genetically improved trees are grown from seeds produced in seed orchards (fig. 1). The first seed orchards were established from parents that grew in natural stands. The parents were selected because they grew fast, had good form, and were relatively free from pest damage. The first operational pine seed orchards were established in the 1950's in the Southeast. By the late 1960's, seed orchards were being established throughout the major timber producing areas of the United States. As orchards matured and seed production increased, it became necessary to protect both the Figure 1. Location of major seed orchards in Location of major seed orchards. 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
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