Brown-Spot Resistance in Natural Stands of Longleaf Pine Seedling

摘要

An average of 10 percent of longleaf pine (Pinus palustris) seedlings in several natural populations remained nearly free of brown-spot needle blight (Scirrhia acicola) year after year, despite high infection levels in the population as a whole. In one study, these individuals averaged 8 feet taller at age 24 than surviving trees that were less resistant to the disease.