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Control of Charcoal Root Rot with Methyl Bromide in Forest Nurseries

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Charcoal root rot. caused by the fungus Macrophomina phaseolina (Tassi) Gold. (Sclerotium bataticola Taub.) is the most serious disease of pine seedlings in Florida nurseries and produces significant losses throughout the South. All major southern pine species are susceptible. In 1976, there was increasing evidence that pine seedlings from nurseries heavily infested with charcoal rot presented a problem to landowners because of costs incurred in replacing diseased seedlings and from loss of potential production in establishing plantings. The disease is most effectively controlled by fumigation of nursery soils with a mixture of 67 percent methyl bromide and 33 percent chloropicrin at 350 lb/acre (392 kg/ha) under 2 mil polyethylene covers. Rotation with charcoal rot-resistant green manure cover crops such as millet or rye is also recommended.

Document Type: Journal Article

Affiliations: Nursery Disease Specialist, Forest Insect and Disease Management, Resource Protection, Southeastern Area, State and Private Forestry, USDA Forest Service, Asheville, North Carolina

Publication date: August 1, 1979

More about this publication?
  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Southern Journal of Applied Forestry covers an area from Virginia and Kentucky south to as far west as Oklahoma and east Texas.
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