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Management Strategies for Reducing Losses Caused by Fusiform Rust, Annosus
Root Rot, and Littleleaf Disease
Robert L. Anderson - Supervisory Pathologist, USDA Forest Service, Southeastern Area, State and Private Forestry, Forest Pest Management, Ashville, N.C., and
Paul A. Mistretta - Supervisory Pathologist, USDA Forest Service, Southeastern Area, State and Private Forestry, Forest Pest Management, Pineville, La.
United States Department of Agriculture, Forest Service, Cooperative State Research Service, Agriculture Handbook No. 597, October 1982.
Littleleaf Disease Management Practices
All Other Areas
| Management Practices |
Littleaf Disease |
E. Use seeds or seedlings that are
resistant or less susceptible to
disease. |
Avoid planting littleleaf-susceptible pines on sites with a previous history of littleleaf disease or on high-hazard sites for the disease (Table 2). These sites should be regenerated with seed or seedlings from:
- Loblolly seed orchards, or
- Nonhost species, such as hardwoods.
|
| F. Consider altering planting density. |
The planting strategy to reduce the incidence of littleleaf requires increased spacing of seedlings to delay thinning and reduce root competition. |
| G. Modify fertilization practices. |
In high-value stands showing early symptoms of disease, fertilize with up to 250 pounds of inorganic nitrogen per acre (39.5 kg/ha). |
K. Remove the most severely affected
trees during thinning operations when
the residual stand will be adequately
stocked. |
In adequately stocked stands (with basal area of at least 60 ft²/ac (14 m²/ha)) with low levels of litteleaf-affected trees (less than 25 percent of trees symptomatic), remove all obviously infected trees. If thinning will reduce the basal area below 30 ft² per acre (7 m²/ha), see management option N.
In adequately stocked stands with more than 25 percent of the stems affected, consider regeneration (management option N). |
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