Rating the Susceptibility of Stands to Southern Pine Beetle Attack

G.N. Mason - Research Coordinator, IPM RD&A Program for Bark Beetles of Southern Pines,
P.L. Lorio, Jr. - Project Leader and Supervisory Soil Scientist, Forest Insect Research, USDA Forest Service, Southern Forest Experiment Station, Pinesville, LA,
R.P. Belanger - Principal Silviculturist, USDA Forest Service, Southeastern Forest Experiment Station, Athens, GA, and
W.A. Nettleton - Entomologist, Forest Pest Management, USDA Forest Service, Southern Region, State and Private Forestry, Pineville, LA.

Integrated Pest Management Handbook, USDA, Forest Service, Agriculture Handbook No. 645, April 1985.

Model Summaries - NF Risk

Description	NF Risk is a subjective rating system based on readily available resource data from five data fields in the Continuous Inventory of Stand Conditions (CISC), an automatic data processing system that continually reflects an up-to-date description of timer stands. CISC is used on all National Forests in the South. The model applies specifically to the Kisatchie National Forest in Louisiana and, with some modifications, to National Forests in Texas, Mississippi, Arkansas, probably to Alabama and Georgia, and possibly to other southern National Forests. It provides the forest manager with an additional criterion for selecting stands to thin or regenerate when planning for a 5- to 10-year cutting cycle. The basic principles of the system apply anywhere the SPB may be a significant problem. NF Risk is being validated on the Kisatchie National Forest and has been applied to all Mississippi Forests and to some Texas National Forests.
Inputs	Required 1) Forest type 2) Stand condition class 3) Method of cut 4) Operability 5) Site index
Outputs	Normal Computer printouts are generated that list Risk-rated stands by high, medium, or low groupings. Information is added to the CISC data file, and subsequent printouts of CISC data include the Risk rating for each stand in the compartment. Risk-rating information is revised continually as is done for basic stand data. Optional At any time, printouts may be obtained that will give a listing of stands by Risk classes, their location, and the number of acres included in each Risk-rating category.
Accessibility	A computer program for application of the stand Risk-rating system is online with the Ft. Collins computer center.
General Reference	Three publications cover the philosophy and development of the model and details of its use and application: Lorio 1978. Lorio and Sommers 1981. Lorio, Mason, and Autry 1982.
For additional information, contact	Dr. Peter L. Lorio, Jr. USDA Forest Service Southern Forest Experiment Station Forest Insect Research 2500 Shreveport Highway Pineville, LA 71360 Telephone: (318) 473-7232

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