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 - AR Hazard

Description

AR Hazard is based upon a discriminant analysis of tree, site, and stand characteristics from southern and central Arkansas. The system is easily applied and uses readily obtained inventory data.

Inputs

1) Radial growth in last 10 years (inches to nearest tenth)
2) Stand age (years)
3) Hardwood basal area, or BA (square feet per acre)
4) Total stand basal area (square feet per acre)

Hazard estimates may be developed by entering the above input data into the following equation:

Hazard Score =

64.3 (radial growth) + 3.3 (stand age)
+ 0.93 (hardwood BA)
-1.5 (total BA)

Outputs

A Hazard rating class is determined from the Hazard score as follows:

	Score	Hazard class
	>100	Low
	1-100	Medium
	<1	High

General Reference

Ku, Sweeney, and Shelburne 1981.

For additional information, contact

Staff Entomologist
USDA Forest Service--Southern Region
Forest Pest Management
1720 Peachtree Road, N.W.
Atlanta, GA 30367
Telephone: (404) 881-2961

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Developed by the University of Georgia Bugwood Network in cooperation with USDA Forest Service - Forest Health Protection, USDA APHIS PPQ, Georgia Forestry Commission, Texas Forest Service
and the Pests and Diseases Image Library - Australia

Last updated on Wednesday, August 09, 2006 at 12:49 PM
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