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Filtering by: Subject Defoliation -- Forecasting -- Montana Creator Hard, John S.

A demonstration for hazard rating susceptibility of stands to Douglas-fir tussock moth defoliation on the Palouse Ranger District, 1. Probability of defoliation

Creator:

Kessler, Bruce L., Heller, Robert C., and Hard, John S.

Abstract:

A practical demonstration of a method for rating forest stands as to their probability of defoliation by the Douglas-fir tussock moth using aerial photographs and available cruise data was done in the Palouse Ranger District, Clearwater National Forest, Idaho. A nonlinear computer program, RISK, was used to identify significant independent...

Resource Type:

Technical Report

Full Text:

DEMONSTRATION FOR HAZARD RATING SUSCEPTIBILITY OF STANDS TO DOUGLAS-FIR TUSSOCK MOTH DEFOLIATION ON THE PALOUSE
Western spruce budworm defoliation trend relative to weather in the Northern Region, 1969-1979

Creator:

Hard, John S., Tunnock, Scott, Eder, Robert G., and United States. Forest Service. Northern Region. State & Private Forestry

Abstract:

Western spruce budworm defoliated area in the Northern Region has differed significantly across three discrete geographic zones during the past decade. Aerially visible defoliation in northern Idaho increased from 1.7 million acres in 1969 to a high of 2.2 million acres in 1974, and declined to none in 1979. Defoliated...

Resource Type:

Technical Report

Full Text:

geographic zones but least so in western Montana. Defoliation trends based on questionable acreage figures