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Filtering by: Creator Livingston, R. Ladd Decade 1970-1979

Potential Douglas-fir tussock moth damage in northern Idaho in 1974 based on a 1973 fall egg mass survey

Creator:

Tunnock, Scott and Livingston, R. Ladd

Abstract:

An epidemic of Douglas-fir tussock moth was detected in northern Idaho in 1972. In 1973, aerial surveys showed that nearly 100,000 acres contained various degrees of visible defoliation. An egg mass survey of five reporting units made in the fall of 1973 determined potential for damage in 1974. Based on...

Resource Type:

Technical Report
Impact of egg viability, egg parasitism, and virus on 1974 Douglas-fir tussock moth defoliation potential in northern Idaho

Creator:

Tunnock, Scott, Livingston, R. Ladd, Bousfield, Wayne E., and United States. Forest Service. Northern Region. State & Private Forestry

Resource Type:

Technical Report
Results of western hemlock looper egg survey

Creator:

Meyer, Hubert E., Livingston, R. Ladd, and United States. Forest Service. Northern Region. State & Private Forestry

Abstract:

The western hemlock looper, Lambdina fiscellaria Zugubrosa Hulst, caused, aerially visible defoliation on approximately 10,000 acres of State, private, and Federal forests of northern Idaho in 1972. This is the first report of noticeable defoliation by this insect in Region 1 since the late 1930's (Dewey et al. 1972).

Resource Type:

Technical Report