The pine butterfly, Neophasia menapia (Felder and Felder), infestation on the Nezperce National Forest was aerially surveyed in mid-August 1972.
A followup ground evaluation was made in September. Results of the survey
show the infestation has increased substantially in intensity and size.
The infestation was first reported in 1971 when...
A 3-year evaluation of Douglas-fir cones in Montana and Yellowstone National Park, Wyoming, showed the western spruce budworm, Choristoneura occidentalis Freeman, and midges were the most common and injurious insects found each year. Injury was so severe at some plots that no sound seeds could be found.
The bark beetle infestation in ponderosa pines defoliated by pine looper, Phaeoura mexicanaria (Grote) on Cook Mountain was resurveyed in 1971. Most of the surviving defoliated trees have "greened up" appreciably. Bark beetle activity was greatly reduced. The red turpentine beetle, Dendroctonus vaZens LeConte, was the only bark beetle observed...
Over 10,000 acres of aerially visible western hemlock looper defoliation on grand fir was detected on State and Federal forests of central Idaho in 1972. This is the first report of this insect building up
in Region 1 since a widespread outbreak in 1937-39.
The western hemlock looper has the...
The pine butterfly, Neophasia menapia (Felder and Felder), currently is epidemic on approximately 40,000 acres of State, private, and National Forest land in the Bitter Root Valley. Butterfly populations were reported as becoming epidemic in 1969 and have continually increased to the present level (Bousfield and Dewey 1972).
Because this...
The current western spruce budworm, Choristoneura occidentalis Freeman, outbreak on the Clearwater National Forest was first detected in 1966. Since then, the infestation has increased to epidemic proportions with over 500,000 acres of State, Federal, and private forest land visibly defoliated. In addition, incipient budworm populations are present throughout much...
A western false hemlock looper, Neptyia freeman Munroe, outbreak was detected in the late summer of 1973 at the north end of Flathead Lake. Defoliation, from barely detectable to heavy (most foliage removed from upper half of trees), occurred on Douglas-fir over about 3,000 acres
located between Somers and Kalispell,...
Aerial application of mexacarbate and Bacillus thuringiensis Berliner was tested against pine butterfly, Neophasia menapia (F. and F.). These were applied to 40-acre plots on the Bitterroot National Forest and adjacent State and private lands during June 1973. Two concentrations of each material were tested; these were 0.15 and 0.30...