Control of the western pine shoot borer Eucosma sonomana Kearfott in selected ponderosa pine plantations in northern Idaho and western Montana

A synthetic pheromone of the western pine shoot borer, Eucosma sonomana Kearfott, has been used successfully as a 'mating disrupter in northern Idaho and western Montana since 1984. Infestation levels in treated ponderosa pine plantations declined from an average of 28 percent infested in 1983 to 5.5 percent by 1986. At the same time, infestation levels in the untreated check areas increased from an average of 24 percent to 30 percent from 1983 to 1986

Results of western hemlock looper egg survey

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)

Douglas-fir tussock moth adult male survey north Idaho and western Montana, 1982

Douglas-fir tussock moth populations are monitored annually in northern Idaho and western Montana to insure early detection of changes from endemic to outbreak population levels. Adult moth trapping in 1982 was intensified and expanded into additional areas from 1981 because of concern that with each passing year the probability of a tussock moth outbreak is more imminent. Annual increases in trap catches from 1980 through 1982 and reports during the summer of 1982 of defoliated yard and farmstead trees at various locations strongly suggest that populations are building. This report summarizes results of the 1982 adult population monitoring

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

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 new egg mass densities and new to old egg mass ratios, damage is predicted to be sufficiently high to warrant control on 34,138 acres in the Coeur d'Alene unit, 64,779 acres in the St. Joe unit, 4,433 acres in the Clearwater unit, 4,762 acres in the Craigmont unit, and 33,501 acres in the Nezperce unit. Total acres qualifying for treatment are 141,613. In addition, some damage might occur on 81,554 acres within the five units. These areas will be further evaluated to determine if they qualify for treatment

Pine Engraver, Ips pini (Say), in the Western United States

In the western United States, the pine engraver is a significant and frequent pest of ponderosa pine. In some localities it is also an important killer of lodgepole and Jeffrey pines and can be a serious pest in plantations of jack and red pines in the Midwest. In rare instances it may infest pinyon, Coulter, limber, sugar, western white, southwestern white pines, and probably most other pine species occurring within its range

An aerial test of orthene against the larch casebearer /

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