by Department of Agriculture, Forest Service, Intermountain Region in Ogden, Utah .
Written in English
|Statement||by Lawrence E. Stipe ... [et al.].|
|Contributions||Stipe, Lawrence E., Boise Cascade Corporation., Idaho. Dept. of Lands.|
|The Physical Object|
|Pagination||xi, 34, 23 p. :|
|Number of Pages||34|
The Resource A pilot project with Orthene for control of the western spruce budworm, McCall, Idaho, , by Lawrence E. Stipe [and others]. A pilot project with Orthene for control of the western spruce budworm, McCall, Idaho, / by Lawrence E. Stipe [et al.]. By United States. Forest Service. Intermountain Region. Abstract. xi, . The Western Spruce Budworm Model: Structure and Content. January ; In , the United States the latter authors fo und th at air temperatures (which control. An illustration of an open book. Books. An illustration of two cells of a film strip. Video An illustration of an audio speaker. Status of western spruce budworm populations following the Cascade, Idaho control project Item Preview remove-circle.
Figure 3.—Egg mass of the western spruce budworm laid on Douglas-fir needle. Figure 4.— Fourth-stage western spruce budworm larva feeding on Douglas-fir needles. Figure 5.— Female pupa of the western spruce budworm spun among dead needles and larval frass and webbing. Life History Throughout most of its range, the western spruce budworm. Western Spruce Budworm Description Western spruce budworm is the most widely distributed forest defoliator in western North America. Here in the West, there can be severe infestations in healthy Douglas ﬁ r, white ﬁ r, and spruce. Life Cycle The western spruce budworm completes one cycle of development from egg to adult annually. 1. In , western spruce budworm larval populations were higher on all treated grand fir than on control trees, where populations had decreased (Table I). Defoliation of new shoots on grand fir treated in and again in was significantly (P. A OR 9 A Pilot Project with Orthene for Control of the Western Spruce Budworm, McCall Idaho 1 A OT 8/10 Environmental Assessment for the Use of Motorized Watercraft in the Sylvania Wilderness 1 A OZ 1 For the Trees, An Illustrated History of the Ozark-St Francis National Forests 1 A P 12/2 How Well are You.
Entomology Hall Lincoln, NE [email protected] Above a point in the -plane where this surface folds over itself, there are multiple l inspection of this surface shows there are regions in the -plane where only one equlibrium solution exists, and regions where there are clearly three equilibrium y along the leading edge of a fold in the surface, there will be just two equilibrium solutions. Get this from a library! Efficacy of Orthene for spruce budworm control in Maine, [John B Dimond; United States. Forest Service.; Life Sciences and Agriculture Experiment Station.]. Western Spruce Budworm Figure 1. Tree mortality from western spruce budworm in Grand County. Photo: Matt Schiltz, CSFS About Western Spruce Budworm Western spruce budworm (Choristoneura freemani) feeds upon and defoliates Douglas-fir, true fir (e.g., subalpine fir and white fir) and spruce trees. Damage is caused by larvae feeding on the.