1 edition of Western spruce budworm egg mass-defoliation surveys found in the catalog.
by USDA, Forest Service, Forest Insect and Disease Management, Methods Application Group in Davis, Calif
Written in English
|Statement||compiled by David G. Grimble and Robert W. Young|
|Series||Report -- no. 77-3, Report (United States. Forest Insect and Disease Management. Methods Application Group) -- no. 77-3.|
|Contributions||United States. Forest Insect and Disease Management. Methods Application Group|
|The Physical Object|
|Pagination||21 leaves ;|
|Number of Pages||21|
Sampling Methods Forest Health Technology Enterprise Team TECHNOLOGY TRANSFER Sampling Methods for Forest and Shade Tree Insects of North America Volume 1 Christopher J. . Effects of a Western Spruce Budworm Outbreak on Private Lands in Eastern Oregon, • David L. Azuma and David L. Overhulser Forest Inventory and Analysis data from three inventory periods were used to examine the effects of a western spruce budworm outbreak on .
An illustration of an open book. Books. An illustration of two cells of a film strip. Video. An illustration of an audio speaker. Audio. An illustration of a " floppy disk. Status of western spruce budworm populations following the Cascade, Idaho control project Item Preview. Life History of the Spruce Budworm The spruce budworm has four life stages: egg, larva, pupa, and adult. The adult stage is a moth with a wingspan of about three-quarters of an inch sixth(2 cm). The female moths lay their eggs in masses on needles of host trees in mid-July to early August. The number of eggs per mass varies considerably but.
Locating western spruce budworm egg masses with ultraviolet light / By R. E. Acciavatti, Daniel T. Jennings and Colo.) Rocky Mountain Forest and Range Experiment Station (Fort Collins. Abstract. Bibliography: p. of access: Internet Topics: Spruce budworm. Field sampling was carried out during the initial years of a spruce budworm outbreak near Amqui, Québec. Annual aerial surveys of spruce budworm defoliation conducted by the Québec provincial government indicated that defoliation was first detected in the study area in (Ministère des Forêts de la Faune et des Parcs, ).We established 27 ha circular plots representing a .
How to teach the rhythm band
The faithful friends.
Geoenvironment an Introduction
doctrine of the person of Jesus Christ
The three wishes.
comparison of three serum cholinesterase methods
intellectual struggle of the English Papists in the seventeenth century
Support document, health effects test rule
The designs for the new palace of justice critically considered
Region of Sudbury
Leading Europe into the 1990s
Prospects for improving U.S. patent quality via post-grant opposition
review of the techniques used in the petroleum industry to remove oil and suspended solids from waste streams
Dark Blue Bike at No. 17
treasure of vowed chastity in secular persons, 1621
Western spruce budworm is the most widely distributed forest defoliator in western North America. Budworms have a one-year life cycle and are actually a small moth at full maturity. Here in the West, there can be severe infestations in healthy Douglas-fir, white fir and spruce.
Get this from a library. Distribution of western spruce budworm egg masses on white fir and Douglas-fir. [J M Schmid; P A Farrar; Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.); United States. Department of Agriculture.]. Get this from a library. Western spruce budworm egg mass dimensions: an influence on population estimates.
[Richard Irvin Washburn; James E Brickell; United States. Department of Agriculture.; Intermountain Forest and Range Experiment Station (Ogden, Utah)]. Sequential plan for western budworm egg mass surveys in the central and southern Rocky Mountains. Fort Collins, Colo.: Rocky Mountain Forest and Range.
The clearest epidemiological pattern was the increase in the rate of mortality caused by ChocNPV observed at the greatest local densities of western spruce budworm ().Nonetheless, population densities must be very high (> budworm per kg foliage or approximately 30 budworm per cm branch tip) for the likelihood of ChocNPV mortality to reliably exceed even 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 Western spruce budworm egg mass-defoliation surveys book budworm.
Presents a sequential plan for sampling populations of Choristoneura occidentalis on Pseudotsuga menziesii in the central and southern Rocky Mts. Numbers of new egg masses per in.
branch are used to classify infestations in 4 classes corresponding to the degrees of defoliation to be expected in the next season.
The use of the sequential plan and its operational efficiency are discussed. Egg recruitment quantifies the relative importance of realized fecundity and migration rates in the population dynamics of highly mobile insects.
We develop here a formal context upon which to base the measurement and interpretation of egg recruitment in population dynamics of eastern and western spruce budworms, two geographically separated species that share a very similar ecology. The last major spruce budworm outbreak defoliated over 58 million hectares in the s–s, and caused 32–43 million m 3 /year of timber volume losses from toin Canada.
Management to deal with spruce budworm outbreaks has emphasized forest protection, spraying registered insecticides to prevent defoliation and keep trees alive.
Western Spruce Budworm Defoliation By Zainal A Majeed This thesis is an evaluation of the possibility of using NOAA Advanced Very High Resolution Radiometer (AVHRR) satellite imagery to map.
Spruce budworm (SBW) probability of occurrence (L2–L6) in and for the Quebec study area, based on the BioSIM simulation: L2 and L6 are the second and sixth instar in the lifecycle of. The ecology and control of Choristoneura occidentalis Freeman in forests in the northern Rocky Mts.
in the USA and Canada are reviewed with particular reference to the successful adaptation by this pest to the coniferous forest ecosystem, its effects on regeneration establishment and development, the short-term success of past large-scale insecticidal spraying programmes, and the future.
Time-lapse movie of an egg cluster of Choristoneura occidentalis at the start of egg hatch. Skip navigation Spruce Budworm - Duration: The University of Maine 2, views. 99 SUPPORTING DECISIONS ON WESTERN SPRUCE BUDWORM IN FOREST MANAGEMENT USING SIMULATION MODELS* 2 J.
Colbert, Katharine Sheehan3, and Nicholas L. Crookston4 AbstractA system of computer models is being developed to assist forest managers and planners in making decisions about western spruce budworm, an important defoliator of western. The data included in this analysis came from studies that measured egg and adult densities, allowing estimation of the per capita rate of egg recruitment or apparent fecundity.
The conventional sample unit for spruce budworm life stages is a cm branch tip removed from the mid-crown of host trees . 1. Introduction. Defoliation by spruce budworm, Choristoneura fumiferana (Clem.), has caused substantial loss to merchantable timber in eastern Canada and the United States (MacLean, ), and is considered the most widely distributed and destructive defoliator of spruce–fir (Picea spp.–Abies spp.) forests in North America.
The spruce budworm is associated primarily with the. 1 Western spruce budworm Choristoneura occidentalis Free. larvae emerge in the spring before buds have expanded and spend a variable period of time foraging on branches and mining needles. Western Blackheaded Budworm, Acleris gloverana (Walsingham) Egg survey, hot water extraction technique.
Larval survey, 3-tree sampling Egg survey with known precision, hot water extraction technique, damage. Print book: National government publication: EnglishView all editions and formats: Rating: (not yet rated) 0 with reviews - Be the first.
Subjects: Western spruce budworm -- Great Lakes Region (North America) Western spruce budworm. Great Lakes Region.
View all subjects; More like this: Similar Items. • Conduct surveys • Identify infestations morphosis: egg, nymph (immature stage), and adult. It’s the larvae or nymphs that most often western larch western spruce budworm Douglas-fir, current-year buds (Choristoneura occidentalis) white fir, and foliage grand fir.
Western spruce budworm egg mass surveys; progress report. USDA Forest Service, Methods Application Group, Davis, Calif.
Report Johnson, P. C., and R. E. Denton. Outbreaks of the western spruce budworm in the American Northern Rocky Mountain area from through USDA Forest Service, Intermountain Forest and Range Expt.
Sta.Western spruce budworm: Results of an egg mass survey on the Pike and San Isabel, and Arapaho and Roosevelt National Forests in (Biological evaluation) Key Phrase page for western spruce budworm: Books containing the phrase 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.