2 edition of Some environmental factors influencing rearing of the spruce budworm, Choristoneura fumiferana (Clem.) (Lepidoptera: Tortricidae) under laboratory conditions found in the catalog.
Some environmental factors influencing rearing of the spruce budworm, Choristoneura fumiferana (Clem.) (Lepidoptera: Tortricidae) under laboratory conditions
Gary Boyd Pitman
Written in English
|Statement||by Gary Boyd Pitman.|
|The Physical Object|
|Pagination||105 leaves, bound :|
|Number of Pages||105|
namics of eastern spruce budworm, Choristoneura fumiferana (Clemens). The Silviculture Hypothesis ﬁrst arose in the s, with the idea that outbreaks were driven by forestry practices favoring susceptible softwood species. In the s, it was proposed that populations were governed by Multiple Equilibria, with warmFile Size: KB. We note that E1 and E2 always exist. Since E3 has negative (or complex) coordinates, it does not have any biological significance, so it is not considered here. As for E4, this point has biological significance only in the case where J.l. (Royama et al., ). However, at this stage, we have not considered these factors to simplify the discussion. The main focus of this paper is to study the effect of the matura-tion delay on the spruce budworm outbreak. The delay differential equation Let the size distribution of the budworm population be denoted by N(t,a),wherea is. The factors influencing those communities and the effects of those communities on the health of the budworm and on its food web have yet to be determined. This project aims to answer those questions and to give a clearer outlook on the spruce budworm microbiome role, .
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Choristoneura fumiferana, the eastern spruce budworm, is a species of moth of the family is also commonly referred to as the spruce budworm. It is one of the most destructive native insects in the northern spruce and fir forests of the eastern United States and range is also the widest of all the budworm species.
Eastern spruce budworm populations can experience Family: Tortricidae. Investigations were carried out to determine the effect of ecological factors on the induction of diapause in the spruce budworm.
Experimental rearings were conducted at elevations ofand feet. The foliage of spruce, Douglas fir and alpine fir were used as hosts. Progeny of Ontario, two-year and one-year types reared under one-year and two-year life cycle conditions were used Cited by: 4.
Spruce budworm individual ecology. Spruce budworm (Choristoneura fumiferana) is a serious defoliator of North American conifers that feeds on buds in the early spring. Field-rearing. Surprisingly, the influence of this parasitoid as a mortality factor in outbreaking spruce budworm populations is relatively low (McGugan and BlaisJ.
unpublished data). Relative to the s Spruce Budworm Infestation When an outbreak of the eastern spruce budworm (Choristoneura fumiferana) (Clem.) began in the boreal forests of eastern Canada and the bordering United States in the late s,changes of immense consequence to the forests and their inhabitants were set in ,the vastness and isolationFile Size: 1MB.
The Spruce Budworm Model One of the models discussed in this paper is of interest to us because it involves an insect pest found in northern Minnesota pineries, the spruce budworm (Choristoneura fumiferana).
The model was developed in Canada to describe infestations observed there, but is certainly relevant to northern Minnesota. Spruce budworm Choristoneura fumiferana Order Lepidoptera, Family Tortricidae; tortricids Native pest Host plants: Balsam fir is preferred, but white, red, and black spruces, larch, pine, and western hemlock are also susceptible.
Description: Adult moths are mostly gray, with a wing-span for males of 24 mm and for females of 26 Size: 56KB. EASTERN SPRUCE BUDWORM, (Choristoneura fumiferana) BACKGROUND. The eastern spruce budworm is the most destructive and widely distributed forest defoliator in North America.
The destructive phase of this pest is the larva or caterpillar stage. Lengthy large scale population outbreaks have caused widespread mortality in spruce/fir forests File Size: KB. Blackburnian Warblers consumed the most Choristoneura (X = 28 budworms/ha), followed by Cape May Warblers (X = 26 budworms/ha), and grading down to no consumption by some species.
In plots where spruce budworm densities ranged from low to transitional, the entire bird community as well as specific groups of birds, i.e., overstory Cited by: Pungenin was synthesized from 3,4-dihydroxyacetophenone by a short sequence involving manipulation of protecting groups on the 3 and 4 hydroxyl functions.
Bioassays indicated that the glucoside is a modest feeding deterrent for sixth-instar spruce budworm larvae, but it does not appear to retard the development of small larvae or lead to increased by: Measurement, analysis, and interpretation of mortality factors in insect survivorship studies, with reference to the spruce budworm, Choristoneura fumiferana (Clem.) (Lepidoptera: Tortricidae)Cited by: Rearing Spruce Budworm Parasites 8 The spruce budworm, Choristoneura fumiferana (Clemens), is one of the most destructive forest insects in probably as a result of climatic factors and the limited availability of food.
Natural control agents (e.g. he spruce budworm, Choristoneura fumiferana (Clemens), is the most destructive and widely distributed forest defoliator in North America.
The destructive phase of this pest is the larval or caterpillar stage. Massive budworm outbreaks occur periodically, destroying hundreds of thousands of. Abstract. The primary sex pheromone components of the female spruce budworm, Choristoneura fumiferana (Clem.) (Lepidoptera: Tortricidae), are (E)- and (Z)tetradecenal, produced in ratio.
However, male flight responses to calling females in a wind tunnel were faster and maintained longer than responses to any synthetic aldehyde blend.
these boreal forest defoliators is the spruce budworm (Choristoneura fumiferana Clemens) that in the s affected over 50 million hectares of fir (Abies spp.) and spruce (Picea spp.) forests at its peak in Eastern Canada and the NortheasternCited by: Description.
The eastern spruce budworm, Choristoneura fumiferana (Clemens), is the dominant agent of insect disturbance in the forests of eastern Canada. In the light of the current outbreak in Quebec, a team of CFS scientists is investigating the ecological factors that favour the onset of outbreaks and where in the population cycle intervention strategies can bring rising populations back.
Spruce budworm, Larva of a leaf roller moth (Choristoneura fumiferana), one of the most destructive North American pests. It attacks evergreens, feeding on needles and pollen, and can completely defoliate spruce and related trees, causing much loss for the lumber industry and damaging landscapes.
The effect of RH (tebufenozide), a non-steroidal ecdysone agonist, on adult development of the spruce budworm, Choristoneura fumiferana, was investigated by administering the compound intrahemocoelically to pupae on days 1–6 after pupal concentrations of ng/pupa there was significant mortality but at doses of 50– ng/pupa, the emerging adults displayed wing Cited by: Agricultural and Forest Meteorology () – Contents Spruce budworm Choristoneura fumiferana Long-distance assumed dispersal Aerobiology Agent-based modeling a b s t r a c t multiple scales at which these factors interact (Gage et al., ).
A literature review of the spruce, western, and 2-year-cycle budworms: Choristoneura fumiferana, C. occidentalis, and C. biennis (Lepidoptera: Tortricidae) by McKnight, Melvin E; Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)Pages: that influence spruce budworm generational survival, and hence in outbreak characteristics, could not be assessed.
Large spatial variation in the severity and duration of a spruce budworm outbreak do exist at the landscape level (Candau et al.
; Gray et al. ), and the potential role of climatic factors in influencing outbreak. A literature review of the spruce, western, and 2-year-cycle budworms: Choristoneura fumiferana, C. occidentalis, and C. biennis (Lepidoptera: Tortricidae) / Related Titles.
Series: USDA Forest Service Research paper RM ; 44 By. The spruce budworm (Choristoneura fumiferana) is a major insect defoliator of softwood species in northeastern North commercial importance stems from periodic epidemics during which it damages extensively the spruce and fir on which the pulp and paper industry by: Feeding preferences of spruce budworm (Choristoneura fumiferana Clem.) larvae to some host-plant chemicals.
Albert PJ(1), Jerrett PA. Author information: (1)Department of Biology, Concordia University, Sherbrooke St. W., H4B1R6, Montreal, by: POPULATION DYNAMICS OF THE SPRUCE BUDWORM CHORISTONEURA FUMIFERANA' T.
ROYAMA Maritimes Forest Research Centre, Canadian Forestry Service, Department of the Environment, P.O. BoxFredericton, New Brunswick E3B 5P7, Canada Abstract. Using the latest observations, experiments, and theoretical studies, I have reanalyzed.
What is the spruce budworm and where does it come from. The spruce budworm is a native North American insect whose caterpillar measures about 20 to 30 millimeters and is a voracious eater of conifer needles, specifically, those of white, red and black spruce as well as balsam fir.
This Artificial Diet May Make Insect Rearing Easier. Entomology Today February 5, 2 Comments. A spruce budworm caterpillar (Choristoneura fumiferana). Photo by Jerald E. Dewey, USDA Forest Service, which claims that the diet is suitable for the rearing of spruce budworm, cabbage looper, fir coneworm, and eight other moths.
The spruce budworm (Choristoneura fumiferana) is a destructive forest caterpillars of these moths in the family Tortricidae feed on balsam fir, white spruce, red spruce, and black spruce.
During an outbreak in the mids, which lasted years, they defoliated nearly 52 million hectares of boreal forest in eastern Canada, and a more recent outbreak in Quebec that began.
Enhanced vertical fuel continuity in forests defoliated by spruce budworm (Choristoneura fumiferana Clem.) promotes the transition of a surface fire into a crown fire Graham Alexander Watt Doctor of Philosophy Faculty of Forestry University of Toronto ABSTRACTAuthor: Graham Alexander Watt.
One of the most intensely studied forest insects in terms of its aerobiology is the spruce budworm (SBW), Choristoneura fumiferana (Clem.) , the larvae of which periodically defoliate spruce (Picea spp.) and balsam fir (Abies balsamea L.) across broad regions of the North American boreal forest .Endemic populations of the SBW are subject to mate-finding and demographic Allee effects [11,12 Cited by: 3.
Budworm outbreaks may be sustained for 25 years or more. Host trees: Primarily Douglas-fir, with other tree species such as the true firs, larch and to a lesser degree, spruce, also impacted by the western spruce budworm.
Description and life cycle: The western. Lisa M. Lumley and Felix A.H. Sperling, Life‐history traits maintain the genomic integrity of sympatric species of the spruce budworm (Choristoneura fumiferana) group on an isolated forest island, Ecology and Evolution, 1, 2, (), ().
Description Distribution. Canada. Micro-habitat(s) Needle, Bud, Male flower, Cone. Damage, symptoms and biology. Spruce budworm damage appears in May. Evidence of a spruce budworm infestation includes the destruction of buds, abnormal spreading of new twigs, defoliation of current-year shoots and, if an affected branch is disturbed, the presence of large numbers of larvae suspended from.
The spruce budworm (Choristoneura fumiferana) is the most destructive insect defoliator of forests in North America. Climatic influences on this species' life history are considered a major factor in restricting the extent and intensity of outbreaks.
In this paper we examine the effects of a spruce budworm (Choristoneura fumiferana (Clem.)) outbreak on a boreal mixed-wood bird community in stands representing a range of successional stages. Spruce budworm are a major driver of ecosystem dynamics, and their outbreaks have profound effects on forest composition and structure over very large Cited by: Population density estimation of spruce budworm, Choristoneura fumiferana (Clem.) (Lepidoptera: Tortricidae) on balsam fir and white spruce from cm mid.
Landscape host abundance and configuration regulate periodic outbreak behavior in spruce budworm (Choristoneura fumiferana Clem.) Abstract Landscape-level forest management has long been hypothesized to affect forest insect outbreak dynamics, but empirical evidence remains elusive.
We hypothesized that the combination of increased hardwood Cited by: Evaluation of Neoaplectana carpocapsae for Biological Control of the Western Spruce Budworm, Choristoneura occidentalis: Ineffectiveness and Persistence of Tank Mixes Harry K.
Cited by: 7. Spruce Budworm. Scientific name: Choristoneura fumiferana Phenology models predict timing of events in an organism's development. For many organisms which cannot internally regulate their own temperature, development is dependent on temperatures to which they are exposed in the environment.
A white spruce, Picea glauca (Moench) Voss. (pinaceae), plantation in southern Quebec contained two distinct types of trees: resistant and susceptible to attack by spruce budworm, Choristoneura fumiferana (Clem.) (Lepidoptera: Tortricidae). The primary purpose of this study was to evaluate if and how the pattern of feeding and oviposition preference are modified in response to past nutritional Cited by: 1.
the name of the spruce budworm. These two budworms have similar life cycles and habits, but differ in geographic range and hosts. I'll use the spruce budworm as an example and note any differences for the western spruce budworm. Life Cycle and Habits The spruce budworm has a I-year life cycle.
The rate of development of each.In this paper we examine the effects of a spruce budworm (Choristoneura fumiferana (Clem.)) outbreak on a boreal mixed-wood bird community in stands representing a range of successional stages.
Spruce budworm are a major driver of ecosystem dynamics, and their outbreaks have profound effects on forest composition and structure.Research Priorities As the next outbreak approaches, there is an opportunity to draw from and build on scientific research that has occurred since the last outbreak.
There is an urgent need and opportunity for new research by U.S. and Canadian researchers in the region to increase our understanding about SBW biology, monitoring, control, and.