RELEASE RATES AND ATTRACTION OF PVC LURES CONTAINING SYNTHETIC SEX ATTRACTANT OF THE SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (LEPIDOPTERA: TORTRICIDAE)

1981 ◽  
Vol 113 (2) ◽  
pp. 103-111 ◽  
Author(s):  
C. J. Sanders
Keyword(s):  
Sex Attractant ◽  
Choristoneura Fumiferana ◽  
Spruce Budworm ◽  
Field Trapping ◽  
Direct Proportion ◽  
Release Rates ◽  
Time Intervals ◽  
Lower Temperature ◽  
Number Of Males ◽  
Over Time

AbstractRelease rates of synthetic attractant of the spruce budworm, Choristoneura fumiferana (Clem.), from a PVC formulation were determined by weight loss. They varied in direct proportion to the initial concentration of the attractant and also with the size of the pellet. Release rates declined by about 50% over the time intervals of 10–40 days and 40–100 days. Initially they were two to three times lower at 10°C than at 21°C, but were far more constant over time at the lower temperature. A pellet weighing 130 mg containing 42 μg of attractant released an estimated .1–1 μg/day, or 4–40 ng/h, which is close to the rate of emission by a calling female (Silk et al. 1980), and field trapping data showed that a lure this size attracted the same number of males as a calling female.

Derivation of Pheromone-Based Larval Thresholds in Spruce Budworm Accounting for Distance to Defoliated Forest Stands

2021 ◽  
Author(s):  
Marc Rhainds ◽  
Ian DeMerchant ◽  
Pierre Therrien
Keyword(s):  
Boreal Forests ◽  
Large Scale ◽  
Choristoneura Fumiferana ◽  
Intervention Strategy ◽  
Spruce Budworm ◽  
Interactive Effects ◽  
The Novel ◽  
Forest Stands ◽  
General Guideline ◽  
Number Of Males

Abstract Spruce budworm, Choristoneura fumiferana Clem. (Lepidoptera: Tortricidae), is the most severe defoliator of Pinaceae in Nearctic boreal forests. Three tools widely used to guide large-scale management decisions (year-to-year defoliation maps; density of overwintering second instars [L2]; number of males at pheromone traps) were integrated to derive pheromone-based thresholds corresponding to specific intergenerational transitions in larval densities (L2i → L2i+1), taking into account the novel finding that threshold estimates decline with distance to defoliated forest stands (DIST). Estimates of thresholds were highly variable between years, both numerically and in terms of interactive effects of L2i and DIST, which limit their heuristic value. In the context of early intervention strategy (L2i+1 > 6.5 individuals per branch), however, thresholds fluctuated within relatively narrow intervals across wide ranges of L2i and DIST, and values of 40–200 males per trap may thus be used as general guideline.

LABORATORY BIOASSAY OF THE SEX PHEROMONE OF THE FEMALE EASTERN SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (LEPIDOPTERA: TORTRICIDAE)

1971 ◽  
Vol 103 (5) ◽  
pp. 631-637 ◽  
Author(s):  
C. J. Sanders
Keyword(s):  
Sex Pheromone ◽  
Choristoneura Fumiferana ◽  
Spruce Budworm ◽  
Maximum Response ◽  
Continuous Illumination ◽  
Natural Lighting ◽  
Eastern Spruce Budworm ◽  
Minor Peak ◽  
A Minor ◽  
Number Of Males

AbstractA simple and inexpensive olfactometer based on that of Gaston and Shorey (1964) is described for bioassaying the sex pheromone of the eastern spruce budworm. The number of males buzzing (rapidly beating their wings while circling on the substrate) after the introduction of the sample into the airstream of the olfactometer was used as measure of response. Males held under continuous illumination showed maximum response when 2 to 3 days old. Under natural lighting males showed a circadian rhythm, with peak response shortly after dark and a minor peak in mid-morning. Since per cent response under continuous illumination exceeded the maximum response under natural lighting, it is recommended that bioassays be carried out with 2- to 3-day-old males held under continuous illumination.

CONTROLLED-RELEASE SEX PHEROMONE LURES FOR MONITORING SPRUCE BUDWORM POPULATIONS

1987 ◽  
Vol 119 (4) ◽  
pp. 305-313 ◽  
Author(s):  
C.J. Sanders ◽  
E.A. Meighen
Keyword(s):  
Controlled Release ◽  
Sex Pheromone ◽  
Choristoneura Fumiferana ◽  
Spruce Budworm ◽  
Significant Loss ◽  
Hollow Fibers ◽  
Rate Data ◽  
Pheromone Components ◽  
Over Time ◽  
Capture Rates

AbstractFive formulations of the primary sex pheromone components of the spruce budworm (Choristoneura fumiferana [Clem.]) were evaluated as lures for monitoring spruce budworm populations: Biolures (Consep Membranes Inc.), Luretape plastic flakes (Hercon, Healthchem Corp.), polyethylene vials (International Pheromone Systems), hollow fibers (Albany International), and polyvinyl chloride (PVC) pellets. PVC pellets showed significant loss in attractiveness over the required 6-week period. Also, different batches of PVC pellets had very different rates of pheromone release and attraction; the oldest lures, stored for the longest period, were the most attractive. Luretape caught fewer moths than anticipated from the release-rate data and showed wide variation in catch among individual lures. Fibers were inconsistent. Biolures and polyethylene vials showed the lowest decline in attractiveness over time and the lowest variation in catch among individual lures, but their capture rates were higher than necessary.

BEHAVIOURAL EFFECTS OF SECONDARY COMPONENTS OF THE SEX PHEROMONE OF THE EASTERN SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (LEPIDOPTERA: TORTRICIDAE)

1983 ◽  
Vol 115 (9) ◽  
pp. 1053-1058 ◽  
Author(s):  
A. R. Alford ◽  
P. J. Silk ◽  
M. McClure ◽  
C. Gibson ◽  
J. Fitzpatrick
Keyword(s):  
Sex Pheromone ◽  
Wind Tunnel ◽  
Choristoneura Fumiferana ◽  
Spruce Budworm ◽  
Field Observations ◽  
Eastern Spruce Budworm ◽  
Behavioural Effects ◽  
Low Levels ◽  
Number Of Males

AbstractLaboratory wind tunnel and field observations have demonstrated an important behavioural role of tetradecanal (14:Ald) in the chemical communication system of the spruce budworm, Choristoneura fumiferana (Clemens). A greater number of males initiated upwind flight and continued on to contact the source when 14:Ald was present than with 95/5 E/Z11-tetradecenal (E/Z11-14:Ald) alone. The presence of E11-tetradecen-1-ol acetate (E11-14:Ac) decreased the males' responsiveness to the aldehydes. Its effect appeared to be attenuated, when present at low levels with 95/5 E/Z11-14:Ald, by the presence of 14:Ald, but it is still unclear what effects low levels of E11-14:Ac have on male behaviour.

EVALUATION OF SEX ATTRACT ANT TRAPS FOR MONITORING SPRUCE BUDWORM POPULATIONS (LEPIDOPTERA: TORTRICIDAE)

1978 ◽  
Vol 110 (1) ◽  
pp. 43-50 ◽  
Author(s):  
C. J. Sanders
Keyword(s):  
Sex Attractant ◽  
Choristoneura Fumiferana ◽  
Spruce Budworm ◽  
Low Density ◽  
Commercial Sex

AbstractFour commercial sex attractant traps were evaluated for monitoring low density spruce budworm (Choristoneura fumiferana (Clem.)) populations. Factors considered were color, the number of male budworm caught, durability of traps and their ability to exclude non-target insects and debris. The Pherocon 1CP was superior to 3-M Brand Sectar 1 and XC-26; Pherocon 1C was least suitable. Interpretation of the numbers captured may be confounded by the fact that trapped males repel other males.

SEX PHEROMONE OF THE EASTERN SPRUCE BUDWORM (LEPIDOPTERA: TORTRICIDAE): OPTIMUM BLEND OF TRANS- AND CIS-11-TETRADECENAL

1976 ◽  
Vol 108 (11) ◽  
pp. 1285-1290 ◽  
Author(s):  
C. J. Sanders ◽  
J. Weatherston
Keyword(s):  
Sex Pheromone ◽  
Choristoneura Fumiferana ◽  
Spruce Budworm ◽  
Field Trapping ◽  
Eastern Spruce Budworm

AbstractA reinvestigation of the sex pheromone of the eastern spruce bud worm, Choristoneura fumiferana (Clem.), showed that it contains 11-tetradecenal in the ratio 96% trans-: 4% cis-. Field trapping showed the pure trans- compound to be only slightly attractive. Maximum attraction occurred in the range 2% to 5% cis-.

scholarly journals STUDIES OF PHYSIOLOGICALLY ACTIVE ARTHROPOD SECRETIONS: X. SEX PHEROMONE OF THE EASTERN SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (LEPIDOPTERA: TORTRICIDAE)

1971 ◽  
Vol 103 (12) ◽  
pp. 1741-1747 ◽  
Author(s):  
J. Weatherston ◽  
W. Roelofs ◽  
A. Comeau ◽  
C. J. Sanders
Keyword(s):  
Sex Pheromone ◽  
Chemical Analysis ◽  
Choristoneura Fumiferana ◽  
Spruce Budworm ◽  
Field Trapping ◽  
Eastern Spruce Budworm ◽  
Pheromone System ◽  
Laboratory Bioassays

AbstractThe sex pheromone of the female eastern spruce budworm was identified as trans-11-tetradecenal by a combination of electroantennogram techniques, laboratory bioassays, and chemical analysis. Subsequent field trapping showed that this compound is a potent attractant for both male Choristoneura fumiferana (Clem.) and C. occidentalis Free, thus supporting its identification as a sex pheromone of the eastern spruce budworm and suggesting that it is also a major component in the pheromone system of C. occidentalis.

Reduced spore production Nosema fumiferanae (Microsporida) in spruce budworm (Choristoneura fumiferana) reared at elevated temperature

1979 ◽  
Vol 57 (5) ◽  
pp. 1167-1168 ◽  
Author(s):  
G. G. Wilson
Keyword(s):  
Elevated Temperature ◽  
Choristoneura Fumiferana ◽  
Spruce Budworm ◽  
Spore Production ◽  
Host Insect ◽  
Lower Temperature

Rearing of naturally infected spruce budworm, Choristoneura fumiferana, at 23 °C resulted in an increase of 0.4 × 105 to 315.3 × 105Nosema fumiferanae spores in a 7- to 21-day period. At 30 °C, no increase in the number of spores was found in the same period. Removal of the host insect to the lower temperature resulted in reestablishment of spore production.

SEX ATTRACTANTS FOR TWO SPECIES OF WESTERN SPRUCE BUDWORM, CHORISTONEURA BIENNIS AND C. VIRIDIS (LEPIDOPTERA: TORTRICIDAE)

1974 ◽  
Vol 106 (2) ◽  
pp. 157-159 ◽  
Author(s):  
C. J. Sanders ◽  
G. E. Daterman ◽  
R. F. Shepherd ◽  
H. Cerezke
Keyword(s):  
British Columbia ◽  
Sex Attractant ◽  
Choristoneura Fumiferana ◽  
Spruce Budworm ◽  
Field Trials ◽  
Western Spruce Budworm ◽  
Sex Attractants ◽  
Tetradecenyl Acetate

AbstractField trials were conducted in British Columbia and Oregon in 1972, which demonstrated that trans-11-tetradecenal, a sex attractant for male Choristoneura fumiferana and C. occidentalis, is also a sex attractant for male 2-year-cycle spruce budworm, C. biennis, and that trans-11-tetradecenyl acetate is a sex attractant for male green budworm, C. viridis Free.

THE OCCURRENCE OF (E)-11-TETRADECEN-1-OL, A KNOWN SEX ATTRACTANT INHIBITOR, IN THE ABDOMINAL TIPS OF VIRGIN FEMALE EASTERN SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (LEPIDOPTERA: TORTRICIDAE)

1974 ◽  
Vol 106 (3) ◽  
pp. 281-284 ◽  
Author(s):  
J. Weatherston ◽  
W. Maclean
Keyword(s):  
Sex Pheromone ◽  
Spectral Data ◽  
Sex Attractant ◽  
Choristoneura Fumiferana ◽  
Virgin Female ◽  
Spruce Budworm ◽  
Mass Spectral Data ◽  
Mass Spectral ◽  
Eastern Spruce Budworm ◽  
Attractant Inhibitor

AbstractThe sex-pheromone-producing gland of the eastern spruce budworm, in addition to producing the sex attractant (E)-11-tetradecenal, has been shown by gas chromatographic and mass spectral data to contain (E)-11-tetradecen-1-ol, a known inhibitor to the sex attractant.

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