Field evaluation of host kairomones and pheromones for capture of Conophthorus coniperda (Coleoptera: Scolytidae)

2006 ◽  
Vol 138 (5) ◽  
pp. 723-732 ◽  
Author(s):  
A.M. Brauner ◽  
P. de Groot
Keyword(s):  
Field Evaluation ◽  
Field Studies ◽  
Trap Catch ◽  
White Pine ◽  
Release Rates ◽  
Female Response ◽  
Pine Cone ◽  
Equivalent Efficacy ◽  
Trap Catches ◽  
Conophthorus Coniperda

AbstractField studies were conducted to determine the attractiveness of monoterpenes and pheromones to the white pine cone beetle, Conophthorus coniperda (Schwarz), the most destructive cone and seed pest of eastern white pine, Pinus strobus L. (Pinaceae). Limonene was identified as a new attractant that acts synergistically when added to the female-produced sex pheromone, pityol. Trap catches were higher with increasing release rates of S-(–)-limonene. The enantiomers of limonene showed equivalent efficacy on mean trap catch. (–)-β-Pinene was not attractive and may be repellent to both sexes, and (–)-α-pinene was shown to have no effect on female response when added to pityol or pityol + S-(–)-limonene. The pheromones trans-verbenol, trans-pinocarveol, and myrtenol were not attractive to C. coniperda.

RESPONSE OF CONE AND TWIG BEETLES (COLEOPTERA: SCOLYTIDAE) AND A PREDATOR (COLEOPTERA: CLERIDAE) TO PITYOL, CONOPHTHORIN, AND VERBENONE

2000 ◽  
Vol 132 (6) ◽  
pp. 843-851 ◽  
Author(s):  
Peter de Groot ◽  
Gary L. DeBarr
Keyword(s):  
Field Studies ◽  
The United States ◽  
Thanasimus Dubius ◽  
White Pine ◽  
Pheromone Communication ◽  
Pine Cone ◽  
Baited Traps ◽  
Potential Inhibitors ◽  
Trap Catches ◽  
Conophthorus Coniperda

AbstractField studies were conducted in the United States and Canada to determine the response of the white pine cone beetle, Conophthorus coniperda (Schwarz), and the red pine cone beetle, Conophthorus resinosae Hopkins, to two potential inhibitors, conophthorin and verbenone, of pheromone communication. Trap catches of male C. coniperda and C. resinosae were significantly reduced and generally declined with increasing concentrations of conophthorin in traps baited with the pityol, a female-produced pheromone. Verbenone did not significantly reduce trap catches of C. coniperda. Conophthorin, but not verbenone, significantly reduced cone attacks by C. coniperda when placed near cone clusters. The twig beetles, Pityophthorus cariniceps LeConte and Pityophthorus puberulus (LeConte), responded to traps with pityol and α-pinene baits alone or with conophthorin. Thanasimus dubius (F) (Coleoptera: Cleridae) was attracted to the pityol and α-pinene, but conophthorin had no effect on attraction of this generalist bark beetle predator. Verbenone significantly reduced trap catches of T. dubius in pityol-baited traps.

Response of Pityophthorus puberulus (Coleoptera: Curculionidae: Scolytinae) to pheromones and terpenes

2007 ◽  
Vol 139 (5) ◽  
pp. 742-747 ◽  
Author(s):  
A.M. Brauner ◽  
Peter de Groot
Keyword(s):  
Sex Pheromone ◽  
Pinus Strobus ◽  
Field Studies ◽  
Host Recognition ◽  
White Pine ◽  
Eastern White Pine ◽  
Seed Orchards ◽  
Pine Cone ◽  
Conophthorus Coniperda

AbstractIn field studies conducted to improve trapping programs for the white pine cone beetle, Conophthorus coniperda (Schwarz), a twig beetle, Pityophthorus puberulus (LeConte), a common associate of eastern white pine, Pinus strobus L. (Pinaceae), in seed orchards, was also captured. In these experiments, P. puberulus was attracted to traps containing the sex pheromone pityol with or without the monoterpenes (−)-α-pinene and (−)-β-pinene, but attraction to traps was inhibited when S-(−)-limonene was present. We speculate that limonene may play an important role in host recognition and suitability, by indicating a resource suitable for C. coniperda but unsuitable for P. puberulus.

The Life History of the White-Pine Cone Beetle, Conophthorus coniperda

1965 ◽  
Vol 58 (2) ◽  
pp. 213-219 ◽  
Author(s):  
P. A. Godwin ◽  
T. M. Odell
Keyword(s):  
Life History ◽  
White Pine ◽  
Pine Cone ◽  
History Of ◽  
Conophthorus Coniperda

Use of pityol to reduce damage by the white pine cone beetle, Conophthorus coniperda (Col., Scolytidae) in seed orchards

2004 ◽  
Vol 128 (6) ◽  
pp. 403-406 ◽  
Author(s):  
R. Trudel ◽  
C. Guertin ◽  
P. Groot
Keyword(s):  
White Pine ◽  
Seed Orchards ◽  
Pine Cone ◽  
Conophthorus Coniperda

Behavior and Generation Dynamics of the White Pine Cone Beetle Conophthorus coniperda (Schwarz) in Central Wisconsin1

1976 ◽  
Vol 69 (5) ◽  
pp. 863-871 ◽  
Author(s):  
F. David Morgan ◽  
Maweu Mailu
Keyword(s):  
White Pine ◽  
Pine Cone ◽  
Conophthorus Coniperda

Pheromones in white pine cone beetle,Conophthorus coniperda (schwarz) (Coleoptera: Scolytidae)

1995 ◽  
Vol 21 (2) ◽  
pp. 143-167 ◽  
Author(s):  
Göran Birgersson ◽  
Gary L. Debarr ◽  
Peter de Groot ◽  
Mark J. Dalusky ◽  
Harold D. Pierce ◽  
...  
Keyword(s):  
White Pine ◽  
Pine Cone ◽  
Conophthorus Coniperda

EVIDENCE FOR A FEMALE-PRODUCED PHEROMONE IN THE WHITE PINE CONE BEETLE, CONOPHTHORUS CONIPERDA (SCHWARZ), AND IN THE RED PINE CONE BEETLE, C. RESINOSAE HOPKINS (COLEOPTERA: SCOLYTIDAE)

1991 ◽  
Vol 123 (5) ◽  
pp. 1057-1064 ◽  
Author(s):  
P. de Groot ◽  
G.L. DeBarr ◽  
G.O. Birgersson ◽  
H.D. Pierce ◽  
J.H. Borden ◽  
...  
Keyword(s):  
North Carolina ◽  
Field Experiments ◽  
Field Tests ◽  
Red Pine ◽  
Host Volatiles ◽  
White Pine ◽  
Strong Response ◽  
Pine Cone ◽  
Laboratory Bioassays ◽  
Conophthorus Coniperda

AbstractEvidence for a female-produced sex pheromone in the white pine cone beetle, Conophthorus coniperda (Schwarz), and the red pine cone beetle, C. resinosae Hopkins, was obtained from laboratory bioassays and field experiments conducted with C. coniperda beetles from Ontario and North Carolina. In an olfactometer, males from both species responded significantly more to volatiles from females than to volatiles from males or cones. Generally, females did not differ in their response to female-, male-, or cone-produced volatiles. Both sexes responded to host volatiles. The strong response by male C. coniperda to females was confirmed in field tests.

Current understanding of white and red pine physiology

1994 ◽  
Vol 70 (4) ◽  
pp. 420-426 ◽  
Author(s):  
Suzanne Wetzel ◽  
Darwin Burgess
Keyword(s):  
Economic Value ◽  
Measurement Data ◽  
Field Studies ◽  
Forest Growth ◽  
Red Pine ◽  
Tree Level ◽  
White Pine ◽  
Growth Measurement ◽  
Pine Tree ◽  
Physiological Processes

For significant and predictable improvements in productivity of red and white pine forests, an increased understanding of the physiological processes in these species is essential. Relatively little physiological research has focused on these two species over the last two decades. However, with renewed interest in these species now for their high social, environmental and economic value this situation is changing. This paper describes past efforts at understanding red and white pine physiology, as well as discussing recent achievements. In addition, new results obtained by the authors through the use of Biotronic growth units are described in more detail to emphasize the high adaptability of white pine seedlings in response to nutrient stress through changes in carbon distribution, nutrient uptake and utilization.The ultimate practical output of much forestry research is often models predicting tree and forest growth. However, models which are based solely on empirical growth measurement data will not provide the understanding that is necessary for sustainable management; thus, increased research on physiological processes will continue to be required in future. Long-term detailed field studies that consider environmental and silvicultural influences at the organ and whole tree level are required to ensure that future models have high explanatory value. Key words: white pine, red pine, tree physiology, photosynthesis, seedling nutrition, silviculture

Use of Seedling Growth Parameters to Classify Soybean (Glycine max) Cultivar Sensitivity to Sulfentrazone

1999 ◽  
Vol 13 (3) ◽  
pp. 530-535 ◽  
Author(s):  
Zhaohu Li ◽  
Robert H. Walker ◽  
Glenn Wehtje ◽  
H. Gary Hancock
Keyword(s):  
Glycine Max ◽  
Seedling Growth ◽  
Root Length ◽  
Reduction Method ◽  
Growth Parameters ◽  
Field Evaluation ◽  
Relative Sensitivity ◽  
Field Studies ◽  
Laboratory Studies ◽  
Length Reduction

Hypocotyl and root length reduction of soybean (Glycine max) seedlings when seeds were exposed to sulfentrazone during germination were used as indices to classify cultivar response to soil-applied sulfentrazone. Seeds of ‘Stonewall’ (sulfentrazone tolerant) and ‘Asgrow 6785’ (sulfentrazone sensitive) were imbibed and allowed to germinate in 0, 1, 5, 10, and 50 ppm aqueous sulfentrazone solutions for 4 d. Hypocotyl and root lengths were reduced in both cultivars, but the reductions were greater for Asgrow 6785 than for Stonewall. Subsequently, the relative sensitivity of 28 cultivars to sulfentrazone was independently determined by two variations of the hypocotyl reduction method (both conducted in the laboratory) and by traditional full-season field evaluation. Results from laboratory and field studies were in agreement for cultivars distinctly sensitive or tolerant to sulfentrazone. However, cultivars with intermediate tolerance in laboratory studies produced variable responses in the field.

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