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.

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 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.

Effects of Ethanol and α-Pinene in a Generic Trap Lure Blend for Pine Bark and Wood-Boring Beetles in Southeastern United States

2020 ◽  
Vol 55 (3) ◽  
pp. 310-320
Author(s):  
D.R. Miller
Keyword(s):  
United States ◽  
Southeastern United States ◽  
Cost Effective ◽  
Pine Bark ◽  
Thanasimus Dubius ◽  
Baited Traps ◽  
Pinus Taeda L ◽  
Hylobius Pales ◽  
Trap Catches ◽  
Wood Boring

Abstract Managers of detection programs for bark and wood-boring beetles require cost-effective trap lure combinations that maximize species detections. A trapping study was conducted in 2012 to determine the effects of ethanol and α-pinene lures on beetle catches in traps baited with ipsenol and ipsdienol lures in a stand of Pinus taeda L. in north-central Georgia. Traps with all four compounds worked well for 20 of 25 species of bark and wood-boring beetles, and associated predators. Catches of Acanthocinus obsoletus (LeConte) and Monochamus titillator (F.) (Cerambycidae), Hylastes porculus Erichson, Hylastes salebrosus Eichhoff, Hylobius pales (Herbst), Orthotomicus caelatus (Eichhoff) (Curculionidae), Thanasimus dubius (F.) (Cleridae), and Temnoscheila virescens (F.) (Trogossitidae) in baited traps increased with the addition of ethanol and α-pinene with maximum catches in traps baited with all four compounds. Catches of Ips avulsus (Eichhoff) (Curculionidae) decreased with the addition of both compounds; the lowest numbers of I. avulsus and Ips grandicollis (Eichhoff) were caught in traps baited with all four compounds. α-Pinene increased catches of Buprestis lineata F. (Buprestidae), Ips calligraphus (Germar), Pachylobius picivorus (Germar) (Curculionidae), Corticeus spp. (Tenebrionidae), Lasconotus spp., and Pycnomerus sulcicollis LeConte (Zopheridae); ethanol had no effect on these species. Ethanol increased trap catches of Curius dentatus Newman (Cerambycidae), Dryoxylon onoharaense (Murayama) (Curculionidae) and Platysoma spp. (Histeridae); α-pinene reduced catches. The data suggest that ethanol and α-pinene should be retained with ipsenol and ipsdienol as a generic trap lure blend for pine bark and wood-boring beetles in southeastern United States.

Field studies with the synthetic sex pheromone and inhibitor of the red bollworm Diparopsis castanea Hmps. (Lepidoptera, Noctuidae) in Malawi

1976 ◽  
Vol 66 (2) ◽  
pp. 243-265 ◽  
Author(s):  
R. J. Marks
Keyword(s):  
Sex Pheromone ◽  
Corn Oil ◽  
Field Studies ◽  
Point Sources ◽  
Baited Traps ◽  
Pheromone Concentration ◽  
Synthetic Sex Pheromone ◽  
Close Range ◽  
Trap Catches ◽  
Lepidoptera Noctuidae

AbstractThe synthetic sex pheromone of Diparopsis castanea Hmps., dicastalure, is a 4:1 synergistic combination of 93% trans:7% cis-9,11-dodecadien-1-yl acetate (IV) and the unattractive compound 11-dodecen-1-yl acetate (IIB). Both cis and trans-9-dodecen-1-yl acetate (IIA), the latter occurring in the female pheromone gland, are potent inhibitors of male attraction, as little as 10–4 mg IIA significantly reducing the attractiveness of virgin females in pheromone traps for more than one month in the field. Inhibition is typically close range, although higher concentrations are inhibitory when placed at up to 1 m from the female. IV and IIB also reduce male catch in female-baited traps, but dicastalure does not. Recently mated females, confined with virgins, reduce male catch, thereby indicating release of an unknown inhibitor. When formulated in a suitable extender, such as corn-oil, dicastalure may be released from sealed polyethylene vials or from cellulose acetate cigarette filters, and inclusion of the antioxidant 2:6-di-tort-butyl-p-cresol (BHT) prolongs the attractiveness of 1 mg dicastalure formulations beyond 25–30 days. Release from polyethylene is more efficient than from either polypropylene or cellulose and moth catch over a five-week period is linearly related to the logarithm of pheromone concentration. Significant communication disruption, as measured by reduced trap catches of male Diparopsis, occurred when female-baited traps in 100 m2 cotton plots were surrounded by point sources of either dicastalure (synthetic females) or the inhibitory IIA acetate (anti-females). Since dicastalure is occasionally less attractive than virgin females, efforts are being made to improve pheromone slow release formulations.

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.

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