Skip to Main Content
Evaluation of traps used to monitor southern pine beetle aerial populations and sex ratiosAuthor(s): James T. Cronin; Jane L. Hayes; Peter Turchin
Source: Agricultural and Forest Entomology 2:69-76
Publication Series: Scientific Journal (JRNL)
PDF: View PDF (140.17 KB)
- Various kinds of traps have been employed to monitor and forecast population trends of the southern pine beetle (Dendroctonus frontalis Zimmermann; Coleoptera: Scolytidae), but their accuracy in assessing pine-beetle abundance and sex ratio in the field has not been evaluated directly.
- In trus study, we used fluorescent powder to mark pine beetles emerging from six isolated infestations. We then compared estimates of total abundances and proportions of males emerging from within each infestation to the estimates from three types of traps: passive sticky traps (2, 5, 10 and 20m away from the source of beetles), multi-funnel traps baited with pine beetle attractants (100m away) and pine trees baited with attractants (also 100m away).
- We found that the proportion of males captured in traps was significantly affected by the type of trap used.
- Within an infestation, equal proportions of males and females were marked (0.53 ± 0.02 males; mean ± SE), but the proportions captured in trap trees and passive traps were more female biased (0.42 ± 0.03 and 0.46 ± 0.01 males, respectively). On the other hand, funnel traps provided an estimate of the proportion of males that was nearly identical to the proportion from within infestations (0.51 ± 0.03).
- Numbers of marked beetles captured in traps were uncorrelated with the numbers of marked beetles emerging from the focal infestations. This suggests that traps positioned around an infestation may not be effective at estimating relative abundances of beetles within the infestation.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationCronin, James T.; Hayes, Jane L.; Turchin, Peter. 2000. Evaluation of traps used to monitor southern pine beetle aerial populations and sex ratios. Agricultural and Forest Entomology 2:69-76.
KeywordsBark beetles, Dendroctonus frontalis, dispersal, insect traps, markrelease-recapture, population monitoring
- Repellent properties of the host compound 4-allylanisole to the southern pine beetle
- Spatial displacement of release point can enhance activity of an attractant pheromone synergist of a bark beetle.
- A nondestructive trap for Dendroctonus frontalis Zimmerman (Coleoptera: Scolytidae)
XML: View XML