{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,23]],"date-time":"2026-08-23T18:12:19Z","timestamp":1787508739288,"version":"build-2736575974"},"reference-count":47,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2025,5,28]],"date-time":"2025-05-28T00:00:00Z","timestamp":1748390400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"USDA NIFA SCRI","award":["#2021-51181-35863"],"award-info":[{"award-number":["#2021-51181-35863"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Insects"],"abstract":"<jats:p>Ambrosia beetles (Coleoptera: Curculionidae: Scolytinae) in the tribe Xyleborini are economically important pests of woody ornamentals, tree nuts, and fruit orchards, including pecans in the United States. Among them, the granulate ambrosia beetle, Xylosandrus crassiusculus (Motschulsky), is the most common species in pecan orchards in Georgia. Various traps, including ethanol-mediated Lindgren multi-funnel traps, panel traps, bottle traps, sticky cards, and ethanol-infused wooden bolts, are used in ambrosia beetle monitoring programs. Trap color and placement height are important factors that increase trap effectiveness. To improve trap effectiveness for ambrosia beetles, we conducted a color and height preference experiment under field conditions using six different colored sticky cards, including black, blue, green, red, transparent, and yellow, placing them at three different heights (15, 60, and 120 cm from ground level). The results show that red and transparent sticky cards consistently captured a higher number of ambrosia beetles, whereas yellow-colored sticky cards consistently captured a lower number of ambrosia beetles compared to all other tested colors of sticky cards. A similar trend was observed with X. crassiusculus in field and laboratory settings. Among the evaluated trap heights, more ambrosia beetles, including X. crassiusculus, were consistently captured in the sticky cards placed at a height of 60 cm from the ground surface. Additionally, we monitored natural infestations of ambrosia beetles in commercial pecan orchards in Georgia and found more damage to pecan trees near the ground surface (45 cm) compared to the upper parts. We also recorded three ambrosia beetle species, X. crassiusculus, the black stem borer, X. germanus (Blandford), and the Southeast Asian ambrosia beetle, Xylosandrus amputatus (Blandford). Among them, X. crassiusculus (90.50%) was the most abundant species in the pecan orchards. Therefore, red and transparent sticky cards placed at a height of 45 to 60 cm could improve the trap efficacy and can be used for monitoring ambrosia beetles in pecan orchards.<\/jats:p>","DOI":"10.3390\/insects16060569","type":"journal-article","created":{"date-parts":[[2025,5,28]],"date-time":"2025-05-28T08:12:47Z","timestamp":1748419967000},"page":"569","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Effects of Trap Color and Placement Height on the Capture of Ambrosia Beetles in Pecan Orchards"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2915-3361","authenticated-orcid":false,"given":"Rajendra","family":"Acharya","sequence":"first","affiliation":[{"name":"Department of Entomology, University of Georgia, Tifton, GA 31793, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4794-0070","authenticated-orcid":false,"given":"Shivakumar","family":"Veerlapati","sequence":"additional","affiliation":[{"name":"Department of Entomology, University of Georgia, Tifton, GA 31793, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7362-3741","authenticated-orcid":false,"given":"Madhav","family":"Koirala","sequence":"additional","affiliation":[{"name":"Department of Entomology, University of Georgia, Tifton, GA 31793, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrew","family":"Sawyer","sequence":"additional","affiliation":[{"name":"University of Georgia Extension, Statesboro, GA 30458, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8309-9998","authenticated-orcid":false,"given":"Apurba K.","family":"Barman","sequence":"additional","affiliation":[{"name":"Department of Entomology, University of Georgia, Tifton, GA 31793, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,5,28]]},"reference":[{"key":"ref_1","unstructured":"United States Department of Agriculture National Agricultural Statistics Service (USDA-NASS) (2024, December 16). Pecan Production. Available online: https:\/\/downloads.usda.library.cornell.edu\/usda-esmis\/files\/5425kg32f\/nv936p236\/00001m546\/pecnpr24.pdf."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1","DOI":"10.48130\/tihort-0024-0030","article-title":"The effects of freezing and stratification on pecan (Carya illinoinensis) seed germination and seedling growth","volume":"5","author":"Wang","year":"2025","journal-title":"Technol. Hortic."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"57","DOI":"10.1007\/s10340-003-0030-5","article-title":"Abundance and distribution of Xylosandrus germanus (Blandford 1894) (Coleoptera, Scolytidae) in Belgium: New observations and an attempt to outline its range","volume":"77","author":"Henin","year":"2004","journal-title":"J. Pest Sci."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Ranger, C.M., Schultz, P.B., Frank, S.D., Chong, J.H., and Reding, M.E. (2015). Non-native ambrosia beetles as opportunistic exploiters of living but weakened trees. PLoS ONE, 10.","DOI":"10.1371\/journal.pone.0131496"},{"key":"ref_5","unstructured":"Acebes-Doria, A. (2025, February 05). Insect Update: Ambrosia Beetles. UGA Pecan Extension. Available online: https:\/\/site.extension.uga.edu\/pecan\/2019\/01\/insect-update-ambrosia-beetles\/."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"103","DOI":"10.4039\/tce.2020.51","article-title":"Semiochemical-mediated host selection by Xylosandrus spp. ambrosia beetles (Coleoptera: Curculionidae) attacking horticultural tree crops: A review of basic and applied science","volume":"153","author":"Ranger","year":"2021","journal-title":"Can. Entomol."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"998","DOI":"10.1093\/ee\/nvac064","article-title":"Ambrosia beetle occurrence and phenology of Xylosandrus spp. (Coleoptera: Curculionidae: Scolytinae) in ornamental nurseries, tree fruit, and pecan orchards in Georgia","volume":"51","author":"Monterrosa","year":"2022","journal-title":"Environ. Entomol."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"122106","DOI":"10.1016\/j.foreco.2024.122106","article-title":"Simulated flood-stress and X-ray tomography unveil susceptibility of different tree taxa to ambrosia beetles","volume":"568","author":"Santoiemma","year":"2024","journal-title":"For. Ecol. Manag."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"9","DOI":"10.1093\/jipm\/pmw005","article-title":"Biology, ecology, and management of nonnative ambrosia beetles (Coleoptera: Curculionidae: Scolytinae) in ornamental plant nurseries","volume":"7","author":"Ranger","year":"2016","journal-title":"J. Integr. Pest Manag."},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Rassati, D., Faccoli, M., Haack, R.A., Rabaglia, R.J., Petrucco Toffolo, E., Battisti, A., and Marini, L. (2016). Bark and ambrosia beetles show different invasion patterns in the USA. PLoS ONE, 11.","DOI":"10.1371\/journal.pone.0158519"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"615","DOI":"10.1007\/s10340-021-01382-3","article-title":"Recent advances toward the sustainable management of invasive Xylosandrus ambrosia beetles","volume":"94","author":"Gugliuzzo","year":"2021","journal-title":"J. Pest Sci."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1647","DOI":"10.1093\/jee\/toab089","article-title":"Effects of trap and ethanol lure type and age on attraction of ambrosia beetles (Coleoptera: Curculionidae)","volume":"114","author":"Monterrosa","year":"2021","journal-title":"J. Econ. Entomol."},{"key":"ref_13","first-page":"2","article-title":"A new pest in greenhouse grown grape stems","volume":"25","author":"Felt","year":"1932","journal-title":"J. Econ. Entomol."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"143","DOI":"10.1163\/22941932-90000294","article-title":"Effects of ambrosia beetle attack on Cercis canadensis","volume":"23","author":"Dute","year":"2002","journal-title":"IAWA J."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"753","DOI":"10.1093\/jee\/toy413","article-title":"Trap tree and interception trap techniques for management of ambrosia beetles (Coleoptera: Curculionidae: Scolytinae) in nursery production","volume":"112","author":"Addesso","year":"2019","journal-title":"J. Econ. Entomol."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"285","DOI":"10.1146\/annurev-ento-031616-035105","article-title":"The ambrosia symbiosis: From evolutionary ecology to practical management","volume":"62","author":"Hulcr","year":"2017","journal-title":"Annu. Rev. Entomol."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"3141","DOI":"10.1007\/s10530-017-1514-1","article-title":"Ecology of forest insect invasions","volume":"19","author":"Brockerhoff","year":"2017","journal-title":"Biol. Invasions"},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Ranger, C.M., Werle, C.T., Schultz, P.B., Addesso, K.M., Oliver, J.B., and Reding, M.E. (2019). Long-lasting insecticide netting for protecting tree stems from attack by ambrosia beetles (Coleoptera: Curculionidae: Scolytinae). Insects, 11.","DOI":"10.3390\/insects11010008"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"675","DOI":"10.1007\/s10530-014-0758-2","article-title":"Ubiquitous volatile compound facilitates efficient host location by a non-native ambrosia beetle","volume":"17","author":"Ranger","year":"2015","journal-title":"Biol. Invasions"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"327","DOI":"10.1111\/afe.12062","article-title":"Conophthorin enhances the electroantennogram and field behavioural response of Xylosandrus germanus (Coleoptera: Curculionidae) to ethanol","volume":"16","author":"Ranger","year":"2014","journal-title":"Agric. For. Entomol."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1476","DOI":"10.1093\/jee\/toae145","article-title":"Comparison of ethanol-baited trap designs for ambrosia beetles in orchards in the eastern United States","volume":"117","author":"Tobin","year":"2024","journal-title":"J. Econ. Entomol."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"181","DOI":"10.1111\/j.1439-0418.1997.tb01390.x","article-title":"Trapping of the coffee berry borer Hypothenemus hampei Ferr. (Col., Scolytidae) within a mesh-enclosed environment: Interaction of olfactory and visual stimuli","volume":"121","author":"Mathieu","year":"1997","journal-title":"J. Appl. Entomol."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"743","DOI":"10.1603\/EN12341","article-title":"The redbay ambrosia beetle (Coleoptera: Curculionidae: Scolytinae) uses stem silhouette diameter as a visual host-finding cue","volume":"42","author":"Mayfield","year":"2013","journal-title":"Environ. Entomol."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Govindaraju, R., and Joseph, S.V. (2025). Effects of purple and green-colored bottle traps on captures of ambrosia beetles in ornamental nurseries. Agronomy, 15.","DOI":"10.3390\/agronomy15010105"},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"Cavaletto, G., Faccoli, M., Marini, L., Spaethe, J., Magnani, G., and Rassati, D. (2020). Effect of trap color on captures of bark-and wood-boring beetles (Coleoptera; Buprestidae and Scolytinae) and associated predators. Insects, 11.","DOI":"10.3390\/insects11110749"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"e6","DOI":"10.4039\/tce.2024.50","article-title":"Relative effects of black, purple, and green multiple-funnel traps on catches of arboreal and saproxylic beetles in forest understoreys","volume":"157","author":"Miller","year":"2025","journal-title":"Can. Entomol."},{"key":"ref_27","first-page":"373","article-title":"Ambrosia beetle (Coleoptera: Curculionidae: Scolytinae) captures using colored traps in southeast Tennessee and south Mississippi","volume":"49","author":"Werle","year":"2014","journal-title":"J. Entomol. Sci."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"501","DOI":"10.1603\/EC10263","article-title":"Effect of trap type, trap position, time of year, and beetle density on captures of the redbay ambrosia beetle (Coleoptera: Curculionidae: Scolytinae)","volume":"104","author":"Hanula","year":"2011","journal-title":"J. Econ. Entomol."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1003","DOI":"10.1653\/024.095.0428","article-title":"Effect of trap size, trap height and age of lure on sampling Xyleborus glabratus (Coleoptera: Curculionidae: Scolytinae), and its flight periodicity and seasonality","volume":"95","author":"Brar","year":"2012","journal-title":"Fla. Entomol."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"85","DOI":"10.24266\/0738-2898-28.2.85","article-title":"Monitoring flight activity of ambrosia beetles in ornamental nurseries with ethanol-baited traps: Influence of trap height on captures","volume":"28","author":"Reding","year":"2010","journal-title":"J. Environ. Hortic."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"253","DOI":"10.1007\/s10340-017-0883-7","article-title":"Trap height considerations for detecting two economically important forest beetle guilds in southeastern US forests","volume":"92","author":"Ulyshen","year":"2019","journal-title":"J. Pest Sci."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"327","DOI":"10.1007\/s10340-018-1026-5","article-title":"Vertical and horizontal distribution of bark and woodboring beetles by feeding guild: Is there an optimal trap location for detection?","volume":"92","author":"Sheehan","year":"2019","journal-title":"J. Pest Sci."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"1120","DOI":"10.1093\/ee\/nvx133","article-title":"Trap style, bait, and height deployments in black walnut tree canopies help inform monitoring strategies for bark and ambrosia beetles (Coleoptera: Curculionidae: Scolytinae)","volume":"46","author":"Klingeman","year":"2017","journal-title":"Environ. Entomol."},{"key":"ref_34","first-page":"273","article-title":"Trap height affects catches of bark and woodboring beetles (Coleoptera: Curculionidae, Cerambycidae) in baited multiple-funnel traps in Southeastern United States","volume":"113","author":"Miller","year":"2020","journal-title":"J. Econ. Entomol."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"2745","DOI":"10.1093\/jee\/toaa181","article-title":"Maximizing bark and ambrosia beetle (Coleoptera: Curculionidae) catches in trapping surveys for longhorn and jewel beetles","volume":"113","author":"Marchioro","year":"2020","journal-title":"J. Econ. Entomol."},{"key":"ref_36","unstructured":"Baker, J.R., LaBonte, J., Atkinson, T.H., and Bambara, S. (2025, April 18). An Identification Tool for Bark Beetles for the Southeastern United States. Available online: https:\/\/keys.lucidcentral.org\/keys\/v3\/bark_beetles\/whole_site_media\/Beetle%20Key%20home.htm."},{"key":"ref_37","unstructured":"Bateman, C., and Hulcr, J. (2025, April 18). A Guide to Florida\u2019s Common Bark and Ambrosia Beetles. IFAS Extension and University of Florida, FOR321, 2017; pp. 1\u201332. Available online: https:\/\/edis.ifas.ufl.edu\/publication\/FR389."},{"key":"ref_38","unstructured":"Smith, S.M., Beaver, R.A., Cognato, A.I., Hulcr, J., and Redford, A.J. (2019). Southeast Asian Ambrosia Beetle ID, USDA APHIS Identification Technology Program (ITP) and Michigan State University."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"1","DOI":"10.18637\/jss.v067.i01","article-title":"Fitting linear mixed-effects models using lme4","volume":"67","author":"Bates","year":"2015","journal-title":"J. Stat. Softw."},{"key":"ref_40","unstructured":"Lenth, R.V. (2025, February 05). emmeans: Estimated Marginal Means, aka Least-Squares Means; R Package, Version 1.7.3. Available online: https:\/\/CRAN.R-project.org\/package=emmeans."},{"key":"ref_41","unstructured":"R Core Team (2024). R: A Language and Environment for Statistical Computing, R Foundation for Statistical Computing."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"378","DOI":"10.32614\/RJ-2017-066","article-title":"glmmTMB balances speed and flexibility among packages for zero-inflated generalized linear mixed modeling","volume":"9","author":"Brooks","year":"2017","journal-title":"R J."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"1115","DOI":"10.1093\/jee\/tov014","article-title":"Simple and efficient trap for bark and ambrosia beetles (Coleoptera: Curculionidae) to facilitate invasive species monitoring and citizen involvement","volume":"108","author":"Steininger","year":"2015","journal-title":"J. Econ. Entomol."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"2017","DOI":"10.1603\/EC11119","article-title":"Optimizing ethanol-baited traps for monitoring damaging ambrosia beetles (Coleoptera: Curculionidae, Scolytinae) in ornamental nurseries","volume":"104","author":"Reding","year":"2011","journal-title":"J. Econ. Entomol."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"65","DOI":"10.1300\/J492v07n03_07","article-title":"Monitoring of ambrosia bark beetle through installation of sticky color traps at different heights in mango trees","volume":"7","author":"Abbasi","year":"2008","journal-title":"Int. J. Fruit Sci."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"553","DOI":"10.1111\/j.1600-0706.2009.16761.x","article-title":"Additive and synergistic integration of multimodal cues of both hosts and non-hosts during host selection by woodboring insects","volume":"118","author":"Campbell","year":"2009","journal-title":"Oikos"},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"2407","DOI":"10.1093\/jee\/toaa175","article-title":"Effects of food bait and trap type on captures of Rhynchophorus palmarum (Coleoptera: Curculionidae) and trap bycatch in southern California","volume":"113","author":"Hoddle","year":"2020","journal-title":"J. Econ. Entomol."}],"container-title":["Insects"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2075-4450\/16\/6\/569\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T17:42:06Z","timestamp":1760031726000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2075-4450\/16\/6\/569"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,5,28]]},"references-count":47,"journal-issue":{"issue":"6","published-online":{"date-parts":[[2025,6]]}},"alternative-id":["insects16060569"],"URL":"https:\/\/doi.org\/10.3390\/insects16060569","relation":{},"ISSN":["2075-4450"],"issn-type":[{"value":"2075-4450","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,5,28]]}}}