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F Allen Dray
Ecologist


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Introduction History of Rhodomyrtus tomentosa in southeastern USA - (Peer Reviewed Journal)
Additional host range testing of eucryptorrhynchus brandti (Coleoptera: Curculionidae) for the biological control of tree-of-heaven, ailanthus altissima (Simaroubaceae) in the U.S.A. - (Peer Reviewed Journal)
Mcavoy, T.J., Mays, R., Goldstein, S.L., Dray Jr, F.A., Yu, Z., Reardon, R., Salom, S.M. 2023. Additional host range testing of eucryptorrhynchus brandti (Coleoptera: Curculionidae) for the biological control of tree-of-heaven, ailanthus altissima (Simaroubaceae) in the U.S.A. Biocontrol Science and Technology. 1-26. https://doi.org/10.1080/09583157.2023.2294219.
Assessing the status of biological control of air potato (Dioscorea bulbifera) in the southeastern USA - (Peer Reviewed Journal)
Manrigue, V., Kraus, E., Schaffer, C., Diaz, R., Kelm, C., Poffenberger, R., Murray, R., Smith, M., Dray Jr, F.A., Leidi, J.G., Lake, E., Rayamajhi, M., Minteer, C., Mass, J.L., Hight, S.D. 2023. Assessing the status of biological control of air potato (Dioscorea bulbifera) in the southeastern USA. Biocontrol Science and Technology. (33)12:1173-1185. https://doi.org/10.1080/09583157.2023.2294207.
Effects of invasive plant haplotypes on a biological control agent (Lepidelphax pistiae) fecundity and impact - (Peer Reviewed Journal)
Goode, A.B., Tipping, P.W., Dray Jr, F.A., Valmonte, R.J., Knowles, B.K., Pokorny, E.N. 2023. Effects of invasive plant haplotypes on a biological control agent (Lepidelphax pistiae) fecundity and impact. Biocontrol Science and Technology. https://doi.org/10.1080/09583157.2023.2272229.
Agricultural Research Service weed science research: past, present, and future - ()
Young, S.L., Anderson, J.V., Baerson, S.R., Bajsa Hirschel, J.N., Blumenthal, D.M., Boyd, C.S., Boyette, C.D., Brennan, E.B., Cantrell, C.L., Chao, W.S., Chee Sanford, J.C., Clements, D.D., Dray Jr, F.A., Duke, S.O., Porter, K.M., Fletcher, R.S., Fulcher, M.R., Gaskin, J., Grewell, B.J., Hamerlynck, E.P., Hoagland, R.E., Horvath, D.P., Law, E.P., Madsen, J., Martin, D.E., Mattox, C.M., Mirsky, S.B., Molin, W.T., Moran, P.J., Mueller, R.C., Nandula, V.K., Newingham, B.A., Pan, Z., Porensky, L.M., Pratt, P.D., Price, A.J., Rector, B.G., Reddy, K.N., Sheley, R.L., Smith, L., Smith, M., Snyder, K.A., Tancos, M.A., West, N.M., Wheeler, G.S., Williams, M., Wolf, J.E., Wonkka, C.L., Wright, A.A., Xi, J., Ziska, L.H. 2023. Agricultural Research Service weed science research: past, present, and future. Weed Science. 71(4):312-327. https://doi.org/10.1017/wsc.2023.31.
Classical Biological Control of Air Potato Vine, Dioscorea bulbifera, Infestations in Florida - ()
Rayamajhi, M.B., Dray Jr, F.A. 2022. Classical Biological Control of Air Potato Vine, Dioscorea bulbifera, Infestations in Florida. Book Chapter. 288-299.
The phytogeography and genetic diversity of the weedy hydrophyte, Pistia stratiotes L. - (Peer Reviewed Journal)
Madeira, P.T., Dray Jr, F.A., Tipping, P.W. 2022. The phytogeography and genetic diversity of the weedy hydrophyte, Pistia stratiotes L. Biological Invasions. 60(5):685–69. https://doi.org/10.1093/sysbio/syr041.
Phenological synchrony between a weed (Dioscorea bulbifera) and a biocontrol agent (Lilioceris cheni) in the introduced range, Florida: implication in biological control - (Peer Reviewed Journal)
Rayamajhi, M.B., Rohrig, E., Lake, E.C., Smith, M., Pratt, P.D., Dray Jr, F.A., Halbritter, D.A., Leidi, J.G. 2021. Phenological synchrony between a weed (Dioscorea bulbifera) and a biocontrol agent (Lilioceris cheni) in the introduced range, Florida: implication in biological control. Biocontrol Science and Technology. 31(8):797–816. https://doi.org/10.1080/09583157.2021.1885627.
Weeding around the edges of the science of invasive plant management: biological control agent hybridization, apparent competition, and biotic resistance - (Abstract Only)
Potential for negative interactions between successful arthropod and weed biological control programs: a case study with Lilioceris species - (Peer Reviewed Journal)
Lake, E.C., Tewksbury, L., Smith, M., Dray Jr, F.A., Russell, A., Madeira, P.T., Rayamajhi, M.B., Casagrande, R. 2020. Potential for negative interactions between successful arthropod and weed biological control programs: a case study with Lilioceris species. Biological Control. 144. https://doi.org/10.1016/j.biocontrol.2020.104218.
A novel method for quantifying insect damage to plant storage organs - (Peer Reviewed Journal)
Dray Jr, F.A., Goldstein, S. 2019. A novel method for quantifying insect damage to plant storage organs. Entomologia Experimentalis et Applicata. 168(1):113-117. https://doi.org/10.1111/eea.12862.
Molecular identification of Azolla in the Yangtze River Watershed, China - (Peer Reviewed Journal)
Madeira, P.T., Dray Jr, F.A., Tipping, P.W. 2019. Molecular identification of Azolla in the Yangtze River Watershed, China. Aquatic Botany. 159. https://doi.org/10.1016/j.aquabot.2019.103149.
Preparing for release of the Asian leaf beetle, Lilioceris egena, a biological control of air potato (Dioscorea bulbifera) in Florida - (Abstract Only)
Herbivory by the biocontrol agent Lilioceris cheni suppresses propagule production and smothering ability of the invasive vine Dioscorea bulbifera - (Peer Reviewed Journal)
Rayamajhi, M.B., Rohrig, E., Leidi, J.G., Kerr, C., Salcedo, E., Poffenberger, R., Smith, M., Lake, E.C., Dray Jr, F.A., Pratt, P.D., Tipping, P.W., Center, T.D. 2019. Herbivory by the biocontrol agent Lilioceris cheni suppresses propagule production and smothering ability of the invasive vine Dioscorea bulbifera. Biological Control. 130:1-8. https://doi.org/10.1016/j.biocontrol.2018.12.001.
Plant phylogenetics inform efforts at biological control of Dioscorea bulbifera - (Abstract Only)
Will biological control agents of Lilioceris lilii, lily leaf beetle, parasitize congeneric weed biological control agents for air potato? - (Abstract Only)
Minimum threshold for establishment and dispersal of Lilioceris cheni (Coleoptera: Chrysomelide): a biological control agent of Dioscorea bulbifera - (Peer Reviewed Journal)
Lake, E.C., Smith, M., Rayamajhi, M.B., Pratt, P.D., Dray Jr, F.A. 2018. Minimum threshold for establishment and dispersal of Lilioceris cheni (Coleoptera: Chrysomelide): a biological control agent of Dioscorea bulbifera. Biocontrol Science and Technology. 28(6):603-613. https://doi.org/10.1080/09583157.2018.1468999.
Hybridization of two biotypes of Lilioceris cheni will not hinder biological control of air potato, Dioscorea bulbifera - (Abstract Only)
The role of melaleuca control in Everglades restoration: accomplishments and future plans - ()
Lake, E.C., Tipping, P.W., Rayamajhi, M.B., Pratt, P.D., Dray Jr, F.A., Wheeler, G.S., Purcell, M.F., Center, T.D. 2017. The role of melaleuca control in Everglades restoration: accomplishments and future plans. In: Van Driesche, R.G, Reardon, R.C., editors. Supressing over-abundant invasive plants and insects in natural areas by use of their specialized natural enemies. Morgantown, WV: Forest Health Technology Enterprise Team. p. 53-58.
The role of melaleuca control in Everglades restoration: accomplishments and future plans - ()
Lake, E.C., Tipping, P.W., Rayamajhi, M.B., Pratt, P.D., Dray Jr, F.A., Wheeler, G.S., Purcell, M.F., Center, T.D. 2017. The role of melaleuca control in Everglades restoration: accomplishments and future plans. Forest Health Technology Enterprise Team. 53-58.
Fidelity of the Asian beetle Lilioceris egena (Weise) to air potato (Dioscorea bulbifera L.) - ()
Does Lilioceris egena burrow for tubers - (Abstract Only)
Release and distribution of Lilioceris cheni (Coleoptera: Chrysomelidae), a biological control agent of air potato (Dioscorea bulbilfera: Dioscoreaceae), in Florida - (Peer Reviewed Journal)
Overholt, W.A., Rayamajhi, M.B., Rohrig, E., Hight, S.D., Dray Jr, F.A., Lake, E.C., Smith, M., Hibbard, K., Bhattarai, G., Bowers, K.E., Poffenberger, R., Clark, M., Curry, B., Stange, B., Calise, E., Wasylik, T.K., Martinez, C.M., Leidi, J.G. 2016. Release and distribution of Lilioceris cheni (Coleoptera: Chrysomelidae), a biological control agent of air potato (Dioscorea bulbilfera: Dioscoreaceae), in Florida. Biocontrol Science and Technology. 26:1087-1099.
Molecular identification of Azolla invasions in Africa: The Azolla specialist, Stenopelmus rufinasus proves to be an excellent taxonomist - (Peer Reviewed Journal)
Madeira, P.T., Hill, M.P., Dray Jr, F.A., Coetzee, J.A., Paterson, I.D., Tipping, P.W. 2016. Molecular identification of Azolla invasions in Africa: The Azolla specialist, Stenopelmus rufinasus proves to be an excellent taxonomist. South African Journal of Botany. 105:299-305.
The role of melaleuca control in Everglades restoration: accomplishments and future plans - (Abstract Only)
Ecological host-range of Lilioceris cheni (Coleoptera: Chrysomelidae), a biological control agent of Dioscorea bulbifera L. - (Peer Reviewed Journal)
Lake, E.C., Smith, M., Dray Jr, F.A., Pratt, P.D. 2015. Ecological host-range of Lilioceris cheni (Coleoptera: Chrysomelidae), a biological control agent of Dioscorea bulbifera L.. Biological Control. 85:18-24.
In the Eye of the Beholder: Waterhyacinth Management in Florida - (Peer Reviewed Journal)
Tipping, P.W., Martin, M.R., Pokorny, E.N., Nimmo, K.R., Fitzgerald, D.L., Dray Jr, F.A. 2014. In the Eye of the Beholder: Waterhyacinth Management in Florida. Biocontrol News and Information. 35,12.
Current levels of suppression of waterhyacinth in Florida by classical biological control agents - (Peer Reviewed Journal)
Tipping, P.W., Martin, M.R., Pokorny, E.N., Nimmo, K.R., Fitzgerald, D.L., Dray Jr, F.A. 2014. Current levels of suppression of waterhyacinth in Florida by classical biological control agents. Biological Control. 71:65-69.
Bottom-up effects on top-down regulation of a floating aquatic plant by two weevil species: the context-specific nature of biological control - (Peer Reviewed Journal)
Center, T.D., Dray Jr, F.A., Mattison, E.D., Tipping, P.W., Rayamajhi, M.B. Bottom-up effects on top-down regulation of a floating aquatic plant by two weevil species: the context-specific nature of biological control. Journal of Applied Ecology.51(3):814-824. 2014.
Host range validation, molecular identification, and release and establishment of a Chinese biotype of the Asian leaf beetle Lilioceris cheni (Coleoptera:Chrysomelidae:Criocerinae) for control of Dioscorea bulbifera L. in ... - (Peer Reviewed Journal)
Center, T.D., Rayamajhi, M., Dray, F.A., Madeira, P.M., Witkus, G., Rohrig, E., Mattison, E., Lake, E., Smith, M., Zhang, J., Purcell, M., Konstantinov, A., Schmitz, D. Host range validation, molecular identification, and release and establishment of a Chinese biotype of the Asian leaf beetle Lilioceris cheni (Coleoptera:Chrysomelidae:Criocerinae) for control of Dioscorea bulbifera L. in the southern United States. Biocontrol Science and Technology. 23(7):735-755. 2013.
Evidence of establishment of Bagous hydrillae Coleoptera: Curculionidae), a biological control agent of Hydrilla verticillata (Hydrocharitales: Hydirocharitaceae) in North America? - (Peer Reviewed Journal)
Center, T.D., Parys, K., Grodowitz, M., Wheeler, G.S., Dray Jr, F.A., O'Brien, C.W., Johnson, S., Cofrancesco, A. 2013. Evidence of establishment of Bagous hydrillae Coleoptera: Curculionidae), a biological control agent of Hydrilla verticillata (Hydrocharitales: Hydirocharitaceae) in North America?. Florida Entomologist. 96(1):180-186.
In situ estimates of waterhyacinth leaf tissue nitrogen using a SPAD-502 chlorophyll meter - (Peer Reviewed Journal)
Dray Jr, F.A., Center, T.D., Mattison, E. 2012. In situ estimates of waterhyacinth leaf tissue nitrogen using a SPAD-502 chlorophyll meter. Aquatic Botany. DOI: 10.1016/j.aquabot.2012.03.005.
Biological control of Melaleuca quinquenervia: an Everglades invader - (Peer Reviewed Journal)
Center, T.D., Purcell, M.F., Pratt, P.D., Rayamajhi, M.B., Tipping, P.W., Wright, S.A., Dray Jr, F.A. Biological control of Melaleuca quinquenervia: an Everglades invader. Biocontrol. 57(2):151-165.2012.
Host specificity assessment and potential impact of Megamelus scutellaris Berg (Hemiptera: Delphacidae) on waterhyacinth (Eichhornia crassipes Mart. Pontederiales: Pontederiaceae) - (Peer Reviewed Journal)
Tipping, P.W., Center, T.D., Sosa, A.J., Dray Jr, F.A. 2010. Host specificity assessment and potential impact of Megamelus scutellaris Berg (Hemiptera: Delphacidae) on waterhyacinth (Eichhornia crassipes Mart. (Solms) (Pontederiales: Pontederiaceae). Biocontrol Science and Technology. 21(1):75-87.
A Simple, Efficient Method for Extracting Neochetina eichhorniae and N. bruchi (Coleoptera: Curculionidae) from Waterhyacinth (Eichhornia crassipes: Pontederiaceae) - (Peer Reviewed Journal)
Center, T.D., Dray Jr, F.A. 2010. A Simple, Efficient Method for Extracting Neochetina eichhorniae and N. bruchi (Coleoptera: Curculionidae) from Waterhyacinth (Eichhornia crassipes: Pontederiaceae). Florida Entomologist. 93(2): 315-316.
Bottom-up control of water hyacinth weevil populations: Do the plants regulate the insects? - (Peer Reviewed Journal)
Center, T.D., Dray Jr, F.A. 2010. Bottom-up control of water hyacinth weevil populations: Do the plants regulate the insects?. Journal of Applied Ecology. 47, 329-337.
Effects of host quality on flight muscle development in Neochetina eichhornia and N bruchi (Coleoptera: Curculionidae) - (Peer Reviewed Journal)
Center, T.D., Dray Jr, F.A. 2010. Effects of host quality on flight muscle development in Neochetina eichhornia and N bruchi (Coleoptera: Curculionidae). Florida Entomologist. 93(2): 161-166.
Geographic distribution and regional impacts of Oxyops vitiosa (Coleoptera: Curculionidae) and Boreioglycaspis melaleucae (Hemiptera: Psyllidae), biological control agents of the invasive tree Melaleuca quinquenervia - (Peer Reviewed Journal)
Balentine, K.M., Pratt, P.D., Dray Jr, F.A., Rayamajhi, M.B., Center, T.D. Geographic distribution and regional impacts of Oxyops vitiosa (Coleoptera: Curculionidae) and Boreioglycaspis melaleucae (Hemiptera: Psyllidae), biological control agents of the invasive tree Melaleuca quinquenervia. Environmental Entomology. 38(4):1145-1154. 2009.
Concordance between life history traits, invasion history, and allozyme diversity of the Everglades invader Melaleuca quinquenervia - (Peer Reviewed Journal)
Dray Jr, F.A., Hale, R.E., Madeira, P.T., Bennett, B.C., Center, T.D. 2008. Concordance between life history traits, invasion history, and allozyme diversity of the Everglades invader Melaleuca quinquenervia. Aquatic Botany. 90(4):296-302. 2009.
Selection on herbivory resistance and growth rate in an invasive plant - (Peer Reviewed Journal)
Franks, S.J., Pratt, P.D., Dray Jr, F.A., Simms, E.L. 2008. Selection on herbivory resistance and competitive ability traits in an invasive plant. The American Naturalist, Vol. 171, No. 5, pp. 678-691.
NO EVOLUTION OF INCREASED COMPETITIVE ABILITY OR DECREASED ALLOCATION TO DEFENSE IN MELALEUCA QUINQUENERVIA SINCE RELEASE FROM NATURAL ENEMIES. - (Peer Reviewed Journal)
Franks, S.D., Pratt, P.D., Dray Jr, F.A., Simms, E. 2008. No evolution of increased competitive ability or decreased allocation to defense in melaleuca quinquenervia since release from natural enemies.. Biological Invasions 10(4): 455-466. (published online: Aug 2007)
No evolution of increased competitive ability or decreased allocation to defense in Melaleuca quinquenervia since release from natural enemies - (Peer Reviewed Journal)
Franks, S.J., Pratt, P.D., Dray Jr, F.A., Simms, E.L. 2008. No evolution of increased competitive ability or decreased allocation to defense in Melaleuca quinquenervia since release from natural enemies. Biological Invasions. 10(4):455-466.
No evolution of increased competitive ability or decreased allocation to defense in Melaleuca quinquenervia since release from natural enemies - (Peer Reviewed Journal)
Franks, S.J., Pratt, P.D., Dray Jr, F.A., Simms, E.L. 2007. No evolution of increased competitive ability or decreased allocation to defense in Melaleuca quinquenervia since release from natural enemies. Biological Invasions. 10:455-466.
Initial impacts and field validation of host range for Boreioglycaspis melaleucae Moore (Hemiptera: Psyllidae),a biological control agent of the invasive tree Melaleuca quinquenervia (Cav.) Blake (Myrtales: Myrtaceae: Leptosp - (Peer Reviewed Journal)
Center, T.D., Pratt, P.D., Tipping, P.W., Rayamajhi, M.B., Van, T.K., Dray Jr., F.A., Wright, S.A. Initial impacts and field validation of host range for Boreioglycaspis melaleucae Moore (Hemiptera: Psyllidae),a biological control agent of the invasive tree Melaleuca quinquenervia (Cav.) Blake (Myrtales: Myrtaceae: Leptospermoideae. Environmental Entomology. 36(3):569-576. 2007.
Field colonization, population growth, and dispersal of Boreioglycaspis melaleucae Moore, a biological control agent of the invasive tree Melaleuca quinquenervia (Cav.) Blake - (Peer Reviewed Journal)
Center, T.D., Pratt, P.D., Tipping, P.W., Rayamajhi, M.B., Van, T.K., Wineriter, S.A., Dray Jr., F.A., Purcell, M. Field colonization, population growth, and dispersal of Boreioglycaspis melaleucae Moore, a biological control agent of the invasive tree Melaleuca quinquenervia (Cav.) Blake. Biological Control. 39:363-374. 2006.
INVASION HISTORY OF MELALEUCA QUINQUENERVIA (CAV.) S.T. BLAKE IN FLORIDA - (Peer Reviewed Journal)
Dray Jr, F.A., Bennett, B.C., Center, T.D. 2006. Invasion history of melaleuca quinquenervia (cav.) S.T. Blake in Florida. Castanea. 71(3): 210-225.
Herbivory alters competitive interactions between two invasive aguatic plants - (Peer Reviewed Journal)
Center, T.D., Van, T.K., Dray Jr., F.A., Franks, S.J., Rebelo, M.T., Pratt, P.D., Rayamajhi, M.B. Herbivory alters competitive interactions between two invasive aguatic plants. Biological Control. 33:173-185. 2005.
GENETIC VARIATION IN MELALEUCA QUINQUENERVIA AFFECTS THE BIOCONTROL AGENT OXYOPS VITIOSA - (Peer Reviewed Journal)
Dray Jr, F.A., Bennett, B.C., Center, T.D., Wheeler, G.S., Madeira, P.T. 2004. Genetic variation in melaleuca quinquenervia affects the biocontrol agent Oxyops vitiosa. Weed Technology. 18: 1400-1402.
GENETIC VARIATION IN MELALEUCA QUINQUENERVIA AFFECTS THE BIOCONTROL AGENT OXYOPS VITIOSA - (Peer Reviewed Journal)
Dray Jr, F.A., Bennett, B.C., Center, T.D., Wheeler, G.S., Madeira, P.T. 2004. GENETIC VARIATION IN MELALEUCA QUINQUENERVIA AFFECTS THE BIOCONTROL AGENT OXYOPS VITIOSA. Weed Technology. 18:1400-1402. 2004.
SELECTION FOR RESISTANCE IN INVASIVE PLANTS - (Peer Reviewed Journal)
Franks, S.J., Pratt, P.D., Dray Jr, F.A., Simms, E.L. 2004. Selection for resistance in invasive plants. Weed Technology.
GOING WILD FROM DOWN UNDER: MELALEUCA QUINQUENERVIA INVADES THE EVERGLADES - (Proceedings)
Dray Jr, F.A., Bennett, B.C., Center, T.D. 2004. Going wild from down under: melaleuca quinquenervia invades the everglades. Meeting Abstract.
NATURAL ENEMY ESCAPE AND THE EVOLUTION OF HERBIVORY RESISTANCE IN THE INVASIVE PLANT MELALEUCA QUINQUENERVIA - (Proceedings)
Franks, S.J., Pratt, P.D., Dray Jr, F.A., Simms, E.L. 2004. Natural enemy escape and the evolution of herbivory resistance in the invasive plant melaleuca quinquenervia. Gordon Research Conference Proceedings.
THE ROLE OF BIOCONTROL IN INTEGRATED WEED MANAGEMENT - (Proceedings)
Center, T.D., Van, T.K., Pratt, P.D., Tipping, P.W., Rayamajhi, M.B., Franks, S.J., Dray Jr, F.A. The role of biocontrol in integrated weed management. Meeting Abstract.
VARIATION AMONG MELALEUCA QUINQUENERVIA (MYRTACEAE) POPULATIONS IN FLORIDA AND ITS INFLUENCE ON PERFORMANCE OF THE BIOLOGICAL CONTROL AGENT OXYOPS VITIOSA (COLEOPTERA: CURCULIONIDAE) - (Proceedings)
Dray Jr, F.A. 2003. Variation among melaleuca quinquenervia (myrtaceae) populations in florida and its influence on performance of the biological control agent oxyops vitiosa (coleoptera: curculionidae). Joint Conference on the Science and Restoration of the Greater Everglades and Florida Bay Ecosystem.
BIOLOGICAL CONTROL OF INVASIVE PLANTS IN EVERGLADES ECOSYSTEMS - (Proceedings)
Center, T.D., Dray Jr, F.A. 2003. Biological control of invasive plants in everglades ecosystems. Joint Conference on the Science and Restoration of the Greater Everglades and Florida Bay Ecosystem.
DOES HERBIVORY SELECT FOR RESISTANT GENOTYPES OF THE INVASIVE TREE MELALEUCA QUINQUENERVIA? - (Proceedings)
Franks, S.J., Pratt, P.D., Dray Jr, F.A., Simms, E.L. 2003. Does herbivory select for resistant genotypes of the invasive tree melaleuca quinquenervia?. The 7th International Conference on the Ecology and Management of Alien Plant Invasions.
COMPETITION EXPERIMENTS FOR PRE-RELEASE EVALUATION OF THE POTENTIAL EFFICACY OF NEW BIOLOGICAL CONTROL AGENTS - (Proceedings)
Center, T.D., Van, T.K., Rebelo, T., Dray Jr, F.A., Pratt, P.D., and Rayamajhi, M.B. 2004. Competition experiments for pre-release evaluation of the potential efficacy of new biological control agents. In: Proceedings of the XI International Symposium on Biological Control of Weeds (eds. J. M. Cullen, D. T. Briese, D. J. Kriticos, W. M. Lansdale, L. Marin, and J. K. Scott), pp. 222-223. CSIRO Entomolgy, Canberra, Australia. Meeting Abstract.
WATERLETTUCE - ()
Dray Jr, F.A. 2004. WATERLETTUCE. Biological Control of Invasive Plants in the United States. 65-78 (Book Chapter) 2004.