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hong cheng
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Biological Control of Weeds in the West Field Guide
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Theodor D. Leininger
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Sthephen A. Lewis
Pest and Diseases Image Library
François Lieutier
Larry Line
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Houping Liu
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Ladd Livingston
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Howard F. Schwartz & Mark S. McMillan
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Julio Medal
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Tim Murphy
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Louis-Michel Nageleisen
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Gino Nearns
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Dragan Nestorovic
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Carol J Nichols
Tom Nichols
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David G. Nielsen
Jamie Nielsen
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April Noble
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M. Nuorteva
Victoria Nuzzo
Bob Oakes
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Lori Oberhofer
I.G. (Hardi) Oberholzer
Joseph O'Brien
Jim Occi
Ohio State Univ Ohio Ag. research & Development Center
Richard Old
Forrest L. Oliveria
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Merle Shepard, Gerald R.Carner, and P.A.C Ooi
Mike Ostry
Russ Ottens
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C. Paetel
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Zhihong Pan
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Devon Pfeiffer
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USDA ARS Photo Unit
L.S. Pickard
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P.G. Psallidas
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Min B. Rayamajhi
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Perry Rech
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Jacques Regad
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Laurie Reid
Forest Research
Rusty Rhea
Byron Rhodes
Barry Rice
Robert D. Richard
Bob Richard
Amy Richard
Robert J. Richardson
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Robert Richardson
James A. Richmond
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Frank M. Riley, Jr.
Kristen Riolo
Lance S. Risley
D. Ritchie
Carole Ritchie
Dr. Shabbir Rizvi
Gabriele & Hermann Robels
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C.E. Taylor and W.M. Robertson
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Mark Robinson
Laird Robinson
David G. Robinson
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Cindy Roche
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Van Waters and Rogers
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M Scott
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O.P. Sharma
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Jijing Song and Juan Shi
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William (Bill) Shuster
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Britt Slattery
Clemson University - USDA Cooperative Extension Slide Series
R.J. Reynolds Tobacco Company Slide Set
Tracey Slotta
James Smith
Richard Smith
James W. Smith
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Tony Smith
tia smith
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Heidi Snell
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Terry L Spivey
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Jason D. Stanley
Forest & Kim Starr
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Steven Steele
Allen C. Steere
Chris Steiner
Peter Stephen
David Stephens
Fabio Stergulc
R.E. Stevens
Scott Stewart
Robert Stewart
Cathy Stewart
Jim Stimmel
Gary M. Stolz
John Stommel
Doug Stone
Malcolm Storey
Jim Story
Ronald Stroessner
Massimo Stroppa
Connie Strunk
Kurt Stueber
Brian Sugarman
Daniel R. Suiter
Brian Sullivan
N. Wortson Summer
Ivan Sutila
Jil M. Swearingen
Curtis Swift
Csaba Szaboky
Nava Tabak
P.W. Talboys
Janco Tanis
Les Tanner
A.L. Taylor
Kevin Taylor
Jane Taylor
Dennis Teague
Louis Tedders
David Teem
Dan Tenaglia
Lisa Tewksbury
Robert C. Thatcher
Michael C. Thomas
Paul Thomas
Holly Thornton
Howard Thresher
Tim Tigner
Borys M. Tkacz
Barbara Tokarska-Guzik
John R. Tolliver
Marylin Tomkins
J. Tomminen
Susan Trammell
Kristine Travis
John Triana
H.H. Triantaphyllou
Ian Trueman
Mandy Tu
Sally Tucker
Scott Tunnock
Richard Turcotte
Susan Turner
Charles Turner
Beverly Turner
J.J. Tuset
A.J. Ullstrup
Photographer Unknown
USDA-ARS
Erich G. Vallery
M.A. van den Berg
A. van Frankenhuijzen
Andrea Van Loan
S.P. van Vuuren
Jacob Vance
Jeff Vanuga
Tim Varnedore
K. Venn
Didier Vincenot
Ferenc Viranyi
David Voegtlin
Theirry Vrain
Dale Wade
Art Wagner
Warren L. Wagner
Art Wagner
E. Bradford Walker
D.G. Walkey
V.R. Wallen
Jim Walters
Angela Walther
Roger Ward
James Denny Ward
Debbie Waters
A. Burns Weathersby
Biological Control: A Guide of Natural Enemies of North America Web Site
Richard Webb
Steve Webb
Theodore Webster
Ron Weeks
Dr. Weidemann
John A. Weidhass
Keith Weller
Lenny Wells
Rohan Wells
J.C. Wells
Jamie Welsh
R. Werner
Darrell Wesenberg
Rick West
Michael West
Randy Westbrooks
Paul Weston
Phil Westra
Gerald Wheeler
William White
Anthony D. White
David Williams
Karen Williams
Marisa Williams
Ralph Williams
Ralph Williams
John A. Williams
Max Williamson
Wayne Williamson
Jean L. Williams-Woodward
Linda Wilson
Jill Wilson
Dave Wilson
Doug Wilson
Jeffrey Wilson
Susan Wineriter
Peter Wirtz
Billy R. Wiseman
Robert F. Wittwer
Gil Wojciech
Daniel Wojcik
Herb Womack
Roy Wood
Rachel Woodfield
Paul Wray
Natasha Wright
John Wrigley
Yun Wu
Bart Wursten
UConn Plant Database www.hort.uconn.edu/plants
John Yablonsky
Camilla B. Yandoc
Yuri Yashin
Harry O. Yates III
Carroll E. Younce
Nicolina Zambone
Shep Zedaker
Gabriella Zilahi-Balogh
W.G. Ziller
Roberta Zimmerman
Milan Zubrik
Ulrich Zunke
Subject Search:
Select One
'Akepa (Loxops coccineus)
'Apapane (Himatione sanguinea)
'Elepaio (Chasiempis sandwichensis)
'I'iwi (Vestiaria coccinea)
'ohi'a lehua (Metrosideros polymorpha)
'Oma'o (Myadestes obscurus)
^^fall color
2007 Georgia wildfires
Aaron's beard (Hypericum calycinum)
Abbott's sawfly (Neodiprion abbottii)
Abbott's sphinx (Sphecodina abbottii)
abortive Entoloma (Entoloma abortivum)
absinth wormwood (Artemisia absinthium)
abstruse false looper (Syngrapha abstrusa)
Abyssinian ground hornbill (Bucorvus abyssinicus)
acacia (Acacia spp.)
acacia-ants (Pseudomyrmex ferrugineus)
Acantholyda sawflies (Acantholyda spp.)
achemon sphinx (Eumorpha achemon)
acorn and nut weevils (Curculio spp.)
acorn jay (Garrulus glandarius)
acorn weevil (Curculio nucum)
acorn-plum gall (Amphibolips quercusjuglans)
Acrolepia moths (Acrolepia spp.)
acuminate brachythecium moss (Brachythecium acuminatum)
acuminate scale (Kilifia acuminata)
adana tip moth (Rhyacionia adana)
addersmeat (Stellaria holostea)
adelgid (Dreyfusia merkeri)
adelgid (Adelges viridis)
adelgid (Dreyfusia nordmannianae)
admes spider mite (Eurytetranychus admes)
aerial yellowjacket (Dolichovespula arenaria)
Africa
African black rhinoceros (Diceros bicornis)
African boxthorn (Lycium ferrocissimum)
African broadbill (Smithornis capensis)
African Elephant (Loxodonta africana)
African feathergrass (Pennisetum macrourum)
African goshawk (Accipiter tachiro)
African ground hornbill (Bucorvus leadbeateri)
African hill babbler (Pseudoalcippe abyssinica)
African juniper (Juniperus procera)
African Land Snail (Achatina albopicta)
African Land Snail (Archachatina marginata)
African Land Snail (Archachatina marginata)
African Land Snail (Archachatina puylaepti)
African Land Snail (Archachatina degneri)
African Land Snail (Achatina reticulata)
African Land Snail (Achatina glutinosa)
African Land Snail (Achatina panthera)
African Land Snail (Achatina varicosa)
African oil palm (Elaeis guineensis)
African paradise flycatcher (Terpsiphone viridis)
African penguin (Spheniscus demersus)
African rue (Peganum harmala)
African tortoise tick (Amblyomma marmoreum)
African violet (Saintpaulia teitensis)
African violet (Saintpaulia spp.)
African white rhinoceros (Ceratotherium simum)
African wild dog (Lycaon pictus)
Africanized honey bee (Apis mellifera)
agave (Agave spp.)
Agelenid spider
agreeable tiger moth (Spilosoma congrua)
ailanthus webworm (Atteva punctella)
air pollutants
air potato (Dioscorea bulbifera)
Akanthomyces fungus (Akanthomyces spp.)
Alabama croton (Croton alabamensis)
Alabama larkspur (Delphinium alabamicum)
Alabama skipper (Euphyes dion)
Alabama supplejack (Berchemia scandens)
alang-alang gall midge (Orseolia javonica)
Alaska-cedar (Chamaecyparis nootkatensis)
albino land snail (Achatina iredalei)
albopicta scale (Acutaspis albopicta)
alder (Alnus spp.)
alder flea beetle (Altica ambiens)
alder leaf beetle (Agelastica alni)
alder leaf beetle (Agelastica alni)
alder moth (Acronicta alni)
alderleaf mountain mahogany (Cercocarpus montanus)
aleppo pine (Pinus halepensis)
Aleurodiscus cankers (Aleurodiscus spp.)
alewife (Alosa pseudoharengus)
Alexid beetle (Sphaerosoma pilosissimum)
Alexid beetle (Sphaerosoma pubescens)
Alexid beetle (Sphaerosoma piliferum)
Alexid beetle (Sphaerosoma reitteri)
Alexid beetle (Sphaerosoma pilosum)
Alexid beetle (Sphaerosoma alutaceum)
Alexid beetle (Sphaerosoma apuanum)
Alexid beetle (Sphaerosoma bosnicum)
Alexid beetle (Sphaerosoma carpathicum)
Alexid beetle (Sphaerosoma corcyreum)
Alexid beetle (Sphaerosoma globosum)
Alexid beetle (Sphaerosoma laevicolle)
Alexid beetle (Sphaerosoma maritimum)
Alexid beetle (Sphaerosoma obsoletum)
Alexid beetle (Sphaerosoma punctatum)
Alexid beetle (Sphaerosoma seiditzi)
Alexid beetle (Sphaerosoma sublaeve)
Alexid beetle (Sphaerosoma vallambrosae)
Alexid beetle (Sphaerosoma winneguthi)
Alexid beetle (Sphaerosoma globosum)
Alexid beetle (Sphaerosoma antennarium)
Alexid beetle (Sphaerosoma latitarse)
Alexid beetle (Sphaerosoma merditanum)
Alexid beetle (Sphaerosoma pilosum)
Alexid beetle (Sphaerosoma reitteri)
Alexid beetle (Sphaerosoma shardaghense)
Alexid beetle (Sphaerosoma sturanyi)
Alexid beetle (Sphaerosoma fiorii)
Alexid beetle (Sphaerosoma hemisphaericum)
Alexid beetle (Sphaerosoma paganetti)
Alexid beetle (Sphaerosoma reitteri)
Alexid beetle (Sphaerosoma solarii)
Alexid beetle (Sphaerosoma sparsum)
alfalfa (Medicago sativa)
alfalfa caterpillar (Colias eurytheme)
alfalfa leaf spot (Pseudopeziza medicaginis)
alfalfa looper (Autographa californica)
Alfalfa Mosaic Virus (Alfamovirus AMV)
alfalfa plant bug (Adelphocoris lineolatus)
alfalfa snout beetle (Otiorhynchus ligustici)
alfalfa webworm (Loxostege cereralis)
alfalfa weevil (Hypera postica)
algal leaf spot (Cephaleuros virescens)
alkalai marsh aster (Almutaster pauciflorus)
alkalai pepperweed (Lepidium crenatum)
alkali bee (Nomia melanderi)
alkali fly (Ephydra hians)
alkali sacaton (Sporobolus airoides)
allanblackia (Allanblackia shuhlmanii)
Allegheny monkeyflower (Mimulus ringens)
Allegheny mound ant (Formica exsectoides)
Allegheny serviceberry (Amelanchier laevis)
Allegheny spurge (Pachysandra procumbens)
alley cropping
alligatorweed (Alternanthera philoxeroides)
alligatorweed flea beetle (Agasicles hygrophila)
alligatorweed moth (Arcola malloi)
alligatorweed thrips (Amynothrips andersoni)
almond (Prunus dulcis)
almond moth (Cadra cautella)
almond-leaved willow (Salix triandra)
aloe (Aloe spp.)
alpine besseya (Besseya alpina)
alpine clover (Trifolium dasyphyllum)
alpine currant (Ribes alpinum)
alpine false springparsley (Pseudocymopterus montanus)
alpine leafybract aster (Symphyotrichum foliaceum)
alpine milkvetch (Astragalus alpinus)
alpine oreoxis (Oreoxis alpina)
alpine pennycress (Thlaspi montanum)
alpine pennycress (Thlaspi montanum)
alpine sagebrush (Artemisia scopulorum)
alpine sawsepal penstemon (Penstemon glaber)
alpine smelowskia (Smelowskia calycina)
alpine timothy (Phleum commutatum)
alpine violet (Viola labradorica)
alsike clover (Trifolium hybridum)
Alternaria blight (Alternaria dauci)
Alternaria blight (Alternaria dianthicola)
Alternaria blight (Alternaria panax)
Alternaria blight (Alternaria tenuissima)
Alternaria leaf blight (Alternaria cucumerina)
alternateleaf dogwood (Cornus alternifolia)
Amanda's pennant (Celithemis amanda)
Amanita mushroom (Amanita spp.)
amaryllis (Amaryllis spp.)
amber darter (Percina antesella)
ambrosia beetle (Oxoplatypus quadridentatus)
ambrosia beetle (Xyleborus horridus)
ambrosia beetle (Euplatypus parallelus)
ambrosia beetle (Amphicranus cordatus)
ambrosia beetle (Corthylocurus aguacatensis)
ambrosia beetle (Corthylus detrimentosus)
ambrosia beetle (Glochinocerus gemellus)
ambrosia beetle (Gnathotriculus sulcatus)
ambrosia beetle (Monarthrum laterale)
ambrosia beetle (Xyleborus dryographus)
ambrosia beetle (Xyleborus affinis)
ambrosia beetle (Xyleborus xylographus)
ambrosia beetle (Xyleborus atratus)
ambrosia beetle (Xyleborus pelliculosus)
ambrosia beetle (Ambrosiodmus funereus)
ambrosia beetle (Trypodendron signatum)
ambrosia beetle (Xylosandrus germanus)
ambrosia beetle (Myoplatypus flavicornis)
ambrosia beetle (Euplatypus compositus)
ambrosia beetle (Xyleborus celsus)
ambrosia beetle (Ambrosiodmus lecontei)
ambrosia beetle (Ambrosiodmus obliquus)
ambrosia beetle (Ambrosiodmus rubricollis)
ambrosia beetle (Monarthrum fasciatus)
ambrosia beetle (Trypodendron scabricollis)
ambrosia beetle (Xyleborus pubescens)
ambrosia beetle (Xyleborus volvulus)
ambrosia beetles (Platypus spp.)
ambrosia beetles (Corthylus spp.)
ambrosia beetles (Ambrosiodmus spp.)
ambrosia beetles (Xylosandrus spp.)
ambrosia beetles (Tricolus spp.)
ambush bug (Phymata americana)
ambush bugs (Phymata spp.)
American alligator (Alligator mississippiensis)
American alpine speedwell (Veronica wormskjoldii)
American aspen beetle (Gonioctena americana)
American avocet (Recurvirostra americana)
American badger (Taxidea taxus)
American basswood (Tilia americana)
American beautyberry (Callicarpa americana)
American beaver (Castor canadensis)
American beech (Fagus grandifolia)
American bellflower (Campanulastrum americanum)
American bison (Bos bison)
American bittern (Botaurus lentiginosus)
American bittersweet (Celastrus scadens)
American black nightshade (Solanum americanum)
American bladdernut (Staphylea trifolia)
American buckwheat vine (Brunnichia ovata)
American burnweed (Erechtites hieraciifolia)
American carrion beetle (Necrophila americana)
American chestnut (Castanea dentata)
American climacium moss (Climacium americanum)
American climbing fern (Lygodium palmatum)
American cockroach (Periplaneta americana)
American copper (Lycaena phlaeas)
American cranberrybush (Viburnum opulus)
American dagger moth (Acronicta americana)
American dog tick (Dermacentor variabilis)
American dwarf mistletoe (Arceuthobium americanum)
American eelgrass (Vallisneria americana)
American elm (Ulmus americana)
American evergreen (Syngonium podophyllum)
American ginseng (Panax quinquefolius)
American globeflower (Trollius laxus)
American goldfinch (Carduelis tristis)
American grasshopper (Schistocerca americana)
American hawthorn rust (Gymnosporangium globosum)
American hazelnut (Corylus americana)
American holly (Ilex opaca)
American hornbeam (Carpinus caroliniana)
American horse fly (Tabanus americanus)
American house spider (Achaearanea tepidariorum)
American kestrel (Falco sparverius)
American licorice (Glycyrrhiza lepidota)
American lopseed (Phryma leptostachya)
American lotus (Nelumbo lutea)
American mink (Mustela vison)
American mountain ash (Sorbus americana)
American pasqueflower (Pulsatilla patens)
American pika (Ochotona princeps)
American plum (Prunus americana)
American plum borer (Euzophera semifuneralis)
American pokeweed (Phytolacca americana)
American red raspberry (Rubus idaeus)
American robin (Turdus migratorius)
American rockbrake (Cryptogramma acrostichoides)
American smoketree (Cotinus obovatus)
American snout butterfly (Libytheana carinenta)
American speedwell (Veronica americana)
American spider beetle (Mezium americanum)
American spongeplant (Limnobium spongia)
American squawroot (Conopholis americana)
American sycamore (Platanus occidentalis)
American toad (Bufo americanus)
American trailplant (Adenocaulon bicolor)
American umbrellaleaf (Diphylleia cymosa)
American vetch (Vicia americana)
American water horehound (Lycopus americanus)
American water-willow (Justicia americana)
American white pelican (Pelecanus erythrorhynchos)
American white waterlily (Nymphaea odorata)
American widgeon (Anas americana)
American wisteria (Wisteria frutescens)
American woodcock (Scolopax minor)
American yellowrocket (Barbarea orthoceras)
amphipod (Hyalella azteca)
Amur chokecherry (Prunus maackii)
Amur corktree (Phellodendron amurense)
Amur honeysuckle (Lonicera maackii)
Amur maple (Acer ginnala)
Amur peppervine (Ampelopsis brevipedunculata)
Amur privet (Ligustrum amurense)
Amylostereum rot (Amylostereum areolatum)
Anacamptodon moss (Anacamptodon splachnoides)
anchor stink bug (Stiretrus anchorago)
anchored waterhyacinth (Eichhornia azurea)
Andean Potato Latent Virus (Tymovirus APLV)
Andean potato weevil (Premnotrypes suturicallus)
Andean potato weevil (Premnotrypes vorax)
Andes Mountains
Andrenid bee (Andrena spp.)
Andrenid bee (Andrena maderensis)
Andrenid bee (Andrena wollastoni)
angel tern (Gygis alba)
angel's trumpet (Datura innoxia)
Angoumois grain moth (Sitotroga cerealella)
angular leaf spot (Xanthomonas fragariae)
angular leaf spot of cotton (Xanthomonas campestris)
angular leaf spot of cucumber (Pseudomonas syringae)
angulat Solomon's seal (Polygonatum odoratum)
angulated cutworm (Syngrapha rectangula)
angulose prominent (Peridea angulosa)
anhinga (Anhinga anhinga)
animated oat (Avena sterilis)
anisescented goldenrod (Solidago odora)
annosum root disease (Heterobasidion annosum)
annual bluegrass (Poa annua)
annual canarygrass (Phalaris canariensis)
annual marshelder (Iva annua)
annual rabbitsfoot grass (Polypogon monspeliensis)
annual ragweed (Ambrosia artemisiifolia)
annual ragweed (Ambrosia artemisiifolia)
annual vernalgrass (Anthoxanthum aristatum)
annual wildrice (Zizania aquatica)
anole (Anolis spp.)
anomodon moss (Anomodon rostratus)
ant (Lasius fuliginosus)
ant (Tetramorium simillimum)
ant (Cardiocondyla venustula)
ant (Odontomachus spp.)
Antarctic beech (Nothofagus antarctica)
antelope bitterbrush (Purshia tridentata)
Anthocorid bug (Scoloposcelis flavicornis)
Anthony's riversnail (Athearnia anthonyi)
anthracnose (Apiognomonia quercina)
anthracnose (Colletotrichum acutatum)
anthracnose (Colletotrichum spp.)
anthracnose (Gnomonia spp.)
anthracnose (Colletotrichum coccodes)
anthracnose (Glomerella lagenaria)
anthracnose (Colletotrichum graminicola)
anthracnose (Colletotrichum truncatum)
anthracnose (Colletotrichum nicotianae)
anthracnose (Colletotrichum fragariae)
anthracnose (Apiognomonia spp.)
Anthracnose, pink boll rot or seedling blight of cotton (Colletotrichum gossypii)
antlion
antlions (Brachynemurus spp.)
antlions (Myrmeleon spp.)
ants (Polyrhachis spp.)
ants (Lasius spp.)
ants (Formica spp.)
ants
ants, bees, sawflies, wasps, and allies
aphid (Lachnus roboris)
aphid (Pemphigus spyrothecae)
aphid (Eriosoma lanuginosa)
aphid (Tetraneura ulmi)
aphid (Aphis lutescens)
aphid (Pemphigus populi)
aphid (Acyrthosiphon lactucae)
aphid (Uroleucon ambrosiae)
aphid parasite (Aphelinus spp.)
aphids
aphids, leafhoppers, planthoppers, scale insects and allies
Appalachian barren strawberry (Waldsteinia fragarioides)
Appalachian eyed brown (Satyrodes appalachia)
Appalachian mixed hardwoods
Appalachian monkeyface (Quadrula sparsa)
Appalachian violet (Viola appalachiensis)
apple (Malus domestica)
apple and crabapple (Malus spp.)
apple aphid (Aphis pomi)
apple blossom weevil (Anthonomus pomorum)
apple ermine moth (Yponomeuta malinellus)
apple flea beetle (Altica foliaceae)
apple fruit moth (Argyresthia conjugella)
apple leaf miner (Lyonetia clerkella)
apple maggot (Rhagoletis pomonella)
apple of Peru (Nicandra physalodes)
apple pith moth (Blastodacna atra)
apple proliferation phytoplasma (Phytoplasma AP-MLO)
apple scab (Venturia inaequalis)
apple serviceberry (Amelanchier x grandiflora)
apple tortrix (Archips fuscocupreanus)
apple wood stainer (Monarthrum mali)
appleleaf blistergalls (Eriophyes mali)
appleleaf-curling moth (Adoxophyes privatana)
apricot (Prunus armeniaca)
apricot chlorotic leafroll (Phytoplasma N/A)
Arabis Mosaic Virus (Nepovirus ArMV)
Aradid bugs (Aradus spp.)
araucaria mealybug (Eriococcus araucariae)
arboreal ant (Crematogaster ashmeadi)
arborvitae (Thuja spp.)
Arborvitae Japanese weevil (Brachyderes incanus)
arborvitae leafminer (Argyresthia thuiella)
arborvitae spider mite (Platytetranychus thujae)
arborvitae weevil (Phyllobius intrusus)
arctic alpine forget-me-not (Eritrichium aretioides)
arctic alpine forget-me-not (Eritrichium nanum)
arctic bellflower (Campanula uniflora)
arctic pearlwort (Sagina saginoides)
arctic rush (Juncus arcticus)
arctic skipper (Carterocephalus palaemon)
arctic starflower (Trientalis europaea)
arctic willow (Salix arctica)
arctic yellow violet (Viola biflora)
Argentine ant (Linepithema humile)
Argentine stem weevil (Listronotus bonariensis)
argos skipper (Atrytone arogos)
aridland subterranean termite (Reticulitermes tibialis)
Arizona
Arizona fescue (Festuca arizonica)
Arizona fivespined ips (Ips lecontei)
Arizona mule-ears (Wyethia arizonica)
Arizona thistle (Cirsium arizonicum)
Arkansas mannagrass (Glyceria arkansana)
Armillaria root rot (Armillaria mellea)
Armillaria root rot (Armillaria ostoyae)
Armillaria root rot (Armillaria tabescens)
Armillaria root rot (Armillaria limonea)
Armillaria root rot (Armillaria novae-zelandiae)
Armillaria root rot (Armillaria gallica)
Armillaria root rots (Armillaria spp.)
armored scale (Chionaspis heterophyllae)
armored scale (Parlatoria crypta)
armored scale (Andaspis punicae)
armored scale (Agrallaspis pictor)
armored scale (Hemigymnaspis pimentae)
armored scale (Quernaspis quercus)
armored scale (Lepidosaphes orsomi)
armored scale (Chionaspis ortholobis)
armored scale (Diaspis parasiti)
armored scale (Selenaspidus rubidus)
armored scale (Odonaspis ruthae)
armored scale (Chionaspis sassceri)
armored scale (Melanaspis smilacis)
armored scale (Aonidomytilus solidaginis)
armored scale (Haliaspis spartinae)
armored scale (Aonidiella taxus)
armored scale (Paracupidaspis wilkeyi)
armored scale (Chionaspis wistariae)
armored scale (Lepidosaphes yanagicola)
armored scale (Targionia yuccarum)
armored scale (Furchadaspis zamiae)
armored scale (Gymnaspis aechmeae)
armored scale (Diaspidiotus aesculi)
armored scale (Nuculaspis apacheca)
armored scale (Selenaspidus albus)
armored scale (Hemigymnaspis orchidicola)
armored scale (Lopholeucaspis cockerelli)
armored scale (Rhizaspidiotus dearnessi)
armored scale (Crenulaspidiotus dicentron)
armored scale (Opuntiaspis javanensis)
armored scale (Chionaspis nyssae)
armored scale (Pallulaspis ephedrae)
armored scale (Chionaspis etrusca)
armored scale (Duplachionaspis exalbida)
armored scale (Diaspis gilloglyi)
armored scale (Abgrallaspis gliwicensis)
armored scale (Kuwanaspis hikosani)
armored scale (Lepidosaphes pinnaeformis)
armored scale (Ferrisidea magna)
armored scale (Diaspis manzanitae)
armored scale (Aspidaspis arctostaphyli)
armored scale (Chrysomphalus bifasciculatus)
armored scale (Parlatoria camelliae)
armored scale (Opuntiaspis carinatus)
armored scale (Aonidomytilus ceanothi)
armored scale (Melanaspis coccolobae)
armored scale (Pseudaulacaspis cockerelli)
armored scale (Aonidomytilus concolor)
armored scale (Parlatoria crotonis)
armored scale (Cupidaspis cupressi)
armored scale (Abgrallaspis degeneratus)
armored scale (Nuculaspis californicus)
armored scale (Hemiberlesia diffinis)
armored scale (Diaspis dignus)
armored scale (Diaspidiotus ehrhorni)
armored scale (Pseudoparlatoria parlatorioides)
armored scale (Frogattiella penicillata)
armored scale (Cupressaspis shastae)
armored scale (Unachionaspis tenuis)
armored scale (Lepiosaphes esakii)
armored scale (Crassaspis multipora)
armored scales (Aonidiella spp.)
armored scales (Lepidosaphes spp.)
armored scales (Furcaspis spp.)
armored scales (Chionaspis spp.)
armored scales (Abgrallaspis spp.)
armored scales (Velataspis spp.)
armored scales (Schizentaspidus spp.)
armored scales (Odonaspis spp.)
armored scales (Leucaspis spp.)
armoured scale (Aspidiella sacchari)
army cutworm (Euxoa auxiliaris)
armyworm (Spodoptera spp.)
armyworm moth (Mythimna unipuncta)
armyworms (Mythimna spp.)
arrowfeather threeawn (Aristida purpurascens)
arrowhead scale (Unaspis yanonensis)
arrowleaf balsamroot (Balsamorhiza sagittata)
arrowleaf buckwheat (Eriogonum compositum)
arrowleaf false pickerelweed (Monochoria hastata)
arrowleaf ragwort (Senecio triangularis)
arrowshaped micrathena (Micrathena sagittata)
art work
artist's conk (Ganoderma applanatum)
Ascochyta blight of cotton (Ascochyta gossypii)
Ascodicheana fungus (Ascodicheana rugosa)
ash (Fraxinus spp.)
ash and privet borer (Tylonotus bimaculatus)
ash anthracnose (Gnomoniella fraxini)
ash bark beetle (Hylesinus varius)
ash bark beetles (Hylesinus spp.)
ash borer (Podosesia syringae)
ash borers (Neoclytus spp.)
ash cambium miners (Phytobia spp.)
ash decline
ash flower gall mite (Eriophyes fraxiniflora)
ash heart rot (Perenniporia fraxinophila)
ash leaf spot (Mycosphaerella fraxinicola)
ash midribgall midge (Contarinia canadensis)
ash plant bug (Tropidosteptes amoenus)
ash rusts (Puccinia sparganioides)
ash seed weevils (Lignyodes spp.)
ash sphinx (Manduca jasminearum)
ash yellows (Phytoplasma N/A)
ashy gray lady beetle (Olla v-nigrum)
Asian ambrosia beetle (Xyleborinus saxeseni)
Asian cockroach (Blattella asahinai)
Asian crabgrass (Digitaria bicornis)
Asian elephant (Elephas maximus)
Asian gypsy moth (Lymantria dispar)
Asian kelp (Undaria pinnatifida)
Asian long-horned beetle (Anoplophora glabripennis)
Asian nakedwood (Colubrina asiatica)
Asian sprangletop (Leptochloa chinensis)
Asian tiger mosquito (Aedes albopictus)
Asiatic dayflower (Commelina communis)
Asiatic dock (Rumex confertus)
Asiatic dogwood (Cornus officinalis)
Asiatic garden beetle (Maladera castanea)
Asiatic oak weevil (Cyrtepistomus castaneus)
Asiatic pennywort (Centella asiatica)
Asiatic rice borer (Chilo suppressalis)
asparagus (Asparagus officinalis)
asparagus (Asparagus spp.)
asparagus aphid (Brachycorynella asparagi)
asparagus beetle (Crioceris asparagi)
aspen blotchminer (Phyllonorycter tremuloidiella)
aspen carpenterworm (Acossus populi)
aspen decline
aspen fleabane (Erigeron speciosus)
aspen leafminer (Phyllocnistis populiella)
aspen leaftier (Sciaphila suplex)
aspen pea (Lathyrus laetivirens)
aspen pea (Lathyrus leucanthus)
aspen root girdler (Agrilus horni)
aspen/poplar (Populus spp.)
Aspergillus ear and kernel rot (Aspergillus flavus)
Aspergillus fungi (Aspergillus spp.)
asphodel (Asphodelus albus)
assassin bug (Pselliopus cinctus)
assassin bug
assassin bug (Zelus luridus)
assassin bug (Zelus exsanguis)
assassin bug (Zelus longipes)
assassin bug (Microtomus purcis)
assassin bugs (Rhynocoris spp.)
assassin bugs (Sycanus spp.)
assassin bugs (Ectrychotes spp.)
assassin bugs (Zelus spp.)
assassin bugs (Sinea spp.)
assassin bugs (Sinea spinipes)
aster (Aster spp.)
Aster
aster leafhopper (Macrosteles quadrilineatus)
aster yellows phytoplasma (Phytoplasma N/A)
asteroid moth (Cucullia asteroides)
asthmaweed (Conyza bonariensis)
Atamasco lily (Zephyranthes atamasca)
Athel tamarisk (Tamarix aphylla)
Atlantic canary (Serinus canaria)
Atlantic poison oak (Toxicodendron pubescens)
Atlantic white cedar (Chamaecyparis thyoides)
Atlas cedar (Cedrus atlantica)
atlas moth (Attacus atlas)
Atropellis canker (Atropellis pinicola)
Atropellis canker (Atropellis piniphila)
aulacomnium moss (Aulacomnium palustre)
Australia
Australian pine (Casuarina equisetifolia)
Australian pyralid moth (Austromusotima camptozonale)
Australian saltbush (Atriplex semibaccata)
Australian waterbuttons (Cotula australis)
Austrian draba (Draba fladnizensis)
Austrian fieldcress (Rorippa austriaca)
Austrian pine (Pinus nigra)
autumn coralroot (Corallorrhiza odontorhiza)
autumn dwarf gentian (Gentianella amarella)
autumn moth (Epirrita autumnata)
autumn olive (Elaeagnus umbellata)
avalanches
Avery Peak twinpod (Physaria alpina)
avocado (Persea americana)
avocado thrips (Scirtothrips perseae)
azalea (Rhododendron kaempferi)
azalea (Rhododendron mucronulatum)
azalea (Rhododendron yedoense)
azalea bark scale (Eriococcus azaleae)
azalea caterpillar (Datana major)
azalea lace bug (Stephanitis pyrioides)
azalea leaf beetle (Tricholochmaea rufosanguinea)
azalea leafminer (Caloptilia azaleella)
azalea/rhododendron (Rhododendron spp.)
azalea/rhododendron root rot (Phytophthora cactorum)
azure bluet (Houstonia caerulea)
babysbreath gypsophila (Gypsophila paniculata)
baccharis borer (Oidaematophorus balanotes)
Bachman's warbler (Vermivora bachmanii)
Back Swimmer
bacterial barn rot
bacterial black stalk (Erwinia spp.)
bacterial blight (Pseudomonas syringae)
bacterial blight (Pseudomonas syringae)
Bacterial blight (Xanthomonas arboricola)
bacterial blight of aroids (Xanthomonas axonopodis)
bacterial brown spot (Pseudomonas syringae)
bacterial canker and wilt of tomato (Clavibacter michiganensis)
bacterial canker of poplar (Xanthomonas populi)
bacterial dieback of peach (Pseudomonas syringae)
bacterial fruit blotch (Acidovorax avenae)
bacterial gummosis (Pseudomonas syringae)
bacterial hollow stalk (Erwinia aroideae)
bacterial leaf blight of rice (Xanthomonas oryzae)
bacterial leaf scorch (Xylella fastidiosa)
bacterial leaf streak (Xanthomonas oryzae)
bacterial leaf streak (Xanthomonas translucens)
bacterial leaf streak and bulb rot (Pseudomonas viridiflava)
bacterial necrosis of giant cactus (Erw