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Howard F. Schwartz's Images

Title: Professor of Plant Pathology & Assoc. Dept. Head
Organization: Colorado State University
Unit: Plant Pathology
Country: United States
Web: http://www.alliumnet.com/index.htm
Professional Societies:

Howard F. Schwartz is a Professor of Plant Pathology & Associate Department Head in the Department of Bioagricultural Sciences and Pest Management at Colorado State University. His Research and Extension Interests include Integrated Pest Management (IPM) - particularly of rust and white mold of dry bean as well as bacterial diseases and Iris Yellow Spot Virus of onion. Specific areas include management by disease survey, a reporting network supported by GPS/GIS technology, disease resistance, cultural practices, and timely applications of pesticides in response to environmental monitoring and crop/pest modeling. He is also interested in making sure the delivery of time-sensitive information on Integrated Pest Management and Crop Production Systems is coordinated via traditional methods (newsletters, bulletins, alerts, meetings, field days) and via the internet (Legume Pipe, VegNet, Allium Net). He is also the person leading and coordinating the CSU Node of the Bugwood Network.


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Subject Scientific Name Images
*trees 4
2,4-D 1
abiotic stresses (general) 5
adzuki bean Vigna angularis 1
African black rhinoceros Diceros bicornis 2
agave Agave spp. 15
alfalfa Medicago sativa 75
Alfalfa Mosaic Virus Alfamovirus AMV 2
alfalfa plant bug Adelphocoris lineolatus 1
alkaligrass Puccinellia spp. 1
almond Prunus dulcis 10
aloe Aloe spp. 2
Alternaria black molds / stem cankers Alternaria spp. 3
American alligator Alligator mississippiensis 2
American bison Bison bison 6
American plum Prunus americana 2
American red raspberry Rubus strigosus 13
Amur tiger Panthera tigris altaica 1
angular leaf spot of cucumber Pseudomonas syringae pv. lachrymans 1
annual wildrice Zizania aquatica 1
aphids 1
aphids, leafhoppers, planthoppers, scale insects and allies 2
apple Malus domestica 40
apricot Prunus armeniaca 3
art work 2
artichoke Cynara scolymus 15
Asian elephant Elephas maximus 3
asparagus Asparagus officinalis 1
aspen/poplar Populus spp. 15
aster Aster spp. 1
Aster 1
Atlas cedar Cedrus atlantica 1
Austrian pine Pinus nigra 2
babysbreath Gypsophila paniculata 1
bacterial black stalk Erwinia spp. 3
bacterial blight Pseudomonas savastanoi pv. glycinea 12
bacterial blight Pseudomonas syringae pv. aptata 5
bacterial brown spot of bean/canker of stone fruit, twig blight Pseudomonas syringae pv. syringae 34
bacterial leaf spot Pseudomonas syringae 4
bacterial leaf streak and bulb rot Pseudomonas viridiflava 10
bacterial soft rot Pectobacterium carotovorum ssp. carotovorum 13
bacterial spot Xanthomonas vesicatoria 8
bacterial streak, black rot, and blight Xanthomonas campestris 1
bacterial wilt Burkholderia caryophylli 1
bacterial wilt Curtobacterium flaccumfaciens pv. flaccumfaciens 17
bacterial wilt Erwinia tracheiphila 5
bananas Musa spp. 6
bark beetles 1
barley Hordeum vulgare 12
barnyardgrass Echinochloa crus-galli 4
barrel cactus Ferocactus spp. 8
basil Ocimum spp. 1
bean Phaseolus spp. 8
bean angular leaf spot Phaeoisariopsis griseola 14
bean anthracnose Colletotrichum lindemuthianum 13
Bean Common Mosaic Virus Potyvirus BCMV 36
Bean Golden Mosaic Virus Begomovirus BGMV 15
Bean Leaf Roll Virus Luteovirus BLRV 8
beard lichen Usnea spp. 1
beardtongues Penstemon spp. 2
beet armyworm Spodoptera exigua 2
Beet Curly Top Virus Hybrigeminivirus BCTV 17
begonia Begonia spp. 13
big sagebrush Artemisia tridentata 1
bighorn sheep Ovis canadensis 2
bird-of-paradise Strelitzia reginae 2
birdsfoot trefoil Lotus corniculatus 1
black bear Ursus americanus 1
black mold Aspergillus niger 2
black nightshade Solanum nigrum 5
black-eyed susan Rudbeckia hirta 1
blacktip reef shark Carcharhinus melanopterus 1
blanketflower Gaillardia aristata 1
blanketflower Gaillardia spp. 3
blue grama Bouteloua gracilis 3
blue spruce Picea pungens 1
bluebunch wheatgrass Pseudoroegneria spicata ssp. spicata 2
bok-choy Brassica rapa ssp. chinensis 1
botrytis rot Botrytis allii 26
bougainvillea Bougainvillea spp. 2
brackenfern Pteridium aquilinum 2
bridge 1
broccoli Brassica oleracea var. italica 6
brome Bromus spp. 1
bromeliads 4
brown spot Alternaria alternata 5
brussels sprouts Brassica oleracea var. gemmifera 1
buckhorn plantain Plantago lanceolata 1
buckwheat Fagopyrum esculentum 1
buffalobur Solanum rostratum 7
building 60
bumble bees Bombus spp. 1
Burchell's zebra Equus quagga burchellii 1
butterflies, moths or skippers Lepidoptera (Order) 1
button mushroom Agaricus bisporus 17
cabbage Brassica oleracea var. capitata 23
cabbage collards and kale Brassica oleracea 11
cacti 5
cactus Cleistocactus sextonianus 2
cactus Gymnocalycium bayrianum 1
cactus Isolatocereus spp. 2
cactus Stenocereus spp. 3
California poppy Eschscholzia californica 1
calla lily Zantedeschia aethiopica 20
camel Camelus spp. 2
Canada thistle Cirsium arvense 2
canarygrass Phalaris canariensis 5
candelilla Euphorbia antisyphilitica 2
canola Brassica napus var. napus 26
cantaloupe Cucumis melo Cantalupensis Group 5
capybara Hydrochoerus hydrochaeris 1
carnation Dianthus spp. 3
carrot Daucus carota ssp. sativus 49
castorbean Ricinus communis 1
catalpa Catalpa spp. 1
catnip Nepeta cataria 1
cattail Typha spp. 2
cattle Bos spp. 24
cauliflower Brassica oleracea var. botrytis 6
cedar Cedrus spp. 1
cedar-apple rust Gymnosporangium juniperi-virginianae 2
celery Apium spp. 1
Celosia Celosia spp. 2
cenizo Leucophyllum laevigatum 2
Cercospora fungi Cercospora spp. 4
Cercospora leaf spot Cercospora beticola 7
cereal rye Secale cereale 7
Chaetoseptoria leaf spot Chaetoseptoria wellmanii 3
charcoal rot Macrophomina phaseolina 11
chayote Sechium edule 3
cheatgrass Bromus tectorum 1
cheetah Acinonyx jubatus 1
chemicals 15
cherimoya Annona cherimola 1
chicken (domestic) Gallus gallus (domestic type) 1
chickpea Cicer arietinum 25
chicory Cichorium intybus 3
chinese cabbage Brassica pekinensis 15
chipmunk Tamias spp. 1
chives Allium schoenoprasum 2
Choanephora fruit rot Choanephora cucurbitarum 3
chrysanthemum Chrysanthemum spp. 3
chufa flatsedge Cyperus esculentus var. leptostachyus 7
city 11
Clark's nutcracker Nucifraga columbiana 1
cleaning 1
clopyralid 28
clouds 9
clover Trifolium spp. 3
coconut palm Cocos nucifera 1
codling moth Cydia pomonella 1
coffee Coffea spp. 12
coffee leaf rust Hemileia vastatrix 3
cold injury (low temperature) 20
Colorado 1
Colorado potato beetle Leptinotarsa decemlineata 9
common arrowhead Sagittaria latifolia 1
Common bacterial blight of beans, fuscous blight Xanthomonas axonopodis pv. phaseoli 70
common bean Phaseolus vulgaris 577
common beet Beta vulgaris 2
common cattail Typha latifolia 2
common flax Linum usitatissimum 3
common mallow Malva neglecta 3
common purslane Portulaca oleracea 3
common smut Ustilago maydis 10
common sunflower Helianthus annuus 9
common wheat Triticum aestivum 100
common zinnia Zinnia violacea 3
Coniothyrium fungus Coniothyrium concentricum 2
copper mine 5
copper toxicity 2
coriander Coriandrum sativum 8
corn Zea mays 148
cornflower Centaurea cyanus 1
corral 3
cotoneaster Cotoneaster spp. 1
cotton Gossypium hirsutum 11
covered smut Ustilago hordei 1
cowpea Vigna unguiculata 6
cranes 1
creeping woodsorrel Oxalis corniculata 3
crested wheatgrass Agropyron cristatum 5
crookneck squash Cucurbita moschata 8
crown rust Puccinia coronata 3
crownbeard Verbesina encelioides 3
crystalline iceplant Mesembryanthemum crystallinum 4
cucumber Cucumis sativus 42
cucurbits 2
cultivated garlic Allium sativum 5
cultivation 52
cultural practices 5
curly dock Rumex crispus 1
Cyathus fungus Cyathus stercoreus 1
daisybush Osteospermum spp. 1
dandelion Taraxacum officinale 1
dandelion Taraxacum spp. 1
daylily Hemerocallis spp. 1
deadwood and snags 1
decay 1
deer 1
desert ironwood Olneya tesota 2
desert willow Chilopsis linearis 3
devil's-claw Proboscidea louisianica 3
dill Anethum graveolens 2
disease forecasting 42
Dixie silverback fern Pityrogramma calomelanos 1
dodder Cuscuta spp. 11
dog (domestic) Canis lupus familiaris 2
downy mildew Peronospora destructor 18
downy mildew Peronospora parasitica 2
drought 3
dry bean rust Uromyces appendiculatus 106
early blight Alternaria solani 71
eastern pine gall rust Cronartium quercuum 1
eastern redcedar Juniperus virginiana 2
eastern tiger swallowtail Papilio glaucus 2
eggplant Solanum melongena 11
elephant bush Portulacaria afra 2
elephant grass Pennisetum purpureum 2
elk Cervus canadensis 2
Engelmann's hedgehog cactus Echinocereus engelmannii 2
Enterobacter bulb decay Enterobacter cloacae 7
ergot Claviceps purpurea 1
European red raspberry Rubus idaeus 1
fall color 2
farm 5
fence 11
fertilization 8
field bindweed Convolvulus arvensis 10
field pea Pisum sativum 8
field pennycress Thlaspi arvense 2
fig/banyan Ficus spp. 1
fire blight Erwinia amylovora 1
firecracker cactus Cleistocactus baumannii 2
fireweed Chamerion angustifolium 1
fishing 2
fivepetal cliffbush Jamesia americana 1
flamingo Phoenicopterus spp. 3
flea beetles Aphthona spp. 1
flea beetles Chaetocnema spp. 1
flooding/high water 2
Floury leaf spot Mycovellosiella phaseoli 8
fountaingrass Pennisetum spp. 3
foxtail barley Hordeum jubatum 1
foxtail millet Setaria italica 4
frost and winter injury (general) 22
fungus Sclerotium delphinii 3
Fusarium damping-off Fusarium oxysporum f.sp. cepae 16
Fusarium root rot and wilt Fusarium oxysporum 10
Fusarium wilt Fusarium oxysporum f.sp. phaseoli 28
Fusarium wilts, blights, rots and damping-off Fusarium spp. 7
garden beet Beta vulgaris ssp. vulgaris (garden beet group) 3
garden cress Lepidium sativum 1
garden onion Allium cepa 445
garden rhubarb Rheum rhabarbarum 2
gardens 8
gemsbok Oryx gazella 1
genetic abnormalities 10
geologic feature 25
geranium Geranium spp. 1
giant ragweed Ambrosia trifida 1
Gibberella stalk rot Gibberella zeae 3
giraffe Giraffa camelopardalis 2
goldenrod Solidago spp. 2
gorilla Gorilla gorilla 1
Goss' bacterial wilt Clavibacter michiganensis ssp. nebraskensis 3
gourd Cucurbita spp. 1
grasshoppers 6
gray mold Botrytis cinerea 5
gray molds Botrytis spp. 4
gray wolf Canis lupus 1
great burdock Arctium lappa 1
great green macaw Ara ambigua 1
Great Plains yucca Yucca glauca 3
green ash Fraxinus pennsylvanica 2
green foxtail Setaria viridis 6
grey crowned crane Balearica regulorum 2
grizzly bear Ursus arctos 5
growth & yield 2
guar Cyamopsis tetragonoloba 3
guayule Parthenium argentatum 2
gulls 1
hail 32
hairy vetch Vicia villosa 2
halo blight Pseudomonas savastanoi pv. phaseolicola 44
hamatocactus Hamatocactus spp. 2
harvesting 2
hay 14
head smut Sphacelotheca reiliana 1
heat 18
herbicides (general) 28
hibiscus Hibiscus spp. 19
High Plains Virus Uncharacterised virus HPV 10
high soluble salts 3
hippopotamus Hippopotamus amphibius 3
hoary cress Lepidium draba 1
hoary marmot Marmota caligata 1
honey bee Apis mellifera 2
horse (domestic) Equus caballus (domestic type) 9
horse (feral) Equus caballus (feral type) 1
horsetail Equisetum spp. 1
hyacinth-bean Lablab purpureus ssp. purpureus 1
hydrangea Hydrangea spp. 2
iceplant Mesembryanthemum spp. 1
Indian mustard Brassica juncea 1
intermediate wheatgrass Thinopyrum intermedium 2
iris Iris spp. 2
Iris Yellow Spot Virus Tospovirus IYSV 121
iron deficiency 4
irrigation 17
jimsonweed Datura stramonium 4
johnsongrass Sorghum halepense 11
jointed goatgrass Aegilops cylindrica 1
Julia Heliconian Dryas julia 1
kenaf Hibiscus cannabinus 14
killer whale Orcinus orca 1
kingcup cactus Echinocereus triglochidiatus 1
kohlrabi Brassica oleracea var. gongylodes 1
laboratory 18
lady's slippers Cypripedium spp. 3
lakes and ponds 9
lambsquarters Chenopodium album 5
lanceleaf sage Salvia reflexa 1
late blight Phytophthora infestans 42
leafhoppers 1
leafminer fly Liriomyza spp. 7
leafy spurge Euphorbia esula 1
lentil Lens culinaris 4
Leopard seal Hydrurga leptonyx 1
lettuce Lactuca sativa 18
lichen 16
lichen Xanthoria spp. 1
lightning 3
lilac Syringa x hyacinthiflora 2
lima bean Phaseolus lunatus 5
little bluestem Schizachyrium scoparium 2
llama Lama glama 1
loading 1
longspine sandbur Cenchrus longispinus 4
loose smut Ustilago avenae 4
loquat Eriobotrya japonica 5
lumber and building materials 10
mammee apple Mammea americana 3
mango Mangifera spp. 1
marigold Tagetes spp. 4
marketplace 16
meadow 8
mechanical 1
melocactus Melocactus spp. 1
melon Cucumis melo 7
mescalito Hechtia montana 1
Mexican bean beetle Epilachna varivestis 3
Mexican fireweed Kochia scoparia 7
Mexico 1
milkvetch Astragalus spp. 1
monkey 2
mother-of-hundreds Mammillaria compressa 2
mountain brome Bromus marginatus 6
mountain goat Oreamnos americanus 1
mountains 55
mourningbride Scabiosa atropurpurea 1
mulching 1
mung bean Vigna radiata 1
mushrooms 6
musk thistle Carduus nutans 3
muskmelon Cucumis melo ssp. melo 2
mustards, crucifers 1
Mycosphaerella fungus Mycosphaerella cruenta 2
narrowtooth sawfishes Pristis spp. 1
nasturtium Tropaeolum majus 1
national forest 1
nectarine Prunus persica var. nucipersica 3
Nectria canker Nectria galligena 1
North American river otter Lontra canadensis 1
nutrient deficiency 10
oat Avena sativa 1
oat Avena spp. 7
oat crown rust Puccinia coronata var. avenae 2
oat stem rust Puccinia graminis f.sp. avenae 1
ocotillo Fouquieria splendens 4
ocotillos Fouquieria spp. 1
okra Abelmoschus esculentus 1
old-man cactus Cephalocereus senilis 2
old-man of the Andes Oreocereus celsianus 2
onion rust Puccinia allii 14
onion smudge Colletotrichum circinans 2
onion smut Urocystis cepulae 1
onion thrips Thrips tabaci 7
Onion yellows phytoplasma Phytoplasma 1
onions Allium spp. 7
orange Citrus x sinensis 1
organ pipe cactus Stenocereus thurberi 1
oriental poppy Papaver orientale 3
ostrich Struthio camelus 1
owls 1
oyster mushroom Pleurotus ostreatus 4
ozone 1
palms 2
paloverde Parkinsonia spp. 4
Pantoea rot and blight Pantoea ananatis pv. ananatis 24
papaya Carica papaya 6
paper mill 1
paraquat 2
parsley Petroselinum crispum 1
passionflower Passiflora edulis 5
passionflower Passiflora spp. 2
paved roads and streets 5
peach Prunus persica 20
peafowl Pavo muticus 2
peanut Arachis hypogaea 5
pear Pyrus spp. 12
pear scab Venturia pirina 1
pecan Carya illinoinensis 8
people 19
pepper Capsicum spp. 27
periwinkle Vinca spp. 3
pesticides 41
petunia Petunia spp. 4
petunia Petunia x hybrida 1
phlox Phlox spp. 1
Phoma blight Phoma exigua var. exigua 2
Phoma blight Phoma macdonaldii 3
Phoma blights Phoma spp. 2
Photography 2
Phytophthora blight Phytophthora capsici 6
phytoplasma (general) Phytoplasma 21
pigweed Amaranthus spp. 9
pine Pinus spp. 4
pine, fir, spruce and larch 2
pineapple lily Eucomis spp. 2
pineapple-weed Matricaria discoidea 3
pink root of onion Phoma terrestris 3
plant bug Lygus spp. 5
plantain Musa x paradisiaca 2
planting 8
plum/cherry Prunus spp. 2
polar bear Ursus maritimus 3
ponderosa pine Pinus ponderosa 4
potato Solanum tuberosum 143
powdery mildew Erysiphe betae 10
powdery mildew Podosphaera fuliginea 9
powdery mildews 1
prairie falcon Falco mexicanus 2
prairies 1
prescribed fire 7
pricklypear cactus Opuntia macrorhiza 4
pricklypear/cholla Opuntia spp. 47
processing/manufacturing 2
puccinia rusts Puccinia spp. 2
puncturevine Tribulus terrestris 8
purple blotch Alternaria porri 25
Pythium diseases Pythium spp. 12
quackgrass Elymus repens 1
quaking aspen Populus tremuloides 6
quinoa Chenopodium quinoa 1
quizalofop-P 6
radish Raphanus sativus 2
rainbow 2
red clover Trifolium pratense 1
red valerian Centranthus ruber 1
redroot pigweed Amaranthus retroflexus 4
redstem stork's bill Erodium cicutarium ssp. cicutarium 1
reed canarygrass Phalaris arundinacea 2
research facility 7
Rhizoctonia damping-off, blight and rot Rhizoctonia solani 21
Rhizopus soft rots Rhizopus spp. 4
rice Oryza sativa 5
rivers and streams 25
roan antelope Hippotragus equinus 1
rocketsalad Eruca vesicaria ssp. sativa 1
Rocky Mountain juniper Juniperus scopulorum 1
Rocky Mountains 1
romaine lettuce Lactuca sativa var. longifolia 5
root problems 2
root rot/damping off Rhizoctonia spp. 5
root-knot nematode Meloidogyne spp. 1
rose Rosa spp. 1
rubberweeds Hymenoxys spp. 1
Russian knapweed Rhaponticum repens 1
Russian thistle Salsola kali 1
Russian wheat aphid Diuraphis noxia 2
Russian-thistle Salsola tragus 2
rust Puccinia aristidae 14
rust Puccinia helianthi 24
rust Puccinia hordei 1
rusts 3
safflower Carthamus tinctorius 19
sage Salvia officinalis 1
sage Salvia spp. 2
saguaro Carnegiea gigantea 2
sainfoin Onobrychis viciifolia 2
sandhill crane Grus canadensis 3
scarlet macaw Ara macao 1
Sclerotinia rot Sclerotinia sclerotiorum 69
scorpion 1
Scots pine Pinus sylvestris 2
sea kale Crambe maritima 1
sea lion Zalophus californianus 2
sea otter Enhydra lutris 1
seedcorn maggot Delia platura 5
seedlings 2
seeds/cones 1
senita cactus Pachycereus schottii 2
sesame Sesamum indicum 6
sheep Ovis aries 3
showy milkweed Asclepias speciosa 2
showy stonecrop Hylotelephium spectabile 1
Siberian elm Ulmus pumila 1
sideoats grama Bouteloua curtipendula 3
sisal Agave sisalana 2
skunkbush sumac Rhus trilobata 1
slime mold Lycogala spp. 1
slippery skin Burkholderia gladioli pv. alliicola 12
Small's skullcap Scutellaria multiglandulosa 1
smut Urocystis colchici 2
smut Ustilago nuda f.sp. hordei 1
snakes 2
snow-on-the-mountain Euphorbia marginata 1
soil & water 24
soil compaction 1
soil crusting 6
sooty mold 1
sorghum Sorghum bicolor 19
sorghum Sorghum spp. 5
sour cherry Prunus cerasus 2
southern blight Sclerotium rolfsii 3
soybean Glycine max 32
spelt Triticum spelta 1
spider mites 5
spider mites Tetranychus spp. 1
spiders 1
spike muhly Muhlenbergia wrightii 3
spinach Spinacia oleracea 22
spray planes 6
spring dead spot Ophiosphaerella korrae 10
spruce Picea spp. 2
Squash Mosaic Virus Comovirus SqMV 1
squashes (general) Cucurbita pepo 16
stem and bulb nematode Ditylenchus dipsaci 3
storm damage (general) 6
strawberry Fragaria spp. 2
strawberry Fragaria x ananassa 11
stripe rust Puccinia striiformis 11
striped cucumber beetle Acalymma vittatum 4
stubby root nematodes Paratrichodorus spp. 6
sudangrass Sorghum bicolor ssp. drummondii 1
sugar beet Beta vulgaris ssp. vulgaris (sugar beet group) 44
sugarcane Saccharum officinarum 5
sulphur cosmos Cosmos sulphureus 1
sunflower Helianthus spp. 60
sunflower root weevil Baris strenua 1
sunrise 4
sunscald 5
sunsets 5
survey 20
sweet cherry Prunus avium 2
switchgrass Panicum virgatum 4
tabardillo Calliandra californica 3
tall fescue Festuca arundinacea 2
tall morningglory Ipomoea purpurea 6
tamarind Tamarindus indica 4
tepary bean Phaseolus acutifolius 1
thatched roof 2
Thompson's gazelle Gazella thomsonii 2
thrips 6
toad Bufo spp. 1
tobacco Nicotiana spp. 4
Tobacco Streak Virus Ilarvirus TSV 8
tomatillo groundcherry Physalis philadelphica 1
tomato Lycopersicon esculentum 16
Tomato Leaf Curl Virus Begomovirus ToLCV 2
toothed spurge Euphorbia dentata 4
toothed spurge Euphorbia dentata var. dentata 1
toxemia 2
transplanting 2
transport 1
Transvaal daisy Gerbera spp. 1
tropical rainforest 13
tulip Tulipa spp. 2
tumble pigweed Amaranthus albus 1
turf (general) 1
turnip Brassica rapa ssp. rapa 1
turtle 1
undercutting 1
unknown 1
unknown fungi 3
unknown virus 21
unpaved roads and trails 5
upright prairie coneflower Ratibida columnifera 2
urban planting 9
velvetleaf Abutilon theophrasti 7
Venice mallow Hibiscus trionum 1
verbena Verbena spp. 1
Verticillium wilt Verticillium dahliae 5
vetch Vicia spp. 1
villages 1
Virginia groundcherry Physalis virginiana 1
walrus Odobenus rosmarus 1
water buffalo Bubalus bubalis 1
water scald 2
water stress 1
waterfalls 7
watermelon Citrullus lanatus 27
western corn rootworm Diabrotica virgifera virgifera 1
western gray kangaroo Macropus fuliginosus 1
western salsify Tragopogon dubius 2
wheat Triticum spp. 8
wheat stem rust Puccinia graminis 2
White Leaf Spot Pseudocercosporella albida 3
white rust Albugo tragopogonis 5
white sapote Casimiroa edulis 2
whitecolumn foxtail cactus Escobaria tuberculosa 1
whiteflies 1
whiteweed Ageratum spp. 1
wild buckwheat Fallopia convolvulus 1
wild mustard Sinapis arvensis 1
wild oat Avena fatua 1
wild parsnip Pastinaca sativa 5
wild-proso millet Panicum miliaceum 15
wildebeest Connochaetes taurinus 1
wind 5
windbreak 2
windmills 9
wine grape Vitis vinifera 21
winter squash Cucurbita maxima 14
witchgrass Panicum capillare 1
Woods' rose Rosa woodsii 1
woody debris 3
woollyleaf bursage Ambrosia grayi 1
Xanthomonas leaf blight of onion Xanthomonas axonopodis pv. allii 58
yarrow Achillea spp. 2
yellow nutsedge Cyperus esculentus 6
yellow sweetclover Melilotus officinalis 1
yucca Yucca spp. 2
zebra caterpillar Melanchra picta 1
zinnia Zinnia spp. 9
zucchini Cucurbita pepo var. pepo 8

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