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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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189 Images of 38 Subjects View Subject List View Image Details View Thumbnails

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Image Subject Name Scientific Name Description
5495107 artichoke Cynara scolymus perennial globe artichoke plant, Cynara cardunculus var. scolymus
5495134 pineapple-weed Matricaria discoidea pineappleweed plant, Matricaria matricarioides
5495135 pineapple-weed Matricaria discoidea pineappleweed plant, Matricaria matricarioides
5495136 pineapple-weed Matricaria discoidea pineappleweed plant, Matricaria matricarioides
5495102 artichoke Cynara scolymus perennial globe artichoke plant, Cynara cardunculus var. scolymus
5495103 artichoke Cynara scolymus perennial globe artichoke plant, Cynara cardunculus var. scolymus
5495104 artichoke Cynara scolymus perennial globe artichoke plant, Cynara cardunculus var. scolymus; Oxalis corniculata weed infestation in foreground
5495105 artichoke Cynara scolymus perennial globe artichoke leaf, Cynara cardunculus var. scolymus
5495106 artichoke Cynara scolymus perennial globe artichoke plant, Cynara cardunculus var. scolymus; Oxalis corniculata weed infestation in background
5495108 artichoke Cynara scolymus perennial globe artichoke plant, Cynara cardunculus var. scolymus; Oxalis corniculata weed infestation in background
5495109 artichoke Cynara scolymus perennial globe artichoke plant, Cynara cardunculus var. scolymus; Oxalis corniculata weed infestation in background
5495110 artichoke Cynara scolymus perennial globe artichoke plant, Cynara cardunculus var. scolymus
5495112 artichoke Cynara scolymus perennial globe artichoke plant, Cynara cardunculus var. scolymus
5495117 artichoke Cynara scolymus perennial globe artichoke plant, Cynara cardunculus var. scolymus
5495118 artichoke Cynara scolymus perennial globe artichoke plant, Cynara cardunculus var. scolymus
5495119 artichoke Cynara scolymus perennial globe artichoke plants, Cynara cardunculus var. scolymus; Oxalis corniculata weed infestation in foreground
5495120 artichoke Cynara scolymus perennial globe artichoke plant, Cynara cardunculus var. scolymus
5495121 artichoke Cynara scolymus perennial globe artichoke plant, Cynara cardunculus var. scolymus; Oxalis corniculata weed infestation in background
5495126 romaine lettuce Lactuca sativa var. longifolia romaine lettuce production, Lactuca sativa var. longifolia
5495127 romaine lettuce Lactuca sativa var. longifolia Romaine lettuce plants, Lactuca sativa var. longifolia
5495128 romaine lettuce Lactuca sativa var. longifolia Romaine lettuce plants, Lactuca sativa var. longifolia
5495129 romaine lettuce Lactuca sativa var. longifolia Romaine lettuce production, Lactuca sativa var. longifolia
5495130 romaine lettuce Lactuca sativa var. longifolia Romaine lettuce plant, Lactuca sativa var. longifolia
5362603 common sunflower Helianthus annuus Common sunflower (Helianthus annuus) growing as a weed in a field of dry beans.
5358193 chicory Cichorium intybus Field of young chicory plants near Scotts Bluff, Nebraska.
5358192 chicory Cichorium intybus Chicory seedlings in a field near Scotts Bluff, Nebraska.
5358191 chicory Cichorium intybus Chicory seedling in a field near Scotts Bluff, Nebraska.
5358190 safflower Carthamus tinctorius Safflower plants in a field.
5358189 safflower Carthamus tinctorius Row of safflower plants.
5358186 western salsify Tragopogon dubius Flowers of yellow salsify, Tragopogon dubius.
5358185 western salsify Tragopogon dubius Western salsify (Tragopogon dubius) growing as a weed in an alfalfa field.
5358511 Aster Colorful asters and other desert wildflowers in bloom at the Phoenix Botanical Museum.
5360768 great burdock Arctium lappa Burdock seeds during a seed quality evaluation exercise.
5366430 guayule Parthenium argentatum A guayule plant in bloom at the Phoenix Botanical Gardens in Arizona.
5366429 guayule Parthenium argentatum A guayule at the Phoenix Botanical Gardens in Arizona.
5361619 sunflower Helianthus spp. Birds' damage to a sunflower head in the field.
5361618 sunflower Helianthus spp. Birds' damage to a sunflower head in the field.
5365974 common sunflower Helianthus annuus A drybean field with wild sunflower weeds infestation.
5360543 sunflower Helianthus spp. A sunflower nursery used for white mold (Sclerotinia sclerotiorum) research at the Agricultural Research, Development and Education Center (ARDEC) in Colorado.
5367080 sunflower Helianthus spp. A sunflower field in Malawi.
5366394 blanketflower Gaillardia spp. Blanket flower (Gaillardia pulchella) at the Phoenix Botanical Gardens in Arizonia.
5365662 lettuce Lactuca sativa Farm workers harvesting lettuce in the field.
5365661 lettuce Lactuca sativa Farm workers harvesting lettuce in the field.
5365660 lettuce Lactuca sativa A leaf lettuce field in Colorado.
5365659 lettuce Lactuca sativa A leaf lettuce field in Colorado.
5365632 sunflower Helianthus spp. A sunflower plot at ARDEC used for white mold (Sclerotinia sclerotiorum) research.
5365997 safflower Carthamus tinctorius Safflower plants growing on a field in Colorado.
5365996 safflower Carthamus tinctorius Safflower plants growing on a field in Colorado.
5365995 safflower Carthamus tinctorius Safflower plants growing on a field in Colorado.
5365929 sunflower Helianthus spp. A sunflower field in Colorado.
5365928 sunflower Helianthus spp. A sunflower field in Colorado.
5365926 sunflower Helianthus spp. A sunflower field in Colorado.
5365927 sunflower Helianthus spp. A sunflower field in Colorado.
5365924 sunflower Helianthus spp. A sunflower field in Colorado.
5365925 sunflower Helianthus spp. A sunflower field in Colorado.
5365923 sunflower Helianthus spp. A sunflower head on a field in Colorado.
5365922 sunflower Helianthus spp. A sunflower head on a field in Colorado.
5361679 sunflower Helianthus spp. A young sunflower plant on a field in Colorado.
5361677 sunflower Helianthus spp. Young sunflower plants on a field in Colorado.
5361678 sunflower Helianthus spp. Young sunflower plants on a field in Colorado.
5361656 zinnia Zinnia spp. Zinnia plants on a zinnia seed production field at Rocky Ford in Colorado.
5361654 zinnia Zinnia spp. A zinnia seed production field at Rocky Ford in Colorado.
5361655 zinnia Zinnia spp. A zinnia seed production field at Rocky Ford in Colorado.
5361653 zinnia Zinnia spp. A zinnia seed production field at Rocky Ford in Colorado.
5361652 zinnia Zinnia spp. A zinnia seed production field at Rocky Ford in Colorado.
5361651 zinnia Zinnia spp. A zinnia seed production field at Rocky Ford in Colorado.
5364492 lettuce Lactuca sativa Some young lettuce plants growing in the field.
5364491 lettuce Lactuca sativa A young lettuce plant growing in the field.
5364490 lettuce Lactuca sativa A young lettuce plant growing in the field.
5364388 lettuce Lactuca sativa Lettuce seeds during a seed quality inspection exercise.
5363797 sunflower Helianthus spp. Sunflower seeds during a seed quality inspection exercise.
5363795 safflower Carthamus tinctorius Safflower seeds during a seed quality inspection exercise.
5363796 safflower Carthamus tinctorius Safflower seeds during a seed quality inspection exercise.
5363758 safflower Carthamus tinctorius Safflower plants in bloom in the field.
5363757 safflower Carthamus tinctorius A safflower plant in bloom in the field.
5363755 safflower Carthamus tinctorius A safflower plant in bloom in the field.
5363756 safflower Carthamus tinctorius A safflower plant in bloom in the field.
5363754 safflower Carthamus tinctorius A safflower plant in bloom in the field.
5363710 lettuce Lactuca sativa A leaf lettuce plant growing in the field.
5363709 lettuce Lactuca sativa Lettuce culls left in the field.
5362704 lettuce Lactuca sativa A scenic view of a lettuce field at Delta in Colorado.
5362703 lettuce Lactuca sativa A scenic view of a lettuce field at Delta in Colorado.
5362692 safflower Carthamus tinctorius A mature safflower field at Sterling in Colorado.
5362691 safflower Carthamus tinctorius A mature safflower plant growing on a field at Sterling in Colorado.
5362627 sunflower Helianthus spp. The stamens of the flower head of a sunflower plant.
5362628 sunflower Helianthus spp. The stamens of the flower head of a sunflower plant.
5362625 sunflower Helianthus spp. A blossom (flower head) of a sunflower plant growing in the field.
5362626 sunflower Helianthus spp. A blossom (flower head) of a sunflower plant growing in the field.
5362624 sunflower Helianthus spp. A blossom (flower head) of a sunflower plant growing in the field. Please note the yellow pollens on the leaf.
5362623 sunflower Helianthus spp. A blossom (flower head) of a sunflower plant growing in the field.
5362622 sunflower Helianthus spp. A blossom (flower head) of a sunflower plant growing in the field.
5362621 sunflower Helianthus spp. A young blossom of a sunflower plant growing in the field.
5362620 sunflower Helianthus spp. A young blossom of a sunflower plant growing in the field.
5362619 sunflower Helianthus spp. A flower bud of a sunflower plant growing in the field.
5362618 sunflower Helianthus spp. A sunflower seedling growing in the field.
5362617 sunflower Helianthus spp. A field of young sunflower plants.
5362616 sunflower Helianthus spp. A field of sunflower plants at the flowering stage of development.
5362615 sunflower Helianthus spp. A field of sunflower plants at the pre-bloom stage of development.
5362613 sunflower Helianthus spp. A cultivator in use on a sunflower field.
5362612 sunflower Helianthus spp. A cultivator in use on a sunflower field.
5361066 sunflower Helianthus spp. A field of mature sunflower plants ready to be harvested.
5360288 sunflower Helianthus spp. A field of young sunflower plants in Malawi.
5359319 sunflower Helianthus spp. A sunflower head in the field.
5359318 sunflower Helianthus spp. Sunflower stalks and some other plant debris on the field after a harvesting operation.
5359317 sunflower Helianthus spp. Sunflower stalks and some other plant debris on the field after a harvesting operation.
5359315 safflower Carthamus tinctorius Safflower plants in bloom in the field.
5359314 safflower Carthamus tinctorius Safflower plants growing in the field.
5359673 lettuce Lactuca sativa Lettuce plants growing in the field.
5359672 lettuce Lactuca sativa Lettuce plants growing in the field.
5358957 sunflower Helianthus spp. A field of sunflower plants in Malawi, Africa.
5358914 sunflower Helianthus spp. A close-up shot of a mature sunflower head in the field.
5358913 sunflower Helianthus spp. A close-up shot of a mature sunflower head in the field.
5358912 sunflower Helianthus spp. A field of mature sunflower plants in Burlington.
5365920 rubberweeds Hymenoxys spp. Hymenoxys flowers in bloom.
5359017 whiteweed Ageratum spp. Ageratum 'Blue Hawaii' blooming in a garden.
5359011 daisybush Osteospermum spp. Osteospermum 'Passion Mix' blooming in a garden.
5358437 sunflower Helianthus spp. A young developing flowerhead of a sunflower in the field.
5358402 safflower Carthamus tinctorius Safflower plants at the pre-bloom stage of development in the field.
5358401 safflower Carthamus tinctorius Safflower plants at the pre-bloom stage of development in the field.
5358400 safflower Carthamus tinctorius A safflower plant at the pre-bloom stage of development in the field.
5358377 lettuce Lactuca sativa Some young lettuce plants in the field.
5358376 lettuce Lactuca sativa A scenic view of a field of lettuce.
5357371 sunflower Helianthus spp. The flowerhead of a sunflower plant in the field.
5357372 sunflower Helianthus spp. The flowerhead of a sunflower plant in the field.
5357369 sunflower Helianthus spp. The flowerhead of a sunflower plant in the field.
5357370 sunflower Helianthus spp. The flowerhead of a sunflower plant in the field.
5357260 sunflower Helianthus spp. A scenic view of a sunflower field.
5357259 sunflower Helianthus spp. A scenic view of a sunflower field.
5357258 sunflower Helianthus spp. A close-up view of the growing point of a sunflower seedling at the 4-leaf stage of development in the field.
5357256 sunflower Helianthus spp. Sunflower seedlings at the 4-leaf stage of development in the field.
5357257 sunflower Helianthus spp. Sunflower seedlings at the 4-leaf stage of development in the field.
5357255 sunflower Helianthus spp. A sunflower seedling at the 4-leaf stage of development in the field.
5357254 sunflower Helianthus spp. A sunflower seedling at the 4-leaf stage of development in the field.
5357253 sunflower Helianthus spp. Emergence of sunflower seedlings in the field.
5357250 sunflower Helianthus spp. Emergence of sunflower seedlings in the field.
5357251 sunflower Helianthus spp. Emergence of sunflower seedlings in the field.
5357252 sunflower Helianthus spp. Emergence of sunflower seedlings in the field.
5357249 sunflower Helianthus spp. Emergence of sunflower seedlings in the field.
5361576 goldenrod Solidago spp. Goldenrod plants in bloom, Rocky Mountain National Park.
5361572 blanketflower Gaillardia aristata Blanketflower, fading and beginning to set seed - Rocky Mountain National Park, Colorado.
5362361 sulphur cosmos Cosmos sulphureus Yellow cosmos blossoms in a flower garden.
5365919 yarrow Achillea spp. Close-up view of the flowers in an Achillea sp. inflorescence.
5365918 aster Aster spp. Asters in bloom.
5366035 blanketflower Gaillardia spp. The Burgundy blanket flower as an ornamental plant.
5366032 black-eyed susan Rudbeckia hirta The Black-eyed Susan as an ornamental plant.
5366031 chrysanthemum Chrysanthemum spp. The Blue Daisy as an ornamental plant.
5365305 marigold Tagetes spp. The 'Discovery Orange' type of African marigold at the CSU Horticultural Demonstration Garden in Colorado.
5365304 marigold Tagetes spp. The 'Antique Primrose' type of African marigold at the CSU Horticultural Demonstration Garden in Colorado.
5365303 marigold Tagetes spp. The 'Zenith Red' type of marigold at the CSU Horticultural Demonstration Garden in Colorado.
5361575 goldenrod Solidago spp. Goldenrod flowers (Solidago sp.) with chrysomelid beetle visitors.
5362360 blanketflower Gaillardia spp. Close-up view of a cultivated blanketflower variety.
5362085 sunflower Helianthus spp. Sunflowers in bloom in eastern Colorado.
5366038 yarrow Achillea spp. Yarrow flowers (Achillea sp.) going to seed.
5366028 upright prairie coneflower Ratibida columnifera Close-up view of prairie coneflowers (Ratibida columnifera) near the end of bloom.
5366027 upright prairie coneflower Ratibida columnifera Prairie coneflowers near the end of bloom.
5364483 chrysanthemum Chrysanthemum spp. Some daisy plants in bloom in a garden.
5362740 zinnia Zinnia spp. Red zinnia flowers in the field.
5362739 zinnia Zinnia spp. Red zinnia flower in a garden.
5362962 zinnia Zinnia spp. White zinnias in bloom.
5358408 cornflower Centaurea cyanus Cornflowers (also known as bachelor's buttons, Centaurea cyanus) growing in a field.
5358406 chrysanthemum Chrysanthemum spp. White garden daisies.
5359012 common zinnia Zinnia violacea The 'Crystal White' type of the ornamental flower Zinnia elegans.
5359035 marigold Tagetes spp. The 'Luna Lemon' type of the ornamental marigold Tagetes tenuifolia.
5359026 Transvaal daisy Gerbera spp. The 'Festival' type of the ornamental flower Gerbera spp..
5359013 common zinnia Zinnia violacea   The Profusion Cherry type of Zinnia elegans in flower.
5359014 common zinnia Zinnia violacea The Profusion Cherry type of Zinnia elegans in flower.
5363680 lettuce Lactuca sativa Flowers on a bolting stalk of lettuce.
5363679 lettuce Lactuca sativa Lettuce plants bolting into flower.
5364567 musk thistle Carduus nutans Rosettes of musk thistle (Carduus nutans).
5364568 musk thistle Carduus nutans Seedlings of musk thistle (Carduus nutans).
5364523 giant ragweed Ambrosia trifida Young giant ragweed (Ambrosia trifida) plant.
5364521 musk thistle Carduus nutans Rosettes of musk thistle (Carduus nutans).
5364473 dandelion Taraxacum officinale Dandelion (Taraxacum officinale) in bloom.
5364441 common sunflower Helianthus annuus Seeds of wild sunflowers (Helianthus annuus).
5364437 Russian knapweed Rhaponticum repens Seeds of Russian knapweed (Acroptilon repens).
5364422 Canada thistle Cirsium arvense Seeds of Canada thistle (Cirsium arvense).
5359316 big sagebrush Artemisia tridentata Big sagebrush (Artemisia tridentata).
5358460 Canada thistle Cirsium arvense Rosettes of Canada thistle (Cirsium arvense).
5357241 common sunflower Helianthus annuus Volunteer sunflower plants growing as weeds in a field of winter wheat.
5357240 common sunflower Helianthus annuus Common sunflower (Helianthus annuus) growing as a weed in a field of winter wheat.
5362065 crownbeard Verbesina encelioides Golden Crown Beard (Verbesina encelioides (Cav.) Benth. & Hook. f. ex Gray) in a drybean field as weeds.
5362067 crownbeard Verbesina encelioides Golden Crown Beard (Verbesina encelioides (Cav.) Benth. & Hook. f. ex Gray) in a drybean field as weeds.
5362063 crownbeard Verbesina encelioides Golden Crown Beard (Verbesina encelioides (Cav.) Benth. & Hook. f. ex Gray) in a drybean field as weeds.
5361784 common sunflower Helianthus annuus Sunflower plant (Helianthus annuus) growing as a weed in a dry bean field.
5362614 common sunflower Helianthus annuus Sunflowers planted in the corner of a dry bean field irrigated with a center pivot system.
5362601 woollyleaf bursage Ambrosia grayi Wollyleaf bursage (Ambrosia grayi) growing as a weed among dry bean plants.
5359562 common sunflower Helianthus annuus Sunflower plant (Helianthus annuus) growing as a volunteer or weed in a field of dry beans.
5359561 common sunflower Helianthus annuus Sunflower plant (Helianthus annuus) growing as a volunteer or weed in a field of dry beans.
5364564 dandelion Taraxacum spp. The weed species dandelion (Taraxacum officinale) plant in an onion field.

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