Picture Archive

A

AGROPYRON MOSAIC VIRUS - agropyron virus on wheat. Agropyron disease description

AMERICAN WHEAT STRIATED MOSAIC VIRUS - leaf symptoms with fine discontinuous chlorotic streaks or striations. Carroll.

APOTHECIUM - American Society for Microbiology (Mathre). Apothecium glossary definition

ASCOCARP - American Society for Microbiology. Ascocarp glossary definition

ASCOCARP, ASCI, PARAPHYSES, ETC. - APS, 1988 (0-89054-091-8 07V) (Mathre).Ascocarp glossary definition

ASCUS - APS, 1988 (0-89054-091-8 02H) Ascus glossary definition

ASEPTATE HYPHAE - American Society for Microbiology (Mathre). Aseptate hyphae glossary definition

ASTER YELLOWS - general chlorsis and yellowing of whole potted plant. Tom Carroll. Aster Yellows disease description

ASTER YELLOWS - 3 wheat heads, healthy (left), sterility, chlorotic, and distorted (center and right). Tom Carroll. Aster Yellows disease description

B

BACTERIAL BLIGHT- general pictureBacterial leaf blight disease description

BACTERIAL BLIGHT - Pseudomonas on individual leaf. Riesselman. Bacterial leaf blight disease description

BACTERIAL BLIGHT - field shot of symptoms in winter wheat. Riesselman. Bacterial leaf blight disease description

BARE PATCH - Spear tip symptom on plant, Riesselman. Bare patch disease description

BARE PATCH - Field symptoms - 1. Mathre. Bare patch disease description

BARE PATCH - Field symptoms - 2. Riesselman. Bare patch disease description

BARLEY YELLOW DWARF - leaf symptoms on Winalta winter wheat, from Utica, MT, 6/18/80. Barley yellow dwarf disease description

BARLEY YELLOW DWARF - Red leaf symptom on Olaf spring wheat, 7/11/80, field shot. Carroll. Barley yellow dwarf disease description

BARLEY YELLOW DWARF (and WSMV) - individual symptomatic plants in field, Mocassin Experiment Station, 6/25/80. Carroll. Barley yellow dwarf disease description

BARLEY YELLOW DWARF - Aphid vector on infected wheat (R. maydis), July 1987. Carroll. Barley yellow dwarf disease description

BARLEY YELLOW DWARF - morphology of vector and illustration of virus transmission. APS, Diseases of Plants, Set no. 21 (Mathre). Barley yellow dwarf disease description

BARLEY YELLOW DWARF - circular symptoms in field. Riesselman. Barley yellow dwarf disease description

BASAL GLUME ROT. Healthy and diseased kernels. Basal glume rot disease description

BASIDIA - American Society for Microbiology (Mathre). Basidia glossary definition

BLACK POINT - diseased kernels. Riesselman. Black point disease description

BROME MOSAIC - Virus in leaf 1 and 2, healthy leaf 3, Carroll.

C

CEPHALOSPORIUM STRIPE - "early" symptoms on leaf. Riesselman. Cephalosporium stripe disease description

CEPHALOSPORIUM STRIPE - symptoms on winter wheat plant in field - 1. Riesselman. Cephalosporium stripe disease description

CEPHALOSPORIUM STRIPE - symptoms on winter wheat plant in field - 2. Riesselman. Cephalosporium stripe disease description

CEPHALOSPORIUM STRIPE - darkened nodes in mature field plants. Mathre. Cephalosporium stripe disease description

CEPHALOSPORIUM STRIPE - White heads in field. Riesselman Cephalosporium stripe disease description.

CEPHALOSPORIUM STRIPE - Stevens wheat with 100% Cephalosporium, Pullman, WA, 1980 (Mathre). Cephalosporium stripe disease description

CLEISTOTHECIA - American Society for Microbiology (Mathre). Cleistothecia glossary description

COMMON BUNT (STINKING SMUT) - compares symptomatic and infected kernels. Riesselman. Common bunt (stinking smut) disease description

COMMON BUNT (STINKING SMUT) - symptomatic heads in field. Riesselman. Common bunt (stinking smut) disease description

COMMON BUNT - Combining bunt in the 1950's (clouds of spores). Riesselman. Common bunt (stinking smut) disease description

COMMON ROOT ROT - Healthy plant (left), symptomatic plant (right). Riesselman. Common root rot disease description

COMMON ROOT ROT - Diseased root system of Cheyenne winter wheat, Chester, MT, June 1979, Mathre. Common root rot disease description

COMMON ROOT ROT - Helminthosporium sativum conidia. Riesselman. Common root rot disease description

CONIDIA - American Society for Microbiology (Mathre). Conidia glossary description

CONIDIOPHORE, CONIDIA - American Society for Microbiology (Mathre). Conidiophore glossary description

CRINKLE JOINT - wheat. Riesselman. Crinkle joint disease description

D

DEEP PLANTING- Field shot of deep-planted wheat - 1. Riesselman. Deep planting disease description

DEEP PLANTING- Field shot of deep-planted wheat - 2. Riesselman. Deep planting disease description

DEEP PLANTING - Roots and shoots of wheat plant planted too deeply. Riesselman. Deep planting disease description

DOWNY MILDEW - Head symptoms. Riesselman. Downy mildew (crazy top) disease description

DROUGHT, WINTER INJURY - field shot of wheat affected by winter injury followed by drought. Riesselman. Drought injury disease description .....Winterkill disease description

DROUGHT - Poor wheat stand resulting from dry planting conditions, Perkins/Keith counties (state?), 1985, Riesselman. Drought injury disease description

DWARF BUNT - "field" shot of stunted plants with dwarf bunt surrounded by healthy plants. Riesselman. Dwarf bunt disease description

E

ERGOT - honeydew on barley. Mathre. Ergot disease description

ERGOT - on immature wheat head in field. Mathre (Nadadores). Ergot disease description

ERGOT - on mature wheat head. Riesselman. Ergot disease description

ERGOT - on mature wheat plant. Mathre. Ergot disease description

F

FLAG SMUT - Leaf symptoms on wheat in Washington state, 1975, Riesselman. Flag smut disease description

FLAME CHLOROSIS - Leaf symptoms - 1. Steve Haler (Canada). Flame chlorosis disease description

FLAME CHLOROSIS - Leaf symptoms - 2. Steve Haler (Canada). Flame chlorosis disease description

FOOT ROT (STRAWBREAKER) - Field symptoms in Oregon. Riesselman. Foot rot (strawbreaker, eyespot) disease description

FROST INJURY - on barley heads. Riesselman (D. Hall). Frost injury disease description

FROST INJURY - Light frost while heads are in the boot could resemble banvel injury. Riesselman. Frost injury disease description

FROST INJURY - Frosted winter wheat, Phillips Co. Jack Lang farm. Frosts May 27, June 12, June 27, seven frosts during 1969 growing season (RCC - credit?). Frost injury disease description

FROST INJURY - Jack Lang farm, Phillips Co, 1969. Riesselman (RCC). Frost injury disease description

FUNGAL SPORE TYPES -Means of identification of like a fingerprint. Riesselman. Spore glossary description

FUNGI - Three ways in which fungi enter plants to cause infections. Bacteria and viruses enter by A and B only. Riesselman.

FUSARIUM SCAB - on wheat head. Riesselman. Fusarium scab (head blight) disease description

FUSARIUM SCAB - comparison of healthy and scabby kernels. Mathre (Jacobsen). Fusarium scab (head blight) disease description

FUSARIUM SCAB - field symptoms. Riesselman. Fusarium scab (head blight) disease description

G

H

HAIL INJURY - plants in field. Riesselman. Hail injury description

HAY FIRE, Riesselman.

HYPHAE - American Society for Microbiology (Mathre). hyphae glossary description

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K

L

LEAF RUST - leaf symptoms - 1. Riesselman. Leaf rust disease description

LEAF RUST - leaf symptoms - 2. Riesselman. Leaf rust disease description

LEAF RUST - head symptoms (Mareike Johnston) Leaf rust disease description

LEAF STAGES OF WHEAT. Riesselman.

LOOSE SMUT - progressively more severe symptoms on heads. Riesselman. Loose smut disease description

LOOSE SMUT, COVERED SMUT, AND DWARF BUNT - comparison slide of three heads. Riesselman. Link to disease list

M

MELANISM (PSEUDO BLACK CHAFF, BLACK HEADS) - wheat. Riesselman. Melanism disease description

N

NITROGEN DEFICIENCY - In field at Springhill near Bozeman, MT, 1955. Riesselman. Nitrogen deficiency description

NITROGEN DEFICIENCY - Chart: How soil pH affects availibility of plant nutrients. Nitrogen deficiency description

NITROGEN TOXICITY - Liquid fertilizer burn in wheat. Riesselman. Nitrogen deficiency description (fertilizer burn)

O

OLD PHOTO OF DON MATHRE AND OTHERS IN GREENHOUSE. Mathre.

OOGONIUM - from Pythium ultimum. Mathre. Oogonium glossary description

OOSPORE - American Society for Microbiology (Mathre). Oospore  glossary description

P

PARTS OF WHEAT HEAD. Riesselman.

PERITHECIUM - American Society for Microbiology (Mathre). Perithecium glossary description

PHYSIOLOGIC LEAF SPOT - leaf symptoms Redwin winter wheat. Riesselman. Physiologic leaf spot (pinto spot) disease description

POWDERY MILDEW - early leaf symptoms. Riesselman. Powdery mildew disease description

POWDERY MILDEW - advanced leaf symptoms on barley. Mareike Johnston. Powdery mildew disease description

POWDERY MILDEW - intermediate resistant reaction on leaf. Mareike Johnston. Powdery mildew disease description

POWDERY MILDEW - conidia of Erysiphe graminis f.sp. tritici. Mathre. Powdery mildew disease description

PYTHIUM ROOT ROT - Field shot. Riesselman (Bruehl). Pythuim root rot disease description

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R

S

SCLEROTINIA SNOW MOLD - field shot of infected wheat. Mathre. Sclerotinia snow mold disease description

SEPTATE HYPHAE - American Society for Microbiology (Mathre). Septate hyphae glossary description

SEPTORIA - Leaf symptoms - 1. (Clemson Univ.) Septoria leaf and glume blotch disease description

SEPTORIA - leaf symptoms - 2. Riesselman. Septoria leaf and glume blotch disease description

SEPTORIA - Stem symptoms of S. nodorum. Joe Krupinsky, Mandan, ND. Septoria leaf and glume blotch disease description

SEPTORIA AND TAN SPOT - Comparison of leaf symptom of Septoria and tan spot on wheat. Joe Krupinsky, Mandan, ND. Septoria leaf and glume blotch disease description .....Tan spot disease description

SEPTORIA - Glume blotch on wheat head. Riesselman. Septoria leaf and glume blotch disease description

SHARP EYESPOT (Rhizoctonia) - symptoms on lower stems. Riesselman. Sharp eyespot disease description

SOILBORNE WHEAT MOSAIC - Kansas, Bill Willis. (Carroll). Soilborne wheat mosaic disease description

SOILBORNE WHEAT MOSAIC - Kansas, Bill Willis. (Riesselman). Soilborne wheat mosaic disease description

SPORANGIA - American Society for Microbiology (Mathre). Sporangia glossary description

SPORANGIA, RHIZOIDS - American Society for Microbiology (Mathre). Sporangia glossary description

STEM RUST - Classic symtoms on wheat stems in field. Mareike Johnston. Stem rust disease description

STEM RUST - Symptoms on wheat leaves in field. Mareike Johnston. Stem rust disease description

STEM RUST - Alternate host barberry, aecia on underside of leaf. Mareike Johnston. Stem rust disease description

STRIPE RUST - leaf symptoms on field plant. Mareike Johnston. Stripe rust disesase description

STRIPE RUST - Field symptoms in Switzerland. Mareike Johnston. Stripe rust disesase description

T

TAKE-ALL - Root symptoms - 1. Riesselman. Take-all disease description

TAKE-ALL - Root symptoms - 2, 1966. Mathre. Take-all disease description

TAKE-ALL - Petri plate culture, Mathre. Take-all disease description

TAKE-ALL - Runner hyphae, wheat roots, Riesselman. Take-all disease description

TAKE-ALL - Bob Johston in field of wheat infected with take-all, Lind, WA, 1971. Mathre. Take-all disease description

TAKE-ALL - Biocontrol comparisons of wheat grown in conducive and suppressive soils, Mathre. Take-all disease description

TAKE-ALL - Aerial view of field with take-all patches, Tarum (grower), Opheim, MT, 7/24/85, Mathre. Take-all disease description

TAN SPOT - Leaf symptoms. Joe Krupinsky, Mandan, ND. Tan spot disease description

TAN SPOT - Pseudothecia on wheat residue in Nebraska. Riesselman (source?). Tan spot disease description

TAN SPOT - Pyrenophora trichostroma ascospores, wheat, Riesselman. Tan spot disease description

TAN SPOT - Pyrenophora conidia from wheat, Riesselman. Tan spot disease description

TEMPERATURE BANDING - wheat. Riesselman. Temperature banding description

TYPHULA SNOW MOLD - On winter wheat in "field", Bozeman, MT, May 1975, Mathre. Typhula disease description

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WET SOIL - Rain devasted winter wheat, North of Glendive, MT, Riesselman. Wet soil/weather stress description

WHEAT - Excellent crop, Havre area, July 14, 1982. Mathre.

WHEAT CURL MITE - Wheat curl mites on wheat leaf. Riesselman. Wheat curl mite description

WHEAT CURL MITE - (electron microscope) APS - Diseases of Plants, Set no. 21. (Mathre). 85. WSMV - Virus particles (Carroll, Brumfield). Wheat curl mite description

WHEAT STREAK MOSAIC - Fig. 246. Leaf symptoms of agropyron mosaic on wheat (photo J. Slyknius) from: Common Diseases of Small Grain Cereals: A guide to identification. (Carroll). Wheat streak mosaic disease description

WHEAT STREAK MOSAIC VIRUS - Leaf symptoms. Riesselman. Wheat streak mosaic disease description

WHEAT STREAK MOSAIC VIRUS- symptomatic plants in field. Riesselman. Wheat streak mosaic disease description

WHEAT STREAK MOSAIC VIRUS - Symptoms on field margins on Alberta winter wheat. Riesselman. Wheat streak mosaic disease description

WHEAT STREAK MOSAIC VIRUS - volunteer wheat growing from last year's grain in field. Riesselman. Wheat streak mosaic disease description

WHEAT STREAK MOSAIC VIRUS - Word slide of green bridge. Riesselman. Wheat streak mosaic disease description

WIND (AND HIGH TEMPERATURE) INJURY - Wheat in Banner Co. Riesselman. Wind injury description

WINTER INJURY -Winter wheat field. Riesselman. Winterkill description

132 American Society for Microbiology (Mathre)