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R.W. Samson's Images

Organization: Purdue University
Country: United States
Web: http://www.ppdl.purdue.edu/PPDL/

46 Images of 21 Subjects View Subject List View Image Descriptions View Thumbnails

46 Images    

Page: 1/1     Display:


5402920
5402920

2,4-D
Damage
R.W. Samson

5402939
5402939

Fusarium wilt
Fusarium oxysporum f.sp. lycopersici
Symptoms
R.W. Samson

5402949
5402949

Common bacterial blight of beans, fuscous blight
Xanthomonas axonopodis pv. phaseoli
Symptoms
R.W. Samson

5402965
5402965

fungicides
Research
R.W. Samson

5402969
5402969

powdery mildew
Erysiphe cichoracearum
Sign
R.W. Samson

5402970
5402970

black rot of crucifers
Xanthomonas campestris pv. campestris
Symptoms
R.W. Samson

5402981
5402981

angular leaf spot of cucumber
Pseudomonas syringae pv. lachrymans
Symptoms
R.W. Samson

5402924
5402924

2,4-D
Damage
R.W. Samson

5402921
5402921

bacterial spot
Xanthomonas vesicatoria
Sign
R.W. Samson

5402940
5402940

late blight
Phytophthora infestans
Research
R.W. Samson

5402948
5402948

dodder
Cuscuta spp.
Infestation
R.W. Samson

5402933
5402933

Fusarium wilt
Fusarium oxysporum f.sp. lycopersici
Research
R.W. Samson

5402937
5402937

late blight
Phytophthora infestans
Symptoms
R.W. Samson

5402938
5402938

late blight
Phytophthora infestans
Symptoms
R.W. Samson

5402934
5402934

black rot of crucifers
Xanthomonas campestris pv. campestris
Symptoms
R.W. Samson

5402922
5402922

bacterial spot
Xanthomonas vesicatoria
Sign
R.W. Samson

5402929
5402929

anthracnose
Colletotrichum coccodes
Symptoms
R.W. Samson

5402928
5402928

late blight
Phytophthora infestans
Symptoms
R.W. Samson

5402925
5402925

late blight
Phytophthora infestans
Symptoms
R.W. Samson

5402926
5402926

late blight
Phytophthora infestans
Symptoms
R.W. Samson

5402927
5402927

late blight
Phytophthora infestans
Symptoms
R.W. Samson

5402980
5402980

angular leaf spot of cucumber
Pseudomonas syringae pv. lachrymans
Symptoms
R.W. Samson

5402975
5402975

common scab of potato
Streptomyces scabiei
Symptoms
R.W. Samson

5402976
5402976

smooth patch of oak
Aleurodiscus oakesii
Bark
R.W. Samson

5402952
5402952

Alternaria leaf blight
Alternaria cucumerina
Control
R.W. Samson

5402941
5402941

fungicides
Research
R.W. Samson

5402954
5402954

fungicides
Equipment
R.W. Samson

5402953
5402953

fungicides
Equipment
R.W. Samson

5402945
5402945

tomato
Lycopersicon esculentum
Research
R.W. Samson

5402956
5402956

Southern bacterial wilt
Ralstonia solanacearum (except Race 3 Biovar 2)
Symptoms
R.W. Samson

5402987
5402987

apple scab
Venturia inaequalis
Symptoms
R.W. Samson

5402985
5402985

apple scab
Venturia inaequalis
Sign
R.W. Samson

5402986
5402986

apple scab
Venturia inaequalis
Symptoms
R.W. Samson

5402966
5402966

bacterial canker and wilt of tomato
Clavibacter michiganensis ssp. michiganensis
Symptoms
R.W. Samson

5402963
5402963

apple scab
Venturia inaequalis
Symptoms
R.W. Samson

5402964
5402964

apple scab
Venturia inaequalis
Sign
R.W. Samson

5402957
5402957

Alternaria black molds / stem cankers
Alternaria spp.
Symptoms
R.W. Samson

5402919
5402919

Alternaria leaf blight
Alternaria cucumerina
Symptoms
R.W. Samson

5402984
5402984

brown spot
Alternaria alternata
Symptoms
R.W. Samson

5402983
5402983

brown spot
Alternaria alternata
Symptoms
R.W. Samson

5402982
5402982

brown spot
Alternaria alternata
Symptoms
R.W. Samson

5402979
5402979

brown spot
Alternaria alternata
Symptoms
R.W. Samson

5402968
5402968

anthracnose
Colletotrichum orbiculare
Symptoms
R.W. Samson

5402967
5402967

anthracnose
Colletotrichum orbiculare
Symptoms
R.W. Samson

5402958
5402958

Alternaria black molds / stem cankers
Alternaria spp.
Symptoms
R.W. Samson

5402955
5402955

angular leaf spot of cucumber
Pseudomonas syringae pv. lachrymans
Symptoms
R.W. Samson

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