Potato Diseases Page 3 of 3            
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Gangrene (Phoma) and Dry rot (Fusarium)

Gangrene POTDIS27

Dry rot-cut tuber
POTDIS28

Dry rot-whole tuber
POTDIS29
Pink Rot

Pink Rot- cut tuber POTDIS30
   
Rhizoctonia

Rhizoctonia-black scurf
POTDIS68

Black scurf POTDIS32

Black scurf POTDIS33

Stem canker- aerial tubers POTDIS34

Stem canker-lower stem POTDIS35

Rhizoctonia-tuber surface effects-elephant hide POTDIS36

Rhizoctonia-tuber surface effects-small depression POTDIS37

Rhizoctonia-tuber surface effects-splits and cracks POTDIS38

Tubers forced to surface by stem canker POTDIS31
Skin spot

Skin spot on tuber surface of
K Edward POTDIS39

Skin spot on tuber surface of
K Edward POTDIS40

Skin spot on lower stems POTDIS41

Skin spot on lower stems POTDIS42
   
Silver Scurf

Silver scurf POTDIS43

Silver scurf POTDIS44

Silver scurf POTDIS45
Scab
     

Common scab POTDIS47

Common scab POTDIS54

Common scab on red variety POTDIS70

Powdery scab POTDIS46

Powdery scab POTDIS66

Powdery scab POTDIS67
Sclerotinia

Sclerotinia stem lesions POTDIS48

Sclerotinia stem lesions POTDIS49

Sclerotinia stem lesions POTDIS65
Violet root root

Violet root rot POTDIS50

Violet root rot POTDIS51
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