Bacterial Soft rot potato: Erwinia carotovora subsp caratovora
Symptom:
Infection at two phases is blackleg and soft rot.
The black lesion appears on the...
Brown rot or Bangle blight: Ralstonia solanacearum
Symptom:
At the time tuber formation wilt is the main characteristic symptom.
In leaf symptom...
Common scab or corkey scab: Streptomyces scabies
Symptom:
Corkiness of the tuber periderm is the characteristics symptoms.
1/4 inch into the tuber...
Black scurf: Rhizoctonia solani
Symptom:
Black speck, black speck scab, russet scab on tubers.
At the time of sprouting dark brown colour...
Post-harvest tuber rots: Sclerotium rolfsii
Symptom:
Wilting is the initial symptom.
Yellowish brown coloured Sclerotia appeared on the infected tuber.
Rotting of...
Early blight of potato: Alternaria solani
Symptom:
It is present in both hills & plains.
Brown-black necrotic spot-angular, an oval shape characterized...
Late blight of potato: Phytopthora infestans
Symptom:
It affects leaves, stems and tubers.
Water soaked spots appear on leaves, increase in size,...
Onion Purple blotch: Alternaria porri
Symptom:
This disease occurs mainly at the top of the leaves, the infection starts with whitish minute...
Onion White Rot: Sclerotium cepivorum
Symptom:
The leaves become yellow and die-back and when the plants are pulled up, roots are found to...
Onion Smut: Urocystis cepulae
Symptom:
Black smut sori are seen at the base of the leaves and leaf surface.
Black powdery mass...
Onion Pythium root rot: Pythium aphanidermatum, P. debaryanum and P. ultimum
Symptom:
This disease causes seed rotting, pre-emergence damping off. The disease appears in circular...
Onion Leaf Blight (Blast): Botrytis spp.
Symptom:
Botrytis is the major disease of onions in cool climate areas.
Light infections do not affect yields...
