Transcript Bacterial spots and Blights The most common types of

Bacteria
Bacterial spots and Blights
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The most common types of bacterial symptom on plants are
those that appear as spots of various sizes on leaves, stems
and fruits.
Bacterial spots appear as necrotic, usually circular or
roughly circular and in some cases they are surrounded by a
yellowish halo.
In dicotyledonous plants the development of some bacterial
spots is restricted by intermediate or large veins and the
spots appear typically angulareg.Angularleafspotofcotton
Bacterial spots on leaves and stems of monocotyledonous
plants appear as streaks or strips.LEAFSTREAKOFPADDY
In leaf blight disease, the spots enlarge in size, rapidly
necrotic, and through coalescence of several small spots,
may produce large dead areas of various shapes.
Eg: Bacterial leaf spot of Tomato caused by Xanthomonas
campestris pv. vesicatoria
Bacterial leaf blight of rice caused by Xanthomonas
campestris pv. oryzae
Bacterial leaf Streak
•Long, narrow necrotic
lesions on leaves or stems
•Translucent streaks are
formed on the veins
•Band like exudates
2.Angular leaf spot
Bacterial ooze
Exudates,
consisting of
bacterial cells, on
the surface of plant
parts infected with
bacteria
Bacterial ooze
Exudates, consisting of
bacterial cells, on the
surface of plant parts
infected with bacteria
BACTERIAL BLIGHT
Bacterial Blights
BACTERIAL LEAF STREAK
5.Boll rot.
STEM INFECTION
Oil soaked lesions
VEINAL
BLIGHT
Soft rot in Carrot
Soft rot in Potato
Scab
Galls
Bacterial Wilts
Canker
CANKER
Fire Blight of Apple
Fire Blight of Apple
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