Bacterial Blight of rice ppt

1. Bacterial Blight of Rice

2. • Host Plant: Rice
• Causal Organism : Xanthomonas
oryzae (Bacteria).
• What it does..
• It causes wilting of seedlings, yellowing
and drying of leaves.

3. Why is it important..
 Bacterial blight is one of the most serious diseases of
rice.
 The earlier the disease occurs, the higher the yield loss.
 Yield loss due to bacterial blight can be as much as 70%
when susceptible varieties are grown, in environments
favorable to the disease.

4. • Symptoms:
• An infected leaf has yellow water soaked lesions at the margin of
its leaf blade
• Bacterial discharge appears on young lesion early in the morning
that looks like a milky dewdrop.
• On older plants, lesions usually develops as water-soaked to yellow-
orange stripes on leaf blades or leaf.
• As the disease progresses, the leaf dries-up with white lesions and
the leaf blade has wavy margins.
• The whole leaf may eventually be affected, becoming whitish or
greyish and then dying .

5. How To Manage:
 Planting resistant varieties is efficient way to control
bacterial blight.
 Use balanced amounts of plant nutrients, especially
nitrogen.
 Ensure good drainage of fields and nurseries.
 Keep fields clean. Remove weed hosts and plow under
rice stubble , straw which can serve as hosts of bacteria.
 Allow fallow fields to dry to suppress disease agents in
the soil and plant residues.

6. Thank you..
 Name : Lakhveer Singh
 Class: B.sc Agriculture 3rd
year
 Roll No. 48216

7. Thank you..
 Name : Lakhveer Singh
 Class: B.sc Agriculture 3rd
year
 Roll No. 48216