New Update Bacterial leaf blight of rice

B.Sc.Ag. (Hons) Part-III    

 Bacterial leaf blight of rice. https://cststudy.blogspot.com

 Bacterial leaf blight of rice  


Occurrence/distribution: 

The most common BLB of rice caused by Xanthomonas oryzae. BLB   of rice are probably world in distribution.

 Symptoms: 

The symptoms appear on leaf blade and sheaths as small linear, water-soaked areas   that soon elongated and coalesce into irregular, narrow, yellowish or brownish stripes. Severe   infection cause leaves to turn yellow and die from the tip to downward. They also retard spike   elongated and cause blishing. Small lesion from on the karnels as well.

 Recurrence of the disease: 

The disease develops mainly in rainy, dam wheather. The bacteria over wintering on the seed and crop residuces and are spread by rain, direct contact an insect.

 Control measure: 

The main control measures are use of disease free or treated seeds and crop   rotation



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