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Asian Journal of Plant Sciences
  Year: 2003 | Volume: 2 | Issue: 7 | Page No.: 548-550
DOI: 10.3923/ajps.2003.548.550
 
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Inoculum Build up of Bacterial Blight of Rice in Rice-Wheat Cropping Area of Punjab in Relation to Zero Tillage?

Muhammad Afzal Akhtar, Muhammad Zakria and Fida Muhammad Abbasi

Abstract:
Bacterial blight (BB) of rice caused by Xanthomonas oryzae pv. oryzae is creating alarming situation in rice wheat system of Punjab in recent years. The observation recorded during surveys of rice in Punjab conducted during 1999 and 2002 showed that Super basmati is the major rice variety under cultivation in these areas. The mean incidence of disease in the month of September, 1999 was 25, 28, 15 and 29 % in Hafizabad, Sheikhupura, Gujranwala and Gujrat districts, respectively. During the recent survey in the year 2002 the mean incidence was 64, 43, 36, 34, 28, 41, 55, 45, 55 and 47 % in Sargodha, Hafizabad, Sheikhupura, Sialkot, Narowal, Gujranwala, Gujrat, Lahore, Kasur and Okara, respectively. The highest severity of BB was in the range 1-3 at Hafizabad and the lowest 0-1 in Gujranwala during 1999 and while in 2002 it was highest in the range of 0-9 in Gujranwala and lowest 0-3 in Gujrat, Lahore and Kasur, respectively. Bacterial Blight showed increasing trend with lapse of time of 3-4 years. The disease may create havoc in next couple of years as super basmati is mainly cultivated in this area and it is badly hit with this menace. Secondly as the area under zero tillage cultivation is increasing there are chances of inoculum buildup on the stubbles in the zero tillage fields. Therefore there is a need to investigate the survival mechanism of this bacterium in relation to zero tillage.
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How to cite this article:

Muhammad Afzal Akhtar, Muhammad Zakria and Fida Muhammad Abbasi , 2003. Inoculum Build up of Bacterial Blight of Rice in Rice-Wheat Cropping Area of Punjab in Relation to Zero Tillage?. Asian Journal of Plant Sciences, 2: 548-550.

DOI: 10.3923/ajps.2003.548.550

URL: https://scialert.net/abstract/?doi=ajps.2003.548.550

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