ORIGINAL ARTICLE
Sheath brown rot disease of rice caused by Pseudomonas fuscovaginae in the Peninsular Malaysia
 
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1
Malaysian Agricultural Research and Development Institute, Seberang Perai Research Station 13200 Kepala Batas, Pulau Pinang, Malaysia
2
Biology Department, Faculty of Science, University Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
3
Agrotechnology Department, Faculty of Agrotechnology and Food Science, University Malaysia Terengganu, Mengabang Teilpot 21030 Kuala Terengganu, Terengganu, Malaysia
4
School of Biological Sciences, University Sains Malaysia, 11800 Minden, Pulau Pinang, Malaysia
CORRESPONDING AUTHOR
Azmi Abd Razak
Malaysian Agricultural Research and Development Institute, Seberang Perai Research Station 13200 Kepala Batas, Pulau Pinang, Malaysia
 
Journal of Plant Protection Research 2009;49(3):244–249
KEYWORDS
TOPICS
ABSTRACT
Relative to the established andwell known rice diseases, sheath brown rot caused by Pseudomonas fuscovaginae can be considered new but getting widespread and serious all over the world. Our research was aimed to monitor and quantify the incidence and importance of the disease in Malaysia. A series of field monitoring and sampling were conducted to quantify the incidence and severity of the disease. Laboratory analysis of the collected diseased plant was done to identify the causal organism. Disease resistance screening of selected rice cultivars were also conducted to overcome the problem. The disease was found to become more important, prevalent and widely spread throughout rice growing areas in Peninsular Malaysia. Infected plants in the field became yellowish, lower leaf sheaths turned light or dark brown, while grains produced by an infected plant were discoloured, malformed and empty. The highest disease incidence was recorded in the state of Pahang (62%) and Selangor (62%), while the most severe infection was recorded in Pahang (55%) and Terengganu (61%). The evaluations of varietal resistance evaluation showed that the pathogen naturally infected all tested rice varieties at different levels of infection. Several rice varieties i.e. MR240, MR243, MR244, MR245, MR246, MR248 and MR249, classified as moderately resistant to the disease, could be recommended for planting in the next planting season
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
 
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