Sheath brown rot disease of rice caused by Pseudomonas fuscovaginae in the Peninsular Malaysia

• Autorzy: Razak A A , Zainudin N.A.I.M. , Sidiqe S.N.M. , Ismail N.A. , Mohamad N.M.I.N. , Salleh B.

Warianty tytułu

PL

Brazowa zgnilizna pochew lisciowych ryzu wywolywana przez Pseudomonas fuscovaginae na Polwyspie Malajskim

• Języki publikacji: EN

Abstrakty

EN

Relative to the established and well 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.

PL

Brązowa zgnilizna pochew liściowych ryżu wywoływana przez Pseudomonas fuscovaginae może być uznana w porównaniu do innych, powszechnie występujących i dobrze znanych chorób ryżu za nową, ale rozprzestrzeniającą się i ważną na całym świecie. Podjęte badania miały na celu monitorowanie i zbadanie jej występowania, i znaczenia na Malajach. W celu określenia występowania i nasilenia choroby wykonano seryjny monitoring oraz przeprowadzono pobieranie prób. Wykonano analizy labolatoryjne zebranych roślin w celu określenia sprawcy choroby. Przeprowadzono testowanie wybranych odmian ryżu pod kątem ich odporności na patogena celem ograniczenia jego występowania. Wykazano, że choroba nabiera znaczenia i często występuje we wszystkich rejonach uprawy ryżu na półwyspie Malajskim. W polu zakażone rośliny żółkną, dolna pochwa liściowa staje się jasno- i ciemnobrązowa, a ziarno wytworzone przez chorą roślinę jest przebarwione, zniekształcone i puste. Najczęstsze występowanie choroby zanotowano w stanie Pahang (62%) i Selangor (62%), podczas gdy najsilniejsze porażenie stwierdzono w Pahang (55%0 i Terengganu (61%). Ocena odporności odmian wykazała, że patogen porażał naturalnie wszystkie odmiany ryżu, w zróżnicowanym stopniu. Kilka odmian zaklasyfikowano jako średnio odporne, t.j.: MR240, MR243, MR244, MR245, MR246, MR248 i MR 249, mogło być polecane do sadzenia w następnym sezonie wegetacyjnym.

Słowa kluczowe

PL

sheath brown rot disease; plant disease; rice; bacterial disease; resistant variety; Malaysia; Pseudomonas fuscovaginae

• Wydawca: -
• Czasopismo: Journal of Plant Protection Research
• Rocznik: 2009
• Tom: 49
• Numer: 3
• Opis fizyczny: p.244-249,fig.,ref.

Twórcy

autor

Razak A A

• Malaysian Agricultural Research and Development Institute, Seberang, Perai Research Station, 13200 Kepala Batas, Pulau Pinang, Malaysia

autor

Zainudin N.A.I.M.

autor

Sidiqe S.N.M.

autor

Ismail N.A.

autor

Mohamad N.M.I.N.

autor

Salleh B.

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