Tag Archives: Yellow rust

Disease Distribution and Physiologic Races of Wheat Yellow Rust Caused by Puccinia striiformis f. sp. tritici in North Eastern Syria.

 Alan A. Ramo*(1), Mohammad F. Azmeh(2)&Omran A. Youssef(1)

(1). Scientific Agriculture Research Center of Al Qamishly, Al Qamishly, Syria.
(2). Department of Plant Protection, Faculty of Agriculture, Damascus University, Damascus, Syria.

(*Corresponding author: Eng. Alan REMO: Scientific Agricultural Research Centre of Lattakia, Lattakia, Syria. E-mail: alan-remo@hotmail.com).

Received: 10 / 09 / 2014                       Accepted: 30 / 11 / 2014

Abstract:

Yellow rust or stripe rust caused by Puccinia striiformis f. sp. tritici is the most important fungal diseases on wheat. The disease spread in all wheat growing areas of Syria. To identify the distribution of the disease and its physiologic races, field survey have been conducted in 143 fields in 2013 and 109 fields in 2014 in different wheat growing areas in north eastern Syria. Diseased leaf samples were collected from farmers’ fields and uredeniospores were isolated from each field samples. Identification of physiologic races was performed by evaluating the reaction type of seedlings of the differential cultivars. Results of yellow rust survey showed that the distribution of disease was limited, with an infected fields’ ratio of 18.34% in 2014, while it was 40.55% in 2013. It was noticed that the infection did not appear on durum wheat during 2013 and 2014, while all infections were recorded on bread wheat. Results of race identification showed that a number of physiologic races were spread in wheat fields. Four races have been isolated and identified (6E16, 0E0, 82E16, 4E2), with race 6E16 being the most spread race during the study period, while the race 0E0 was the least spread.

Keywords: Puccinia striiformis f. sp. tritici,Survey, Syria, Wheat, Yellow rust.

Full paper in Arabic:

توزع مرض الصدأ الأصفر Puccinia striiformis f. sp. tritici على القمح وسلالاتها الفيزيولوجية في شمال شرق سورية.

Effect of Chemical Treatments Against Yellow Rust on The Infection and The Production of Wheat

Omran Youssef(1), Helim Youssef(1), Alan Ramo(1), Mahmoud Hasan(1), Sultan Shekhmous(1), Afrem Issa(1), Nawzad Suleman(1)& Abdul-Ruhman Issa(1)

(1). Al-Qamishli Agricultural Research Center, Al-Qamishli, Syria.

(Corresponding author: Dr. Omran Yousef: Al-Qamishli Agricultural Research Center, Al-Qamishli, Syria. E-mail: om_youssef@yahoo.com).

                            Received: 14 / 07 / 2014                         Accepted: 25 / 10 / 2014

Abstract:

Results of efficacy test of nine fungicides from different chemical groups in controlling yellow rust caused by Puccinia striiformisf.sp. tritici on bread wheat Cham8 in 2011 in north-eastern Syria showed disease stop with 100% efficacy of Folicure (1 l/ha) after fifth day from spray and lasted for 20 days, Nativo with 94.64% efficacy, Marlo 88.23% and Folicure (0.5 l/ha) 86.51%, then followed by Bayfidan (84.79%) and Ortiva (80.79%), while the efficacy of all other fungicides was less than 70%. The tested fungicides did not show any clear toxicity on wheat except Foliogold which recorded neil toxicity, also Score, Marlo and Bayfidan but with lesser degree. Results did not show significant difference in spike length with different fungicides compared with the control. Results showed increase in number of grains per spike and thousand grains weight (TGW) for all tested fungicide compared with the control. Increase in yield was recorded with all fungicides compared with control except Foliogold and Sodium hydrogen carbonate 5%. The higher increase in yield was recorded with Folicure at two concentrations 1, 0.5 l/ha.

Key words: Chemical control, Fungicides, Syria, Wheat, Yellow Rust.

Full paper in Arabic::تأثير المعاملات الكيميائية ضد الصدأ الأصفر على إصابة القمح وإنتاجه