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Table 1 Puccinia striiformis f. sp. tritici (Pst) isolates from grass leaf samples (with uredia) collected in Tianshui, Gansu Province, China

From: Grasses are able to harbor the oversummering of urediospores and the overwintering of teliospores of Puccinia striiformis f. sp. tritici in China

Sampling sites Grass species No. of samples inoculated No. of samples producing necrotic or immune reaction on wheat cv. Mingxian 169 No. of samples recovering Pst isolatesa Percentageb (%) Yearc
Chenjiazhuang, Qishou Agropyron cristatum 174 155 19 10.9 2012
Pingnan, Qinzhou A. cristatum 56 51 5 8.9 2013
Pingnan, Qinzhou A. cristatum 70 68 2 2.9 2013
Pingnan, Qinzhou A. cristatum 24 23 1 4.2 2013
Pingnan, Qinzhou A. cristatum 190 182 8 4.2 2012
Shuidonggou, Wushan A. cristatum 66 65 1 1.5 2012
Shuidonggou, Wushan A. cristatum 20 16 4 20.0 2013
Pingnan, Qingzhou Elymus cylindricus 204 185 19 9.3 2013
Pingnan, Qingzhou E. cylindricus 320 302 18 5.6 2013
Pingnan, Qingzhou E. cylindricus 53 29 24 45.3 2013
Pingnan, Qingzhou E. cylindricus 266 150 116 43.6 2013
Pingnan, Qingzhou E. cylindricus 109 107 2 1.8 2013
Tongjiamo, Taijing, Qingzhou E. cylindricus 66 65 1 1.5 2013
Baizhai, Daimen E. excelsus 242 198 44 18.2 2012
Laojunshan, Wushan E. excelsus 35 33 2 5.7 2012
Lvjiapo, Daimen E. excelsus 17 13 4 23.5 2013
Lvjiapo, Daimen E. excelsus 54 53 1 1.9 2013
Lvjiapo, Daimen E. excelsus 33 31 2 6.1 2013
Nanyu, Tianshui E. excelsus 74 70 4 5.4 2012
Xujiadian, Zaojiao, Qingzhou E. excelsus 83 82 1 1.2 2012
Baizhai, Daimen E. excelsus 28 27 1 3.6 2013
Total   2184 1905 279 12.8  
  1. aThis indicates stripe rust-infected grass samples that produce uredia on leaves of highly susceptible wheat cultivar Mingxian 169 seedlings with infection types from 1 to 4 after inoculation
  2. bPercentage (%) = (the number of samples recovering Pst isolates/the number of samples inoculated) × 100
  3. cSampling was carried out from September to October in 2012, and August to October in 2013