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

Table 2 Infection types (ITs) of Puccinia striiformis f. sp. tritici isolates (from grass plants with uredia) on highly susceptible wheat cultivar Mingxian 169

Samples	Low infection types^a		High infection types		Total
Samples	IT 1	IT 2	IT 3	IT 4	Total
Number	192	24	21	42	279
Percentage (%)	68.8	8.6	7.5	15.1	100

^aInfection type was determined based on a 0-to-4 scale described by Hungerford and Owens (1923)