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Table 3 Infection types (ITs) of Puccinia striiformis f. sp. tritici isolates recovered from aeciospores on barberry (Berberis shensiana) seedlings

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

Grass species

Number of

Leaf segment

Aecia

Single aecium

Infection typesa

1 and 2

3 and 4

Agropyron cristatum

26

60

227

4

4

Elymus cylindricus

9

339

1485

22

48

Total

35

399

1712

26

52

  1. aInfection types (ITs) were determined based on a 0-to-4 scale (Hungerford and Owens 1923). ITs 1 and 2 are considered as avirulent; and ITs 3 and 4 are considered as virulent