Table 1.
Location and description of sampling sites
| Abbreviation | Location | Variety/Rootstock | Training system | Tree age (y) | Farming system | Identified phytoplasma types* |
|---|---|---|---|---|---|---|
| THA | Lower Austria; Thallern | Bosc/Fox11 | Hedge, stem height 50–60 cm | 4 | Integrated |
ATPYR1 ATPYR2 ATPYR5 ATPYR7 |
| RUE1 | Lower Austria; Rührsdorf | Williams/rootstock unknown | Standard tree, pyramidal shape, stem height 120 cm | 30 | Extensive | ATPYR5 |
| RUE2 | Lower Austria; Rührsdorf | Williams/rootstock unknown | Hedge, stem height 50–60 cm | 10 | Extensive | ATPYR7 |
| RUE3 | Lower Austria; Rührsdorf | Williams/rootstock unknown | Standard tree, pyramidal shape, stem height 120 cm | 4 | Extensive | ATPYR9 |
| HH | Lower Austria; Haschhof, Klosterneuburg | Perry pear varieties/ Pyrodwarf, quince A, Kirchensaller | Standard tree, pyramidal shape, stem height 120 cm | 5–20 | Organic |
ATPYR6 ATPYR9 ATPYR11 ATPYR12 ATPYR13 ATPYR14 ATPYR15 |
| WB | Lower Austria; Wilhelmsburg |
Williams/ Pyrodwarf |
Spindle, stem height 40–50 cm | 6 | Integrated |
ATPYR2 ATPYR9 |
| Große Landbirne/BA29 | Spindle, stem height 40–50 cm | 6 | ||||
| Schweizer Wasserbirne/BA29 | Spindle, stem height 40–50 cm | 6 | ||||
| Speckbirne/pear seedling | Standard tree pyramidal shape, stem height 180 cm | 24 | ||||
| RIE | Upper Austria; Ried i.d. Riedmark | Pichlbirne, Schweizer Wasserbirne, Grüne Wilawitzl/rootstocks unknown | Standard tree pyramidal shape, stem height 180 cm | Different tree ages | Extensive |
ATPYR6 ATPYR9 |
| GRO | Styria, Großwilfersdorf | Abbe Fetel/-rootstock not assessed | Spindle, stem height 40–50 cm | 5 | Integrated | ATPYR8 |
*Phytoplasma genotypes as described in Table 5