EPPO Global Database

EPPO Reporting Service no. 09 - 2021 Num. article: 2021/201

Update on the situation of Pantoea stewartii subsp. stewartii in Italy

In Italy, the bacterial wilt of maize caused by Pantoea stewartii subsp. stewartii (EPPO A2 List) had been found in several regions but was subsequently eradicated (EPPO RS 2020/130). The pathogen was found again in 2020 and 2021 during official surveys of maize (Zea mays) grown for seed in Emilia-Romagna region. At least 10% of the seed crops (5615 ha) were inspected. In 2021, 36 samples with suspect symptoms were taken and tested according to EPPO protocol PM 7/60. Two samples were positive, one in the municipality of Imola (Bologna province), and one in the municipality of Comacchio (Ferrara province). The plants within 1.5 m radius around the positive plants were uprooted and destroyed. Before harvesting, at 30% seed humidity, maize cobs will be collected in the affected area and tested to verify the absence of the pathogen before marketing the seed.

The pest status of Pantoea stewartii subsp. stewartii in Italy is officially declared as: Transient, actionable, under eradication.


NPPO of Italy (2021-07).