| 【Objective】The pseudo-rust disease caused by Sychytrium puerariae Miy infected the leaves, petioles
and stems of Pueraria lobata, resulting in malformation of these tissues and slow growth of stems and tuberous roots,
which severely affected the yield P. lobata. The investigation was conducted to understand the occurrence of pseudo-rust
in P. lobata producing areas of Guangxi and find out effective control measures.【Method】The occurrence of pseudorust of four P. lobatas varieties bred by the research group was investigated in the promotion areas of Guangxi in 2018—
2019.【Result】The results showed that the disease index (ID) of different Pueraria varieties in the producing areas
was between 0-50.31, and there were great differences among varieties. The large leaf medicinal type Guige 18 was a
high resistant variety, with ID of 0-0.16 and average ID of 0.04. The large leaf processing type Guige 8 was a moderately
susceptible variety, with ID of 18.00-50.31 and average ID of 31.98. Both of the large leaf processing type Guige 17 and
small leaf vegetable type Guige 1 were moderately resistant varieties, with IDs of 0.10-30.79 and 6.20-30.83 and average
IDs of 16.48 and 16.77, respectively.【Conclusion】The disease severity of the Guige 18 was significantly lower than that
of the Guige 8. And the disease severity of issue culture virus-free seedlings of the same variety was significantly lower
than that of cutting seedlings. |
