College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing 163319, China.
College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing 163319, China.
Plant Dis. 2023 Dec;107(12):3943-3951. doi: 10.1094/PDIS-12-22-2829-RE. Epub 2023 Dec 13.
Crop pathogen infections can lead to substantial economic losses, but biocontrol, an environmentally friendly approach, can be used to control infections. For the biological management of potato scab disease, we assessed the potential use of as a biocontrol agent. K-9 inhibited up to 44.90% of the infection caused by , the causative agent of potato scab. Treatment of the -infected potato plants with K-9 resulted in a significant reduction in the depth of the disease lesions compared with the untreated infected potato plants. In a radish seedling test, the K-9 culture and cell-free filtrate significantly reduced ( < 0.05) potato scab disease symptoms, suggesting that the strain K-9 was able to reduce pathogenesis on potatoes. In a field test, the disease and scab indexes for K-9 against potato scab were significantly different from the control. In 2021, the potato yield for the K-9-treated plants was 12.44% higher than that for the control plants. In 2022, the potato yield following K-9 treatment increased by 12.65% compared with the control. In conclusion, K-9 prevented potato scab and increased potato yield. Thus, K-9 substantially reduced the occurrence of potato scab and could be used as a potential biocontrol agent for the management of potato scab.
作物病原体感染会导致重大经济损失，但生物防治作为一种环保方法可用于控制感染。为了对马铃薯疮痂病进行生物防治管理，我们评估了 作为生物防治剂的潜在用途。K-9 抑制了 引起马铃薯疮痂病的病原菌的感染高达 44.90%。与未处理的感染马铃薯植株相比，用 K-9 处理感染的马铃薯植株导致疾病病变的深度显著降低。在萝卜幼苗试验中，K-9 培养物和无细胞滤液显著降低（<0.05）了马铃薯疮痂病症状，表明该菌株 K-9 能够减少马铃薯上的 致病性。在田间试验中，K-9 对马铃薯疮痂病的防治效果与对照差异显著。2021 年，经 K-9 处理的植株的马铃薯产量比对照植株高 12.44%。2022 年，与对照相比，K-9 处理后的马铃薯产量增加了 12.65%。总之，K-9 可预防马铃薯疮痂病并提高马铃薯产量。因此，K-9 大大减少了马铃薯疮痂病的发生，可作为马铃薯疮痂病管理的潜在生物防治剂。
