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Chinese Journal Of Biological Control ›› 2020, Vol. 36 ›› Issue (3): 472-478.DOI: 10.16409/j.cnki.2095-039x.2020.03.026

• SCIENTIFIC NOTES • Previous Articles     Next Articles

Joint Control of Sesame Bacterial Wilt with Lime and Zhongshengmycin

LI Xinshen1, CHEN Jian2, XIAO Yunping2, HUANG Ruirong1, WEI Lingen2, HUA Juling1   

  1. 1. Plant Protection Institute, Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China;
    2. Soil and Fertilizer and Resources and Environment Institute, Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China
  • Received:2019-10-22 Online:2020-06-08 Published:2020-06-12

Abstract: To explore the effective prevention and control of Ralatonia solanacearumin high-density cultivation, the relationship between the pH distribution of soil and the occurrence of bacterial wilt of sesame were analyzed in Jiangxi province, the safety of quicklime soil treatment to sesame and its resistance to bacterial wilt were assessed, and a trail was carried out on the prevention and control of bacterial wilt of sesame by the combination of Zhongshengmycin spray and quicklime soil treatment. The results showed that the pH value of soil samples in the field where severe symptoms of bacterial wilt observed in sesame was concentrated in the range of 4.5-5.5, and the soil samples with pH value of 4.5-5.5 accounted for 69.17% in sesame fields.Withquicklime1125-2250 kg/hm2 soil treatment, the seedling emergence rates of Ganzhi 5 and Yuzhi 11 were not significant different from that of the blank control group. The seedling qualities of these two varieties were better than the blank control, especially root-collar diameters of these two varieties were significantly higher than the blank control. The disease index from the budding stage to the mature stage was always lower than the blank control, and the disease index from the bud stage to the initial flower stage decreased by more than 30% compared with the blank control. The soil was treated with quick lime (1125-2250 kg/hm2) before sowing, and the sesame seedlings were sprayed once for each time at a dosage of 3% Zhongshengmycin wetable power of 22.5 g.ai/hm2 at the seedling stage and the initial flowering stage. The combined control effect on bacterial wilt were 73.46%-74.89%, which was significantly higher than the control effect of 3% Zhongshengmycinalone for 3 times (P<0.05). With the combination of 3% Zhongshengmycin spray and quicklime soil treatment, the yields of sesame increased 31.33%-32.49%, which was better than that of 3% Zhongshengmycinalone.

Key words: sesame, Ralstonia solanacearum, lime, Zhongshengmycin, prevention and control

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