三氯异氰尿酸与DW8联用对烟草青枯病防治效果的研究

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中图分类号：S481.8 文献标识码：A文章编号：2097-1354（2025）06-0046-12

基金项目：烟草根际健康与根茎病害精准调控技术研发与应用（2025JD0001）。

作者简介：张学杰，硕士，助理农艺师。

Abstract： To evaluate the efficacy of combined application of trichloroisocyanuric acid （TCCA） and microbial agent DW8 on control of tobacco bacterial wilt，field trials with tobacco cultivar Yunyan 121 as research material were conducted with four treatments： TCCA，DW8， TCCA+ DW8 and control. We assessed the disease incidence，measured tobacco agronomic traits，and analyzed the rhizosphere microbiome structure and function during the peak period of disease. The results showed that TCCA+DW8 combination can effectively control the tobacco bacterial wilt disease，with relative control efficacy of 66.57% . Both TCCA + DW8 and DW8 alone significantly restructured the rhizobacterial communities，in which，DW8 treatment enriched the beneficial bacterial such as genera of Bacillus and Streptomyces ，and suppressed pathogen-associated Fusarium. This shift established a disease-suppressive microbiome conducive to plant growth and resistance. In conclusion，soil disinfection with TCCA combined with the microbial agent DW8 is an effective strategy for the control of tobacco bacterial wilt. This integrated approach provides theoretical basis and technical support for the green control of soil-borne tobacco diseases.

Key words：bacterial wilt；soil disinfectants；microbial agent

烟草青枯病是由青枯雷尔氏菌（Ralstonia solanacearum）引起的严重土传病害[1]，该病害突发性强、传播速度快、破坏力大，可对全球范围内的烟草、马铃薯、番茄、茄子、辣椒等茄科经济作物构成巨大威胁，严重影响农业生产与食品安全[2-3]。（剩余12652字）