50%三氟吡啶胺FS对甘薯茎线虫病的田间药效评价

Field efficacy of cyclobutrifluram 50%FS against sweet potato stem nematode Disease

[目的]明确50%三氟吡啶胺FS对甘薯茎线虫病的田间防治效果,为生产应用提供理论依据。[方法]以10%噻唑膦GR为对照药剂,采用田间小区试验,在河南省汝阳县柏树乡枣林村、城关镇张河村甘薯茎线虫病重发田进行田间药效试验。[结果]50%三氟吡啶胺FS对甘薯茎线虫病具有较好的防治效果,495~990 mL/hm2范围内防效达到79.9%~89.62%,显著优于10%噻唑膦GR 15 000 g/hm2的防效,从产量上看,2个处理挽回损失率达50.70%~81.32%。[结论]50%三氟吡啶胺FS 495~990 mL/hm2能够达到防治甘薯茎线虫病的目的,可结合田间病害发生情况选择不同剂量进行防治。

[Aims] To clarify the field control effect of cyclobutrifluram 50% FS on sweet potato stem nematode disease and provide theoretical basis for the production application. [Methods] Field efficacy trials were conducted using field plot experiment with fosthiazate 10% GR as the control agent in severely affected fields by Ditylenchus destructor in Zaolin Village, Baishu Township, Ruyang County, Henan Province, and Zhanghe Village, Chengguan Town.[Results] Cyclobutrifluram 50% FS had good control effect on sweet potato stem nematode disease, with control efficacy of 79.9%-89.62% in the mass concentration range of 495-990 mL/ha, which is significantly better than that of thiazolidine 10% GR at 15 000 g/ha. From the perspective of production, the recovery loss rate reached 50.70%-81.32%.[Conclusions] Cyclobutrifluram 50% FS at 495-990 mL/ha can achieve the goal of controlling sweet potato stem nematode disease, and different doses should be selected for controlling it based on the conditions of field diseases.