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在直播和移栽条件下研究2.4%藜芦碱.阿维AS防治根结线虫的药效。试验结果表明:播种处理,以3 000 mL/hm2制剂用量播前土壤处理效果较好,防效可达66.16%,但整体效果较差。移栽处理,灌根处理用药后20 d调查,有效成分24、12 mg/kg处理感病株率均为0,与清水对照相比,防效均为100%;喷雾处理用药后20 d调查,24、12 mg/kg处理感病株率分别为13.33%和20.00%,防效分别为84%和76%,差异极显著。用药后40 d调查,所有处理感病株率明显增加,与清水对照相比差异显著,但防效均明显下降。生产上建议用有效成分24~12 mg/kg灌根或喷雾处理,用药间隔期20~30 d。
2.4% veratridine was studied under direct seeding and transplanting conditions. Avian AS was used to control root knot nematode. The results showed that sowing treatment with 3 000 mL / hm2 dosage of pre-sowing soil treatment effect is better, the control effect of up to 66.16%, but the overall effect is poor. Transplanting treatment, irrigation treatment 20 d after dosing, effective components 24,12 mg / kg treatment of susceptible strain rate were 0, compared with water control, control effect was 100%; 20 d after spraying treatment investigation , While the rates of susceptible plants treated with 24 and 12 mg / kg were 13.33% and 20.00%, respectively. The control effects were 84% and 76%, respectively, with significant differences. After 40 days of treatment, all the susceptible strains were significantly increased compared with the control, but the control effect was significantly decreased. Production recommendations with the active ingredient 24 ~ 12 mg / kg root irrigation or spray treatment, drug interval 20 ~ 30 d.