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[目的]筛选安全、高效、低毒防治冬枣炭疽病的药剂。[方法]采用菌丝生长速率法与田间试验相结合的方法,进行室内抑菌活性测定及田间小区试验。[结果]各药剂对冬枣炭疽病菌均有较好的室内抑菌活性,药后8 d EC50值为0.0246~2.1329 mg a.i./kg,3种混配剂试验配比下均表现出增效作用,且试验用量下对炭疽病的田间防效均明显优于对照药剂,尤其是40%苯醚甲环唑·咪鲜胺ME(10∶30),防效为87.64%、91.47%。各药剂对冬枣树安全。[结论]在冬枣炭疽病始发期,选用40%苯醚甲环唑·咪鲜胺ME、35%苯醚甲环唑·醚菌酯WG 400~666.7 mg/L或50%苯醚甲环唑·丙环唑ME 285.7~400 mg/L连续施药3次,对冬枣炭疽病具有较好的防治效果。
[Objective] The aim of this study was to screen the safe, efficient and low-toxic agent for controlling jujube anthracnose. [Method] The mycelium growth rate method and field experiment were combined to determine the antibacterial activity in the field and field plot test. [Result] All the medicaments had good antibacterial activities against Colletotrichum gloeosporioides in the laboratory. The EC50 value on the 8th day after drug treatment was 0.0246 ~ 2.1329 mg ai / kg, and the synergistic effects were observed under the three kinds of compounding agents. The control efficacy of anthracnose on the field was significantly better than that of the control, especially 40% difenoconazole ME (10:30). The control effect was 87.64% and 91.47% respectively. The medicinal jujube tree is safe. [Conclusion] In the initial stage of anthracnose of winter jujube, 40% difenoconazole ME and 35% difenoconazole were selected as WG 400 ~ 666.7 mg / L or 50% The azole · propiconazole ME 285.7 ~ 400 mg / L was applied three times continuously, and had good control effect on winter jujube anthracnose.