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中国农学通报 ›› 2020, Vol. 36 ›› Issue (30): 120-126.doi: 10.11924/j.issn.1000-6850.casb20191100835

所属专题: 水稻

• 植物保护·农药 • 上一篇    下一篇

补骨脂种子提取物对水稻纹枯病菌生物活性测定

魏畅1(), 徐清云2, 李月娟1, 王晶1, 关丽杰1()   

  1. 1沈阳化工大学制药与生物工程学院,沈阳 110142
    2盘锦市现代农业发展中心,辽宁盘锦 124010
  • 收稿日期:2019-11-14 修回日期:2019-12-10 出版日期:2020-10-25 发布日期:2020-10-16
  • 通讯作者: 关丽杰
  • 作者简介:魏畅,女,1995年出生,辽宁沈阳人,硕士,研究方向:生物农药与生物技术。通信地址:110142 沈阳经济技术开发区11号 街沈阳化工大学,Tel:15942024129,E-mail: 1337196967@qq.com
  • 基金资助:
    沈阳市双百重大科技研发项目“生物杀菌剂苯丙烯菌酮研发”(Y17-3-002)

Psoralea corylifolia L. Extract: Effect on Biological Activity of Rice Sheath Blight

Wei Chang1(), Xu Qingyun2, Li Yuejuan1, Wang Jing1, Guan Lijie1()   

  1. 1College of Pharmaceutical and Biological Engineering, Shenyang University of Chemical Technology, Shenyang 110142
    2Panjin Modern Agricultural Development Center, Panjin Liaoning 124010
  • Received:2019-11-14 Revised:2019-12-10 Online:2020-10-25 Published:2020-10-16
  • Contact: Guan Lijie

摘要:

旨在探究补骨脂种子提取物对水稻纹枯病菌的作用活性。采用菌丝生长和菌核萌发抑制率法、扫描电镜观察、盆栽试验等手段对补骨脂提取物的抑菌活性进行研究并通过田间试验验证。补骨脂种子提取物对水稻纹枯病菌菌丝生长抑制作用的EC50为30.8159 mg/L,当浓度为810 mg/L时对菌核萌发的抑制率为43.33%,扫描电镜下补骨脂提取物作用5天后的水稻纹枯病菌菌丝体排列及形态均有明显变化。盆栽试验结果显示0.2%苯丙烯菌酮微乳剂150倍液对水稻纹枯病的预防和治疗效果分别为94%、78.46%;田间试验表明,按90 g/hm2剂量于水稻分蘖期、孕穗期和齐穗期施药3次后的防效为72.22%。补骨脂种子提取物可抑制纹枯菌丝生长、菌核萌发、破坏其形态结构,其微乳剂对水稻纹枯病具有较好的防治效果。

关键词: 水稻纹枯病菌, 补骨脂种子提取物, 苯丙烯菌酮, 抑菌活性, 防效

Abstract:

The purpose is to investigate the activity of Psoralea corylifolia L. extract on rice sheath blight. We studied the inhibition effects of Psoralea corylifolia L. extract against rice sheath blight by the hypha growth inhibition test, asclerotia germination inhibition test, SEM technologies and potted plant test, and verified the results by field trials. The results showed that EC50 value of the inhibition effect of Psoralea corylifolia L. extract on mycelium growth of rice sheath blight was 30.8159 mg/L, the inhibition rate to sclerotium germination was 43.33% at 810 mg/L. SEM observation showed that hypha arrangement and morphology changed significantly after being treated by Psoralea corylifolia L. extract for 5 days. The results of potted plant test showed that the preventive and control effect of 150 times diluted 0.2% microemulsion against rice sheath blight was 94% and 78.46%, respectively; the field trials showed that the control effect of 0.2% microemulsion was 72.22% at 90 g/hm2 after dosing once at intillering stage, booting stage and full heading stage, respectively. Psoralea corylifolia L. extract can inhibit mycelial growth and sclerotic germination of rice sheath blight, destroy its morphological structure, its microemulsion has remarkable control efficiency on rice sheath blight.

Key words: rice sheath blight, Psoralea corylifolia L. extract, isobavachalcone, antifungal activity, control effect

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