李月娟 关丽杰

摘 要：黄瓜细菌性角斑病是一种由丁香假单胞杆菌（Pesudomonas syringae pv.lachrymans）引起的细菌性病害，对黄瓜生产造成严重影响。为探究植物源杀菌剂补骨脂种子提取物对黄瓜细菌性角斑病的田间防治效果，按照田间药效试验准则在海南省海口市、浙江省绍兴市、陕西省西安市和辽宁省凌源市进行了田间药效试验。结果表明，补骨脂种子提取物微乳剂0.6～2.4 g a.i./hm2剂量处理对黄瓜细菌性角斑病的防效达61%～83%，相当于或优于对照药剂6%春雷霉素可溶液剂，其中在陕西省西安市防效最优。试验期间供试剂量范围内对黄瓜安全，无不良影响，可在田间大面积推广使用。建议在发病前或发病初期，按1.2～2.4 g a.i./hm2剂量视病害发展情况间隔7～10 d连续施药3次。

关键词：植物源农药;补骨脂种子提取物;黄瓜细菌性角斑病;田间防效

中图分类号：S482.2

文献标识码：A

文章编号：1008-0457（2021）03-0083-05

国际DOI编码：10.15958/j.cnki.sdnyswxb.2021.03.014

Field Control Effect of Microemulsion of Psoralea corylifolia L.Extract Against Pesudomonas Syringae pv.lachrymans

LI Yuejuan，GUAN Lijie*

（Shenyang University of Chemical Technology，Shenyang，Liaoning 110142，China）

Abstract：

Cucumber bacterial angular leaf spot is a bacterial disease caused by Pesudomonas syringae pv.lachrymans，which has a serious impact on cucumber production.In order to explore the field control effect of the microemulsion of Psoralea corylifolia L.extract to P.syringae pv.lachrymans，the efficacy evaluation of pesticides was conducted in the field in Haikou City，Shaoxing City，Xian City and Lingyuan City.The results showed that the control efficacy of 0.6～2.4 g a.i./hm2 microemulsion of P.corylifolia extract on P.syringae pv.lachrymans could reach 61%～83%，especially in Xian City，which was equivalent to or even better than that treatment by 6% kasugamycin.The range of test dosage had no adverse effect on cucumber during the experiment.It is recommended that microemulsion of P.corylifolia extract can be widely used in farmland before or at early onset of P.syringae pv.lachrymans，at 1.2～2.4 g a.i./hm2 dose which should be applied 3 times at intervals of 7～10 d depending on the development of the plant disease.

Keywords：

Botanical pesticide; Psoralea corylifolia L.extract; Pesudomonas syringae pv.lachrymans; field efficacy

黄瓜是我国主要蔬菜品种之一。黄瓜细菌性角斑病是一种由丁香假单胞桿菌黄瓜致病变种（Pesudomonas syringae pv.lachrymans）引起的细菌性病害，在20世纪初被Carsener[1]首次报道。黄瓜细菌性角斑病在黄瓜整个生育期几乎都会发生，大都危害茎蔓、卷须、叶片和叶柄，有时也会危害到果实，造成50%以上的损失，对黄瓜安全生产造成严重威胁[2-3]。如何有效的控制该病害的蔓延成为生产中的突出问题[4]。目前，防治农作物细菌性病害的杀菌剂主要包括铜制剂，农用抗生素如链霉素、春雷霉素，叶枯唑系列杀菌剂等，方便、快捷、高效的特点使其在作物防治上广泛应用[5-7]。……