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大黄提取液防治黄瓜白粉病的初步研究
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摘要:
对中草药大黄提取液防治黄瓜白粉病的保护活性、稳定性、持效期及押菌谱等作了初步研究。结果表明,大黄提取液的100倍液防效迭90%以上,优于粉锈宁(15%WP)1000倍液的防效(73.41%);其酸碱稳定性与热稳定性都非常强;保护作用的持效期至少可达6d;押菌谱测试结果表明,它对供试的小麦根腐病菌Cochliobolus sativus等20种真菌都表现出一定的抑制作用。
关键词:  黄瓜白粉病菌 植物提取物 抑菌活性 大黄提取液
DOI:
修订日期:2002-10-31
基金项目:河北省科技攻关项目;0122017317;
Control Effect of the Extracts from Rheum palmatum on Powdery Mildew of Cucumber
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Abstract:
In this paper, the extract from Rheum palmatum was tested for prevention effect on powdery mildew of cucumber,stability,duration of the efficacy and restraint spectrums of fungi.The results demonstrated that 100-fold Rheum palmatum extraction was effective to control the disease and its efficacy was superior to 15% WP Triadimefon 1000-fold,which was up to 90.14%. The efficacy was stable in different temperatures and pH values.The duration of the preventive efficacy of Rheum palmatum extraction to S.fuliginea could last over 6 days,and also significantly to restrain many other fungi such as Cochliobolus sativus,Exserohilum turcicum ,et al.
Key words:  powdery mildew of cucumber (Sphaerotheca fuliginea),plant extract,fungicidal activity

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