文献类型：期刊文献

英文题名：Efficacy of Rheum officinale liquid formulation on cucumber powdery mildew

作者：Yang, Xiaojun[1,2] Ma, Xingxia[3] Yang, Lijun[2] Yu, Dazhao[2] Qian, Yixin[4] Ni, Hanwen[1]

第一作者：Yang, Xiaojun

通信作者：Ni, HW[1]

机构：[1]China Agr Univ, Coll Agron & Biotechnol, Beijing 10094, Peoples R China;[2]Hubei Acad Agr Sci, Inst Plant Protect & Soil Sci, Wuhan 430064, Peoples R China;[3]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[4]Beijing Kingbo Biotechnol Co Ltd, Beijing 100020, Peoples R China

年份：2009

卷号：28

期号：12

起止页码：1031-1035

外文期刊名：CROP PROTECTION

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000271610100002)】；

基金：This research was supported in part by the grant from the China National Key Project of the 11th Five-Year Plan. We thank senior plant pathologists Mr. Wang Lixin of Inner Mongolia Plant Protection Station and Mr. Chen Bo of Beijing Plant Protection Station for their technical supports.

语种：英文

外文关键词：Rheum officinale liquid formulation; Physcion; Podosphaera xanthii; Efficacy

摘要：Rheum officinale liquid formulation, the ethanol extract from roots of R. officinale Baill., formulated as physcion 5 g l(-1) aqueous solution (AS), has been commercialized in China for controlling cucumber powdery mildew (Podosphaera xanthii (Castagne) U. Braun & Shishkoff). The efficacy of the product was evaluated in pot tests under controlled conditions and in open and protected fields in China over 2 years. In most trials, the efficacy reached above 80% at the rates of 10-50 mg a.i l(-1) water after three applications and at the rates of 20-50 mg a.i l(-1) water after two applications. The cucumber fruit yield in the product treatment was as many or more as triadimefon treatment, and over 53.1% compared to the untreated control. These results showed that Chinese rhubarb extract could be an effective alternative plant protecting agent in the integrated and biological management of cucumber powdery mildew. (C) 2009 Elsevier Ltd. All rights reserved.