Wheat Yield Response to Foliar Fungicide Application against Leaf Rust Caused by Puccinia triticina  

作　　者：Krishna Dev Joshi Ghulam Ullah Attiq Ur Rehman Muhammad Makky Javaid Javed Ahmad Makhdoom Hussain Angela Pacheco Ibni Amin Khalil Amanullah Baloch 

机构地区：[1]International Maize and Wheat Improvement Center (CIMMYT), Islamabad 44000, Pakistan [2]Wheat Research Institute, Faisalabad 38000, Pakistan [3]International Maize and Wheat Improvement Center (CIMMYT), Texcoco, Edo. de México, CP 56130, Mexico [4]Cereal Crops Research Institute, Nowshera 24100, Pakistan

出　　处：《Journal of Agricultural Science and Technology(A)》2017年第3期160-168,共9页农业科学与技术（A）

摘　　要：A study was conducted on reducing the yield loss of wheat due to leaf rust caused by Puccinia triticina with foliar application of fungicides during the 2014-2015 and 2015-2016 growing seasons at the Wheat Research Institute in Faisalabad, Pakistan. Three fungicides： Folicur （tebuconazole） at 300 mL/ha, Nativo （tebuconazole ＋ trifloxystrobin） at 300 g/ha and Tilt （propiconazole） at 500 mL/ha were applied single or two times to Morocco and Sehar-06 wheat varieties used in the trial. The trial plots were first sprayed at the Zadok＇s scale （ZS） 3 stage and second sprayed between ZS 4.3 and 5.4 stages. The greenness of the trial crop was measured using GreenSeeker. Foliar application of fungicides significantly reduced the loss of grain yield and 1,000-grain weight （TGW） of wheat due to leaf rust in comparison to the control without fungicides application. Of the three fungicides, two times spray of Nativo reduced the grain yield loss of leaf rust susceptible mega wheat variety Sehar-06 by 45%-56% and the loss of TGW by 42%, also giving the highest marginal return in the trial. Single application of Nativo was equally effective as two times spray of Folicur in reducing the loss of wheat grain yield. Two times spray of Folicur was found to be the second choice of fungicide for reducing the yield loss of wheat. The research identified suitable fungicides for reducing the yield loss of wheat due to leaf rust and also generated important scientific knowledge required to manage a sudden outbreak of leaf rust to ensure food security.

关 键 词：Wheat variety leaf rust yield loss yield response foliar spray of fungicide resistance breeding. 

分 类 号：S435.121.4[农业科学—农业昆虫与害虫防治] S435.111.4[农业科学—植物保护]