Sanogo S, Yang X B, Lundeen P
Department of Plant Pathology, Iowa State University, Ames 50011.
Plant Dis. 2001 Jul;85(7):773-779. doi: 10.1094/PDIS.2001.85.7.773.
Three-year field experiments were conducted to assess the development of sudden death syndrome (caused by Fusarium solani f. sp. glycines) in three soybean cultivars, tolerant (P9344 and A3071) and nontolerant (BSR101), to glyphosate following foliar application of four herbicides (acifluorfen, glyphosate, imazethapyr, and lactofen) commonly applied to soybeans in the north-central region of the United States. Cultivar A3071 is resistant to sudden death syndrome, whereas cultivars P9344 and BSR101 are susceptible to this disease. There was no statistically significant cultivar-herbicide interaction with respect to the severity of foliar symptoms of the disease and the frequency of isolation of F. solani f. sp. glycines from roots of soybean plants. Across all herbicide treatments, the level of sudden death syndrome was lower in the disease-resistant cultivar than in the susceptible ones. There was an increase in the disease levels under application of acifluorfen, glyphosate, and imazethapyr compared with nontreated or lactofen-treated plants. The results obtained indicate that the response of glyphosate-tolerant soybeans to sudden death syndrome is not different from the response of conventional soybeans to this disease following application of the selected herbicides, and the resistance of soybean to sudden death syndrome was not changed with application of glyphosate.
开展了为期三年的田间试验，以评估在美国中北部地区常用于大豆的四种除草剂（三氟羧草醚、草甘膦、咪草烟和乳氟禾草灵）进行叶面喷施后，三种大豆品种（耐草甘膦品种P9344和A3071以及非耐草甘膦品种BSR101）中猝死综合征（由大豆尖镰孢菌引起）的发展情况。品种A3071对猝死综合征具有抗性，而品种P9344和BSR101对此病敏感。就该病的叶部症状严重程度以及从大豆植株根部分离大豆尖镰孢菌的频率而言，不存在统计学上显著的品种 - 除草剂相互作用。在所有除草剂处理中，抗病品种的猝死综合征水平低于感病品种。与未处理或乳氟禾草灵处理的植株相比，施用三氟羧草醚、草甘膦和咪草烟后病害水平有所增加。获得的结果表明，在施用所选除草剂后，耐草甘膦大豆对猝死综合征的反应与常规大豆对此病的反应没有差异，并且施用草甘膦后大豆对猝死综合征的抗性没有改变。
