Influence of Adjuvants on the Control of Glyphosate-Resistant Canada Fleabane and Waterhemp in Corn with Tolpyralate

• 作者: Alan J. Raedar Darren E. Robinson David C. Hooker Nader Soltani Nicole M. Langdon Peter H. Sikkema
• 来源期刊: 美国植物学期刊(英文)
• 学科: 地球科学
• 关键词: Biomass Crop Injury Density Sensitivity WEED CONTROL Yield AMARANTHUS tuberculatus Conyza CANADENSIS L. Cronq
• 年，卷（期）: 2020,（3）
• 页码范围: 354-371
• 页数: 18页
• 分类号: X59

摘要

Tolpyralate is a new benzoylpyrazole herbicide for weed management in corn. It is recommended to be co-applied with atrazine along with the adjuvants methylated seed oil concentrate (MSO) plus an ammonium nitrogen fertilizer, such as urea ammonium nitrate (UAN). Two studies were conducted on glyphosate-resistant (GR) Canada fleabane and GR waterhemp to determine if an additional adjuvant is still required when tolpyralate plus atrazine are tankmixed with a commercial glyphosate formulation (Roundup WeatherMAX®) in corn. Trials were conducted over a two-year period (2018-19) on farms in south western Ontario with confirmed GR populations. When co-applied with Roundup WeatherMAX®, the addition of MSO to tolpyralate + atrazine increased control of GR waterhemp 9%;however, there was no increase in GR Canada fleabane control from the addition of additional adjuvants. At 8 WAA, all treatments provided > 91% and > 84% control of GR waterhemp and GR Canada fleabane, respectively. This study concludes that the addition of Roundup WeatherMAX®to tolpyralate plus atrazine improves the control of GR waterhemp and GR Canada fleabane in corn.