Using soybean chaff lining to manage waterhemp (<i>Amaranthus tuberculatus</i>) in a soybean–corn rotation
نویسندگان
چکیده
Abstract Waterhemp ( Amaranthus tuberculatus [Moq.] Sauer) escapes are common in midwestern U.S. soybean [ Glycine max (L.) Merr.] fields due to the continued rise herbicide-resistant (HR) populations. In a conventional harvesting system, weed seeds harvested with crop grain and spread back on field. Harvest seed control methods such as chaff lining concentrate seed-bearing into narrow row (chaff line). These lines (30- 50-cm wide) undisturbed following growing seasons, under assumption that line creates an environment less favorable for germination survival. Field experiments were conducted soybean–corn Zea mays L.) rotation 2020 2021 Ames, IA, Roland, quantify effectiveness of managing A. seeds. About 70% retained mother plant at harvest 2020. The system concentrated more than 99% exiting combine line. Although population density was 76% higher inside outside line, aboveground biomass 63% lower 12 wk after corn planting. Similarly, had delayed emergence compared Application preemergence herbicides by 2 Additionally, follow-up postemergence herbicide application needed only manage , suggesting possibility overall use. results support implementing soybean-based systems Midwest help HR seedbanks.
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ژورنال
عنوان ژورنال: Weed Science
سال: 2023
ISSN: ['0043-1745', '1550-2759']
DOI: https://doi.org/10.1017/wsc.2023.34