Response of Asiatic dayflower (Commelina communis L.) to glyphosate and alternatives in soybean
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The Department of Agronomy seeks to teach the study of the farm-field, its crops, and its science and management. It originally consisted of three sub-departments to do this: Soils, Farm-Crops, and Agricultural Engineering (which became its own department in 1907). Today, the department teaches crop sciences and breeding, soil sciences, meteorology, agroecology, and biotechnology.
History
The Department of Agronomy was formed in 1902. From 1917 to 1935 it was known as the Department of Farm Crops and Soils.
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1902–present
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- Department of Farm Crops and Soils (1917–1935)
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- College of Agriculture and Life Sciences (parent college)
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Abstract
Greenhouse experiments were conducted to evaluate Asiatic dayflower ( Commelina communis L.) tolerance to glyphosate. Glyphosate rates and growth stages of Asiatic dayflower were evaluated. Shikimate accumulation in Asiatic dayflower, glyphosate resistant (GR) and non-GR maize and soybean cultivars was estimated. Field research was conducted to evaluate herbicides for Asiatic dayflower control. Pre-emergent and post-emergent herbicides were applied. Under greenhouse conditions, a single application of glyphosate (0.84 kg ae ha-1) did not affect the growth of or shikimate accumulation in Asiatic dayflower. At an early growth stage (2 leaves), 3.36 kg ae ha -1 glyphosate provided 28% control. Susceptible maize and soybean and also Asiatic dayflower accumulated shikimate after glyphosate application. However, only Asiatic dayflower plants survived. In field experiments, metribuzin and KIH-485 provided ≥ 80% and 73% control of Asiatic dayflower respectively. Early POST applications of cloransulam-methyl and lactofen provided 80 and 67% control of Asiatic dayflower respectively.