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Yield of Dicamba-Tolerant Soybean as Influenced by Micro-Rates of 2,4-D
dc.creator | Knežević, Stevan | |
dc.creator | Scott, Jon | |
dc.creator | Jovanović, Darko | |
dc.creator | Cuvaca, Ivan | |
dc.date.accessioned | 2024-02-22T11:16:50Z | |
dc.date.available | 2024-02-22T11:16:50Z | |
dc.date.issued | 2019 | |
dc.identifier.isbn | 9781713803362 | |
dc.identifier.uri | http://RIVeC.institut-palanka.rs/handle/123456789/828 | |
dc.description.abstract | Like other auxin herbicides, 2,4-D is typically associated with increased risk for drift-related damage to non-target crops. A study was conducted in 2019 near Concord, NE to investigate the impact of 2,4-D micro-rates on dicamba-tolerant (DT) soybean yield. The experiment used a randomized complete block design (RCBD) with four replications and a split-plot arrangement. Main plots consisted of three 2,4-D application times [second trifoliate (V2); beginning of flowering (V7/R1); and full flowering (R2)] and subplots consisted of six micro rates of 2,4-D (1/5; 1/10; 1/50; 1/100; 1/500; and 1/1000 of the label recommended dose of 1,120 g ae ha-1) and a check with no herbicide applied. Crop injury was visually assessed at 7, 14 and 21 days after treatment (DAT). Grain yield was also collected. Increase in 2,4-D dose increased soybean injury and reduced yield. Less than 1/10 of the label recommended dose of 2,4-D caused 5-20% injury regardless of application time. V2 and R2 were 1.9- and 2.6-fold, respectively, more sensitive to 2,4-D injury than the R1 stage at 21 DAT. The effective dose of 2,4-D required to cause 5% soybean injury at 21 DAT at V2, R1 and R2 was 49.27, 94.26 and 36.59 g ae ha-1, respectively. In regards to yield reduction, the V2 and R1 stages were 4.2- and 3.5-fold, respectively, more sensitive to 2,4-D than the R2 stage. Preliminary data analysis showed that dose of 2,4-D of 7.17-8.72 g ae ha-1 reduced soybean yield by 5% (0.2 Mg ha-1) at the V2 and R1 stages. These results show that off-target movement of 2,4-D can significantly reduce soybean yield and therefore should be avoided. | sr |
dc.language.iso | en | sr |
dc.publisher | North Central Weed Science Society (NCWSS) | sr |
dc.rights | openAccess | sr |
dc.source | Proceedings of the 74th Annual Meeting of the North Central Weed Science Society, December 10-13, 2019 Columbus, OH | sr |
dc.subject | 2,4-D | sr |
dc.subject | drift-related damage | sr |
dc.subject | Concord NE | sr |
dc.title | Yield of Dicamba-Tolerant Soybean as Influenced by Micro-Rates of 2,4-D | sr |
dc.type | conferenceObject | sr |
dc.rights.license | ARR | sr |
dc.citation.spage | 25 | |
dc.identifier.fulltext | http://RIVeC.institut-palanka.rs/bitstream/id/2655/DJ02.pdf | |
dc.identifier.rcub | https://hdl.handle.net/21.15107/rcub_rivec_828 | |
dc.type.version | publishedVersion | sr |