000			02696nab a2200253 i 4500
003			BR-BrBNA
005			20230925110204.0
008			230814b2020 bl.ar|pooa||| 00| 0 eng |
040			_aBR-BrBNA _beng
072			_aH60 _b0336
100			_aRizzardi, M.A.
100			_aRockenbach, A.P.
100			_aSchneider, T.
245			_aResidual herbicides increase the period prior to interference in soybean cultivars
500			_aPublicação on-line; 19 ref.; 5 illus.; Summary (En)
520			_a ABSTRACT Background: The pre-emergence herbicides diclosulam and flumioxazin are used to weed control in soybean. We hypothesized management of the new emergence of weeds in the early development stages of the soybean could alter the periods of interference. Thus, the period prior to interference allows and increases the canopy closure spaces before the critical period and disfavors the development of weeds inside the vegetative canopy. Objective: This study aimed to evaluate whether the period prior to interference of soybean cultivars was altered due to the application of residual pre-emergence herbicides. Methods: Two experiments were conducted with the soybean cultivars ‘NA 5909 RG’ and ‘P95R51’. One day before sowing in the main plots, the herbicide treatments paraquat (control without residual herbicide), paraquat+diclosulam, and paraquat+flumioxazin were applied. In the sub-plots, the increasing periods of coexistence of soybean with weeds of 0, 7, 14, 21, 28, 35, 42, and 49 days after the emergence of soybean were allocated. Results: The control without residual herbicide had the lowest period prior to interference and the most considerable reductions in grain yield when compared with residual herbicides in both experiments. The presence of residual herbicide increased the period prior to interference because they controlled the initial emergence of the major weeds in the experimental area. Conclusions: The use of the herbicides with residual activity diclosulam and flumioxazin increased the period prior to interference of ‘NA 5909 RG’ and ‘P95R51’ in areas infested mainly with horseweed and radish. Keywords: interference periods pre-emergence competition weeds
650			_aERVA DANINHA
650			_aSOJA
650			_aPRÉ-EMERGÊNCIA
773	0		_0886 _91817 _dLondrina-PR : Sociedade Brasileira da Ciência das Plantas Daninhas, 1978 _o2023-031024 _tPlanta Daninha (Brazil) _x0100-8358; 1806-9681 (on-line) _gv. 38 p. 1-7; (2020) _wBR2023000858
856			_uhttps://www.scielo.br/j/pd/a/73tZ5fLjFLvjXwKkxQd9Q6J/?format=pdf&lang=en
942			_cAnalítica
999			_c9805 _d9805