Manejo de plantas daninhas no sistema de mudas pré-brotadas de cana-de-açúcar

Silva, Gustavo Soares; Silva, André Felipe Moreira; Giraldeli, Ana Lígia; Ghirardello, Giovani Apolari; Filho, Ricardo Victória; Toledo, Roberto

doi:10.7824/rbh.v17i1.526

Cited by 5 publications

(2 citation statements)

References 12 publications

(21 reference statements)

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“…The selectivity of herbicides may be different in the PSS system than that observed in the conventional system, the PSSs already have a root system, and when placed in contact with the soil the root system is in the region treated with the herbicide, which is the main route of absorption of herbicides applied at PRE, and there may be an absence of selectivity by positioning. Possibly higher rates of absorption and translocation of herbicides (Dias et al 2017;Silva et al 2018).…”

Section: Discussionmentioning

confidence: 99%

“…However, further studies are needed to understand the chemical management of C. rotundus in PSS. It is noteworthy that in areas where PSSs are planted for the purpose of multiplication for commercial areas there is no straw, which favors weeds of smaller and photoblastic positive seeds, such as Poaceae family species, which hinders the management with herbicides of broad spectrum (Silva et al 2018). Thus, if chemical management may differ in the PSS system, this study aimed to evaluate the efficacy of herbicides for the control of C. rotundus and other weeds in pre-sprouted sugarcane seedlings.…”

Section: Chemical Management Of Cyperus Rotundus L and Other Weeds At Sugarcane In Pss Systemmentioning

confidence: 99%

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Chemical management of Cyperus rotundus L. and other weeds at sugarcane in PSS system

et al. 2021

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Among the main weeds with difficult to control in the sugarcane fields can be cited purple nutsedge (Cyperus rotundus L.). This specie was observed in the seed bank in sugarcane fields harvested with or without burning. The objective of this study was to evaluate the efficacy of herbicides in pre-sprouted seedlings (PSS) of sugarcane in the control of C. rotundus and other weeds. The work was carried out in the field, in a randomized complete block design, and four replications. The treatments corresponded to the herbicides applied in pre-planting: sulfentrazone (800 g a.i. ha-1), diclosulam (193.17 g a.i. ha-1), imazapic (133 g a.i. ha-1) and imazapyr (500 g a.e. ha-1); post-planting: halosulfuron (112.5 g a.i. ha-1), ethoxysulfuron (135 g a.i. ha-1), MSMA (1,975 g a.i. ha-1) and 2,4-D (1,340 g a.e. ha-1); besides a control treatment weeding and another without weeding. The symptoms of injury on sugarcane plants, percentage of weed control, variables related to agronomic performance of sugarcane, and yield were evaluated. The herbicides diclosulam, imazapic, and imazapyr caused serious damage to the crop. The halosulfuron, ethoxysulfuron, MSMA, and 2,4-D did not cause symptoms of injury to sugarcane, however, the treatments had a reduced yield due to the low weed control. The sulfentrazone treatment obtained the second highest yield but with effective weed control (>70%) up to 45 days after planting. The best controls were obtained with pre-planting treatments; however, herbicide positioning studies should be performed in relation to PSS.

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Section: Discussionmentioning

confidence: 99%

Section: Chemical Management Of Cyperus Rotundus L and Other Weeds At Sugarcane In Pss Systemmentioning

confidence: 99%

Chemical management of Cyperus rotundus L. and other weeds at sugarcane in PSS system

et al. 2021

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Weed interference periods in pre-sprouted sugarcane seedlings

Giraldeli

Silva²,

Pagenotto

et al. 2022

International Journal of Pest Management

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Initial interference of Cyperus rotundus L. in pre-sprouted seedlings of sugarcane cultivars RB985476 and IACSP95-5000

et al. 2018

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Weeds compete with plants for water, light, nutrients and space. In sugarcane, planting pre-sprouted sugarcane seedlings (PSS) may mean a change in weed interference and management. The aim of this study was to generate information on the interference of Cyperus rotundus L. in PSS. Two experiments were carried out in a completely randomized design, one with cultivar RB985476, with seven densities of C. rotundus (0, 17, 35, 70, 140, 280 and 560 plants m-2), and the second with cultivar IACSP95-5000, with four densities of C. rotundus (0, 70, 140 and 280 plants m-2). For this weed, a 2x6 factorial design was used for the experiment with RB985476 and a 2x3 design was used for IACSP95-5000, the first factor being absence and presence of the crop, and the second factor the densities of the species. Biometric evaluations of height, diameter, number of tillers and leaves, leaf area and dry mass were carried out. The PSS had a reduction in height, number of leaves and leaf area in the main till at 60 d after planting (DAP) in RB985476. For the IACSP95-5000 cultivar, there was no reduction in the analyzed variables. The average dry mass per plant of C. rotundus decreased as the density of the species increased in the absence of PSS.

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Manejo de plantas daninhas no sistema de mudas pré-brotadas de cana-de-açúcar

Cited by 5 publications

References 12 publications

Chemical management of Cyperus rotundus L. and other weeds at sugarcane in PSS system

Chemical management of Cyperus rotundus L. and other weeds at sugarcane in PSS system

Weed interference periods in pre-sprouted sugarcane seedlings

Initial interference of Cyperus rotundus L. in pre-sprouted seedlings of sugarcane cultivars RB985476 and IACSP95-5000

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