Controle de tiririca com sulfentrazone e diclosulam e viabilidade de tubérculos em diferentes profundidades de solo

Martins, D.; Tomazela, Mario Sergio; David, Domingos Vanessa; Martins, Cibele Chalita

doi:10.1590/s0006-87052009000200009

Cited by 4 publications

(4 citation statements)

References 13 publications

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“…For C. rotundus, the use of diclosulam (200 g a.i. ha -1 ) reached control scores of 91.5% (45 DAA), 96.5% (60 DAA) and 93.5% (90 DAA), reducing the number of germinated, dormant and dead tubers in relation to control (without application) (Martins et al 2009). In the present study, diclosulam provided a reduction in the emergence of C. rotundus, P. maximum and D. ciliaris species reaching overall control of 82.67% (15 DAP), 92.5% (30 DAP), 80% (45 DAP ), reducing from 60 DAP, mainly due to the presence of species such as A. tenella and P. oleraceae.…”

Section: Discussionmentioning

confidence: 89%

“…For sulfentrazone, 37.5% (30 DAP) and 20% (45 DAP) injury symptoms were observed, characterized as red spots on the leaves, which were no longer seen from 60 DAP. Martins et al (2009) found red elliptic stains on the leaf. The injury was also found by Sabbag et al (2017) at PSS of RB867515, RB855156, RB966928, and RB975201, for sulfentrazone (700 g a.i.…”

Section: Discussionmentioning

confidence: 96%

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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: 89%

Section: Discussionmentioning

confidence: 96%

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

et al. 2021

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“…However, even with a good shoot control, the highest reduction in tuber viability was obtained in the treatments with sulfentrazone, imazapic, halosulfuron, ethoxysulfuron, and MSMA, all with scores of 3 (31 to 60% of staining in the bud and central regions). MARTINS et al (2009) observed that the control of C. rotundus was over 90% when the herbicides sulfentrazone (800 and 1,000 g ai•ha −1 ) and diclosulam (200 and 250 g ai•ha −1 ) were used in preemergence. Both herbicides reduced the number of germinated tubers (0 to 10 cm deep) for all tested rates at 110 DAA.…”

Section: Discussionmentioning

confidence: 99%

Viability of Cyperus rotundus L. tubers after application of herbicide in pre- and postemergence

Giraldeli

Silva²,

Brito

et al. 2020

Arq. Inst. Biol.

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Chemical management is the most widely adopted technique to control weeds in sugarcane crops. Purple nutsedge (Cyperus rotundus L.) is among the most difficult species to control. Herbicides need to be absorbed and translocated in a sufficient amount for the tuber chain to be effective. Thus, this study aimed to evaluate the effectiveness of the herbicides sulfentrazone, diclosulam, imazapic, imazapyr, halosulfuron, ethoxysulfuron, monosodium methyl arsenate (MSMA), and 2,4-dichlorophenoxyacetic acid (2,4-D) in controlling C. rotundus and reducing the viability of its tubers. The experiment was carried out in a greenhouse in a completely randomized design, with nine treatments and four replications. The herbicides sulfentrazone (800 g active ingredient – ai·ha?1), diclosulam (193.17 g ai·ha?1), imazapic (133 g ai·ha?1), and imazapyr (500 g acid equivalent – ae·ha?1) were applied in preemergence at five days after planting the tubers, while halosulfuron (112.5 g ai·ha?1), ethoxysulfuron (135 g ai·ha?1), MSMA (1,975 g ai·ha?1), and 2,4-D (1,340 g ae·ha?1) were applied in postemergence (4 to 5 leaves). The parameters visual control, shoot dry matter, number of tubers and bulbs, weight of tubers + bulbs, number of epigeal manifestations, and tuber viability were analyzed. The herbicides diclosulam, halosulfuron, and ethoxysulfuron provided 100% control of the shoot at 90 days after application (DAA). All herbicides reduced the number of bulbs, weight of tubers + bulbs, and shoot dry matter. The herbicides sulfentrazone, imazapic, halosulfuron, ethoxysulfuron, and MSMA provided the highest reduction in tuber viability.

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“…DAP, mas que não evoluíram para sintomas mais severos. Os dados obtidos neste estudo corroboram com os autores, visto que os tratamentos contendo aplicação de sulfentrazona, ou de flumioxazina, apesar da fitotoxicidade inicial, não causaram problemas ao desenvolvimento das plantas de cana-de-Cyperus rotundus(MARTINS et al, 2009). Portanto, o uso deste herbicida é de grande importância para o manejo eficiente de plantas daninhas em cana-de-açúcar.…”

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Eficácia e seletividade de associações de herbicidas inibidores da PPO e do fotossistema II aplicados em pós-transplante de mudas pré-brotadas de cana-de-açúcar

Malardo¹

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Efficacy and selectivity of associations of PPO and photosystem II inhibitor herbicides applied in post-transplant of pre-sprouted sugarcane seedlingsWeeds compete directly and indirectly with the sugarcane crop, harming production. In this way, controlling these weeds is of great importance to achieve high productivity. The chemical management of weeds is one of the most efficient methods, however, depending on how the herbicides are applied, they can cause damage to the crop. Therefore, knowing the phytotoxic effect that the application of herbicides can cause in pre-sprouted seedlings is necessary. Thus, the objective of this work was to evaluate the effectiveness and selectivity of associations of protox and photosynthema II inhibitor herbicides in post-transplant of pre-sprouted sugarcane seedlings, when compared with other associations of herbicides practiced by sugarcane producers. Two projects were carried out, the first one in a greenhouse, following a completely randomized design, with four replications and a 10 x 2 factorial scheme, where the first factor corresponded to the treatments (control; (sulfentrazone + diuron) (525.0 + 1050.0); (sulfentrazone + diuron) (700.0 + 1400.0); (sulfentrazone + diuron) (875.0 + 1750.0); (sulfentrazone + diuron) + mesotrione (700.0 + 1400.0 + 120.0); diclosulan + tebuthiuron + ametryn (70.6 + 750.0 + 1500.0); diclosulan + s-metolachlor + ametryn (70.6 + 2400.0 + 1500.0); 2.4-D (1005.0) for dicots and metribuzin (1920.0) for monocots; MSMA + ametryn (1185.0 + 1500.0) and flumioxazin + tebuthiuron (125.0 + 750.0), doses in g a.i. ha -1 ) and the second at two application times (post-initial (2 to 4 leaves/1 to 2 tillers) and late post (6 to 8 leaves/3 to 4 tillers)). This scheme was carried out in 11 independent experiments, one for each weed studied (Luffa aegyptiaca; Ipomoea hederifolia; Merremia aegyptia; Ricinus communis; Momordica charantia; Mucuna aterrima; Digitaria nuda; Rottboellia exaltata; Brachiaria plantaginea; Brachiaria decumbens and Panicum maximum) . The sampling units were composed of 3.0 L pots filled with sandy-clay soil and the weeds were sown according to the company's recommendation. After sowing the weeds, the pots were kept in a greenhouse with irrigation. When the weeds reached the necessary phenological stages, application was carried out with a costal sprayer pressurized with CO2. Control assessments were performed at 7; 14; 21; 28; 35 and 42 days after application (DAA), following the visual rating scale proposed by ALAM (1974). At 42 DAA, shoot dry mass was evaluated, cutting the remaining plants close to the ground, placing them in paper bags and taking them to an air circulation oven until they reached constant weight. The data obtained were analyzed by the F Test at 5.0% and, when significant, by the Scott-Knott Test also at 5.0%. The second project was conducted in the field, in two seasons (2018/2019 and 2019/2020), following a randomized block design, with 4 replications and 14 treatments (control without weeding; control weeded; (sul...

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Controle de tiririca com sulfentrazone e diclosulam e viabilidade de tubérculos em diferentes profundidades de solo

Cited by 4 publications

References 13 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

Viability of Cyperus rotundus L. tubers after application of herbicide in pre- and postemergence

Eficácia e seletividade de associações de herbicidas inibidores da PPO e do fotossistema II aplicados em pós-transplante de mudas pré-brotadas de cana-de-açúcar

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