Atividade residual de herbicidas aplicados em pós-emergência na cultura da soja sobre o milheto cultivado em sucessão

Dan, Hugo Almeida; Barroso, Alberto Leão de Lemos; Dan, L.G.M.; Procópio, S.O.; Oliveira, Rubem Silvério de; Simon, Gustavo André; Munhoz, D.M

doi:10.1590/s0100-83582011000300021

Cited by 20 publications

(30 citation statements)

References 15 publications

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“…As for the dose effect on the persistence of imazethapyr, the application of 60 g ha was not sufficient to promote negative effects on the accumulation of DM of maize cultivated in succession with soybeans. However, the 100 g ha -1 dose promoted a significant residual effect on maize (Dan et al, 2012). However, imidazolinones exhibit an amphoteric chemical nature, with two ionizable functional groups: a carboxylic group (acid) and an amino (basic); imazethapyr had an electrolytic dissociation capacity (pKA) of 3.9 in the carboxylic and 2.1 in the amino (Senseman, 2007).…”

Section: Haplic Gleysol (Gx)mentioning

confidence: 99%

Persistence of Imidazolinones in Soils Under a Clearfield System of Rice Cultivation

et al. 2016

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-The commercial mixture of imazethapyr and imazapic herbicides has been used for the control of red rice and several other species of weeds found in rice crops; this system called Clearfield. However, its use may limit the succession of non-tolerant crops for long residual activity. The research objective with this work was to determine the persistence of imazethapyr, imazapic and their mixture in three soils in the Brazilian state of Tocantins. Three experiments were conducted in a completely randomized design with four replications, each corresponding to the evaluated soil (Haplic Plinthosol (FX), red-yellow Latosol (LVA) and Haplic Gleysol (GX)). The treatments were arranged in a split plot design, with the allocated plots herbicides (imazethapyr and imazapic alone and commercial mixture) and the plots allocated the 11 evaluation times (1, 15, 30, 45, 60, 75, 90, 105, 120, 135, 150 days after treatment (DAT)), and a control without application. Contacted up long residual effect of imazethapyr and commercial mixture of imazethapyr and imazapic, regardless of assessed soil. After 150 days of applying herbicides or the commercial mixture, their residues in the soil also inhibited approximately 94% of the mass of the dry matter accumulation of the indicator plants. When imazapic was applied alone, there was a higher dry matter accumulation of the indicator plants, indicating less residual effect of this herbicide in the soil and this was attributed to the lower dose of this herbicide applied. The attributes of the soil pH, texture and iron oxides were what most affected the persistence of the herbicides. It can be concluded that the persistence of imazethapyr and imazapic is too long in the Brazilian state of Tocantins soils and the use of these herbicides in the region should be avoided due to the high risk of the occurrence of carryover,or be well planned, as land use in rotation for susceptible crops. (1, 15, 30, 45, 60, 75, 90, 105, 120, 135 Keywords

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Section: Haplic Gleysol (Gx)mentioning

confidence: 99%

Persistence of Imidazolinones in Soils Under a Clearfield System of Rice Cultivation

et al. 2016

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“…However, these researchers did not find any effect on corn when it was planted after 60 DAA. Dan et al (2012) have found little residual effect of imazethapyr in maize plants at 97 DAA.…”

Section: Resultsmentioning

confidence: 86%

“…In general, researches (Artuzi & Contiero, 2006;Dan et al, 2012;Souto et al, 2013) show an absence of imazethapyr residual effects from 90 DAA. Based on these results, maize cultivation in the off-season after application Table 7 -Control of maize in desiccation under cover crops and herbicides in desiccation management.…”

Section: Resultsmentioning

confidence: 92%

Volunteer RR® corn management in roundup ready® soybean-corn succession system

et al. 2015

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-The present study evaluated the effects of cover crops (Pennisetum glaucum, Crotalaria spectabilis and Urochloa ruziziensis) associated with the application of herbicides {glyphosate; (glyphosate + haloxyfop-R); (glyphosate + fluazifop-p-butyl); (glyphosate + imazethapyr) and (glyphosate + imazaquin)} in soybean desiccation management for volunteer RR® corn control. The experiment was conducted under field conditions at Sinop-MT, during the 2013/2014 crop season, in a randomized complete blocks design with factorial scheme and four replications. The following parameter were evaluated: dry matter of cover crops and ground coverage rate, control of volunteer RR ® corn present at the time of desiccation, dry matter, height and intoxication level on soybean plants caused by herbicides at 7, 14 and 28 days after emergence (DAE), control of volunteer RR ® corn derived from emergence fluxes subsequent to desiccation management and soybean yield. The joint application of (glyphosate + haloxyfop-R) provided the best level of volunteer RR ® corn control present at the time of desiccation. Satisfactory control (80%) of volunteer corn was obtained with the application of (glyphosate + imazethapyr). This treatment displayed an additional residual effect of imazethapyr, which efficiently controled volunteer RR ® corn derived from fluxes subsequent to desiccation management, especially in treatments performed under U. ruziziensis straw. None of the herbicides used in desiccation management caused any significant effect on dry matter, height and phytotoxicity of soybean plants at 7, 14 and 28 DAE nor on grain yield.

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“…In conclusion, the authors recommended a 60-day interval between herbicide application and corn seeding in order to ensure maximum crop yield. Dan et al (2012), also working in clay soil, seeded corn 97 days after application of chlorimuron (15 g ha -1…”

Section: Resultsmentioning

confidence: 99%

“…Currently, early and very early soybean cultivars are often used, together with early harvesting techniques. As a result, the time interval between soybean harvest and seeding of succeeding crops is reduced, increasing the risk of any adverse effects caused by the residual activity of herbicides applied in soybean over succeeding agricultural crops seeded in the same area (Dan et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Soil Persistence of Chlorimuron-Ethyl and Metsulfuron-Methyl and Phytotoxicity to Corn Seeded as a Succeeding Crop

et al. 2015

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Two experiments were carried out to evaluate soil persistence of chlorimuron-ethyl and metsulfuron-methyl and phytotoxicity to corn seeded as a succeeding crop. One experiment was conducted with chlorimuron-ethyl applied at 20 g ha-1, and one with metsulfuron-methyl applied at 3.96 g ha-1. Treatments were arranged in a factorial design with two types of soil (sandy and clay), three irrigation regimes (daily, weekly and no irrigation) and four application timings (90, 60 and 30 days before corn seeding, as well as untreated plots). Soil persistence of the herbicides was influenced by water availability, molecule water solubility (leaching potential) and application timings prior to corn seeding. In sandy soil, with adequate water availability, leaching probably had the greatest influence, reducing the persistence of the products, and consequently allowing less time between product application and corn seeding. In clay soil, microbial degradation was probably more important, because it was assumed that the lesser time available for microorganism activity, the lesser the damage was observed for corn, as long as the crop had enough water availability. Metsulfuron-methyl was the least phytotoxic herbicide, possibly as a result of the properties of its molecule and its higher leaching potential.

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Atividade residual de herbicidas aplicados em pós-emergência na cultura da soja sobre o milheto cultivado em sucessão

Cited by 20 publications

References 15 publications

Persistence of Imidazolinones in Soils Under a Clearfield System of Rice Cultivation

Persistence of Imidazolinones in Soils Under a Clearfield System of Rice Cultivation

Volunteer RR® corn management in roundup ready® soybean-corn succession system

Soil Persistence of Chlorimuron-Ethyl and Metsulfuron-Methyl and Phytotoxicity to Corn Seeded as a Succeeding Crop

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