Directed-spray application of paraquat and diuron in physic nut plants

Costa, Nivan B. da; Neunfeld, Tania Helena; Ohland, Tatiane; Piano, Jeferson Tiago; Klein, Jeferson

doi:10.1590/s0100-83582013000400025

Cited by 4 publications

(6 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Segundo Costa et al (2013), misturas do paraquat (200 e 600 g ha -1 ) com diuron (1.000 e 2.000 g ha -1 ) conferiram prejuízo ao desenvolvimento e à atividade fotossintética das plantas de pinhão-manso em aplicações com jato dirigido, enquanto que o paraquat aplicado isolado nas dosagens de 200 e 600 g ha -1 em jato dirigido apresentou bom potencial de seletividade para plantas de pinhão-manso. Ressalta-se que estes resultados divergem dos obtidos no presente trabalho.…”

Section: Resultsunclassified

“…Dentre os métodos de manejo das plantas daninhas utilizados em culturas perenes, o uso de herbicidas não seletivos aplicados em jato dirigido nas plantas daninhas pode ser uma excelente alternativa, considerando principalmente o manejo dessas espécies em extensas áreas de plantio (Costa et al, 2013). Porém, existem poucos estudos sobre o uso de herbicidas com distintos mecanismos de ação para o controle das plantas daninhas na cultura do pinhão-manso, por meio de tecnologias de aplicação em jato dirigido, as quais permitam viabilizar a seletividade de produtos de ação total disponíveis no mercado.…”

Section: Introductionunclassified

“…Em outro estudo, Costa et al (2013) constataram que o paraquat aplicado em jato dirigido apresentou bom potencial de seletividade para plantas de pinhão-manso.…”

Section: Introductionunclassified

See 2 more Smart Citations

Efeito de herbicidas aplicados em jato dirigido no desenvolvimento inicial de plantas de pinhão-manso

Costa¹,

Neunfeld²,

Ohland³

et al. 2014

RBHerbicidas

View full text Add to dashboard Cite

Resumo -Objetivou-se avaliar o efeito de glyphosate, paraquat e do amônio-glufosinato aplicados em plantas de pinhão-manso. Os tratamentos consistiram: glyphosate (180, 360, 720 e 1.440 g ha -1 ), paraquat (100, 200, 400 e 800 g ha -1) e amônio-glufosinato (125, 250, 500 e 1.000 g ha -1 ) e testemunha (sem aplicação). A aplicação dos herbicidas foi realizada aos 145 dias após a semeadura, em jato dirigido no terço médio inferior das plantas. As doses de glyphosate proporcionaram médias de fitointoxicação de 2,4% e não houve redução da área foliar, contudo, constatou-se redução média da massa seca de 9,0% aos 35 dias após a aplicação (DAA). Para o paraquat, até a dose de 200 g ha -1 ocorreram fitointoxicações inferiores a 20% até os 35 DAA, entretanto, houve redução da área foliar e da massa seca das plantas de 47,0 e 18,2%, respectivamente. A dose de 125 g ha -1 de amônio-glufosinato proporcionou menores valores de fitointoxicação (<20,0%), de redução da área foliar (2,7%) e da massa seca (10,5%) até 35 DAA. Concluiu-se que o contato do paraquat e do amônio-glufosinato com o caule e folhas pode prejudicar o desenvolvimento inicial das plantas. Entretanto, a aplicação do glyphosate não prejudicou o desenvolvimento inicial das plantas de pinhão-manso. Palavras-chaves: Jatropha curcas, seletividade a herbicidas, fitointoxicação Abstract -The objective was to evaluate the effect of glyphosate, paraquat and glufosinateammonium applied in jatropha plants. The treatments consisted: glyphosate (180, 360, 720 and 1,440 g ha -1 ), paraquat (100, 200, 400 and 800 g ha -1 ) and glufosinate-ammonium (125, 250, 500 and 1,000 g ha -1 ) and a control (no application). Herbicide application was performed at 145 days after sowing, with spraying directed to the lower third middle of the plants. The rates glyphosate provided average phytointoxication of 2.4% and no reduction in leaf area, however, there was an average reduction of 9.0% of dry weight at 35 days after application (DAA). Paraquat, for rates ≤ 200 g ha -1 , phytointoxication was lower than 20% to 35 DAA, however, there was a reduction in 1 Recebido para publicação em 15/01

show abstract

Section: Resultsunclassified

Section: Introductionunclassified

See 1 more Smart Citation

Efeito de herbicidas aplicados em jato dirigido no desenvolvimento inicial de plantas de pinhão-manso

Costa¹,

Neunfeld²,

Ohland³

et al. 2014

RBHerbicidas

View full text Add to dashboard Cite

show abstract

“…Paraquat is a non-selective, broad-spectrum, photosystem I electron diversion (group 22), which can be used in burndown applications (Zobiole et al, 2018;Kalsing et al 2020), in the pre-harvest desiccation of some crops (Bellaloui et al, 2020;Pereira et al, 2020), in interrow application (Costa et al, 2013) and in non-agriculture areas (e.g., under electric transmission lines, railways, and roadsides). However, it has been banned in several countries (Camargo et al, 2020;Kim, Kim, 2020;Tsai, 2020).…”

Section: Introductionmentioning

confidence: 99%

Agronomic implications of paraquat ban in Brazil

Albrecht¹,

Albrecht²,

Silva³

2022

Advances in Weed Science

View full text Add to dashboard Cite

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided that the original author and source are credited. Paraquat: mode of action and historical aspectsParaquat and diquat are bipyridylium herbicides with photosystem I electron diversion mode of action. They have contact action, limited translocation and rapid Abstract: Background: Paraquat is a broad spectrum herbicide used particularly in burndown, in pre-plant of row crops and in the pre-harvest desiccation of some crops. In Brazil, paraquat was re-evaluated by Anvisa, leading to a prohibition of production and sales on September 22, 2020, and used until July 31, 2021. Objective: The objective of this review is to characterize the use of paraquat in Brazil and describe the status in other countries, particularly the agronomic implications of its ban, possible replacements, and scenarios. Review: The use of paraquat is important for weed management in different production systems. Owing to its toxicity, its use has been reevaluated in several countries. For pre-harvest desiccation of soybeans, diquat, glufosinate, and some combinations with Protox inhibitors are highlighted as alternatives to paraquat. For pre-harvest desiccation of common beans, diquat, saflufenacil, and glufosinate could be used; however, only glufosinate could be used for wheat. For managing broadleaves weeds, glufosinate, saflufenacil, carfentrazone, and diquat are effective alternatives. Diquat may be less effective in controlling Conyza spp. resistant to paraquat. For grasses control, glufosinate, in addition to ACCase inhibitors and possible mixtures, may be helpful. Although pre-emergent herbicides are not classified as desiccant herbicides, they contribute to weed management. The adoption of herbicide-tolerant crops, mechanical control, and cover crops can be added as agricultural practices for integrated weed management. Conclusions: Due to the ban on paraquat, challenges arise, and the most often suggested replacements are glufosinate, diquat, and Protox inhibitors; however, grass control will be of greater concern.

show abstract

“…Moreover, the synergism between the action mechanisms of paraquat and of diuron (Costa et al, 2013) potentially promotes greater amount of stress causing agents, which, in the presence of 2,000 μM of SNP, can produce harmful levels of ONOO -, explaining the toxicity of the higher concentration of the protector in these conditions.…”

mentioning

confidence: 99%

Electrolyte Leakage and the Protective Effect of Nitric Oxide on Leaves of Flooded Rice Exposed to Herbicides

Silva¹,

Urban²,

Balbinot³

et al. 2016

Planta daninha

View full text Add to dashboard Cite

-The nitric oxide acts on the antioxidant system of plants and can discontinue the damage of herbicides elicitors of oxidative stress that cause the disruption of membranes and leakage of cellular contents. In order to evaluate the protective effect of nitric oxide in electrolytes leakage, leaf segments of the Puita INTA CL rice cultivar were incubated with 0, 5, 50, 500 and 5,000 μM clomazone (360 g a.i. L -1 ), oxadiazon (250 g a.i. L -1 ), oxyfluorfen (240 g a.i. L -1 ) and the formulated mixture of paraquat (200 g a.i. L -1 ) + diuron (100 g a.i. L -1 ) to obtain the maximum potential conductivity of 50% (MPC 50 ). Subsequently, leaf segments were pre-treated with 0, 200 and 2,000 μM of sodium nitroprusside (SNP) for four hours and further incubated for 48 hours with 0, 0.5, 1, 2 and 4 times the concentration of the herbicide that caused the CMP 50 , and the protective effect was reassessed in the presence of nitric oxide scavenger, cPTIO. The MPC 50 was caused by exposure to 188.9, 273.4, 410.2 + 205.1 and 917.0 μM of Oxadiazon, Oxyfluorfen, Paraquat + Diuron and Clomazone. Pretreatment with 200 μM of SNP reduced electrolyte leakage in leaf segments exposed to 2 and 4 times the MPC 50 to oxadiazon and paraquat + diuron, while 2,000 μM reduced the damage caused by oxyfluorfen, at the same concentrations. Also, 200 and 2,000 μM of SNP were efficient for clomazone, and the protection was confirmed by cPTIO in all cases.Keywords: Oryza sativa, sodium nitroprusside, clomazone, oxadiazon, oxyfluorfen, paraquat + diuron. 188,9; 273,4; 410,2 + 205,1; e 917,0 RESUMO -O óxido nítrico atua no sistema antioxidante das plantas e pode conter o dano de herbicidas

show abstract

Directed-spray application of paraquat and diuron in physic nut plants

Cited by 4 publications

References 10 publications

Efeito de herbicidas aplicados em jato dirigido no desenvolvimento inicial de plantas de pinhão-manso

Efeito de herbicidas aplicados em jato dirigido no desenvolvimento inicial de plantas de pinhão-manso

Agronomic implications of paraquat ban in Brazil

Electrolyte Leakage and the Protective Effect of Nitric Oxide on Leaves of Flooded Rice Exposed to Herbicides

Contact Info

Product

Resources

About