Sensibilidade de cultivares de mandioca ao herbicida mesotrione

Silveira, Hellen Martins da; Silva, Daniel Valadão; Santos, José Barbosa dos; Neto, Manoel Delintro Castro; Ferreira, Evander Alves; Carvalho, Frédéric A.; Silva, Antônio Alberto da

doi:10.7824/rbh.v11i1.128

Cited by 19 publications

(21 citation statements)

References 4 publications

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“…Thus, chemical control appears to be an excellent alternative for the control of weeds in cassava cultures for allowing intervention in large areas with little dependence on manpower and due to its quick application (Silva et al, 2012;Silveira et al, 2012). However, in Brazil only ametryna+clomazone, clethodim, clomazone, isoxaflutole and metribuzin are registered herbicides for cassava cultures (Rodrigues & Almeida, 2005).…”

Section: Introductionmentioning

confidence: 99%

Selectivity of clomazone and S-metolachlor applied after cassava pruning

et al. 2013

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-The objective of this work was to evaluate the selectivity of clomazone in two formulations and S-metolachlor applied on shoots of different sizes after pruning of 'Baianinha' cassava. The experiment was arranged in a randomized block design in a factorial 5 x 2 (5 treatments x 2 sizes of shoots after pruning -10 and 33 cm) with four replications. The herbicides evaluated were: clomazone (encapsulated suspension -900 g h -1 ), clomazone (encapsulated suspension -1,080 g ha -1 ), clomazone (emulsifiable concentrate 900 g ha -1 ), S-metolachlor (1,920 g ha -1 ) and an untreated control. During the experiment, all plots were kept free of weed interference by hand weeding. It was concluded that both the formulations of clomazone and S-metolachlor were selective when applied on both the shoot sizes evaluated. However, the application of S-metolachlor on 33 cm shoots gave higher selectivity to 'Baianinha' cassava plants. Keywords:Manihot esculenta, microencapsulated, weed, clomazone, S-metolachlor. RESUMO -Objetivou-se neste estudo avaliar a seletividade do clomazone em duas formulações e do S-metolachlor aplicados em diferentes tamanhos de brotos depois da poda da mandioca Baianinha. O delineamento experimental utilizado foi o de blocos ao acaso, em esquema fatorial 5 x 2 (5 tratamentos x 2 tamanhos de brotos após a poda -10 e 33 cm), com quatro repetições. Os herbicidas

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Section: Introductionmentioning

confidence: 99%

Selectivity of clomazone and S-metolachlor applied after cassava pruning

et al. 2013

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“…Entretanto, devido a escassez da mão de obra destinada às capinas manuais, dos danos as raízes da cultura causados pelos cultivadores, além do baixo rendimento no controle, estes métodos estão sendo pouco utilizados em áreas de lavouras comerciais, além de que, podem apresentar custo 22 a 64% superior em relação ao controle químico ou ao manejo integrado (Chikoye et al, 2006;Silva & Chabaribery, 2006). Desta maneira, o controle químico apresenta-se como excelente alternativa para o manejo das plantas daninhas na cultura da mandioca por permitir a intervenção em grandes áreas com pouca dependência de mão de obra e rapidez na aplicação (Silva et al, 2012;Silveira et al, 2012).…”

Section: Introductionunclassified

“…No entanto, Silva et al (2012) relataram que existem diversas moléculas de herbicidas que possibilitaram resultados de pesquisa satisfatórios no controle das plantas daninhas, sendo seletivos para a mandioca, porém ainda estão sem registro. Entre esses produtos destacam-se o fluazifop-p-butil e o mesotrione que apresentaram seletividade a mandioca, e que podem ser incluídos em programas de manejo de plantas daninhas (Oliveira Jr. et al, 2001;Chikoye et al, 2006;Silva et al, 2011;Silveira et al, 2012).…”

Section: Introductionunclassified

Seletividade de herbicidas aplicados com óleo mineral na cultura da mandioca ‘Cascuda’

Costa¹,

Pavan²,

Dourado³

et al. 2013

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Resumo -O uso de adjuvante pode influenciar na seletividade dos herbicidas as culturas agrícolas. Objetivou-se avaliar a seletividade de herbicidas aplicados com diferentes concentrações de adjuvante óleo mineral na cultura da mandioca 'Cascuda'. O delineamento experimental utilizado foi o de blocos ao acaso, com quatro repetições. Foi utilizado o esquema fatorial 3x3+1 que consistiu de três herbicidas clethodim (120 g ha -1 ); fluazifop-p-butyl (250 g ha -1 ) e mesotrione (240 g ha -1 ), três concentrações de óleo mineral (Assist ® ) 0,0; 0,5 e 1,0% v v -1 ; além de uma testemunha sem aplicação. Todas as parcelas foram mantidas livres da interferência das plantas daninhas por meio de capinas manuais. Apenas, o mesotrione promoveu sintomas de fitointoxicação leves a moderados (5,5 a 51,3%) quando aplicado com óleo mineral. Contudo, todos os herbicidas apresentaram-se seletivos à mandioca 'Cascuda' na dose aplicada, tanto na presença quanto ausência de óleo mineral até 1% v v -1 . Palavras-chaves: Manihot esculenta, plantas daninhas, controle químico, adjuvanteAbstract -The use of adjuvant can influence the selectivity of herbicides on crops. Aimed to evaluate the selectivity of herbicides with different concentrations of mineral oil adjuvant in cassava 'Cascuda'. The experimental design was a randomized block design with four replications. We used a factorial design 3x3+1 which consisted of three herbicides clethodim (120 g ha -1 ), fluazifop-p-butyl (250 g ha -1 ) and mesotrione (240 g ha -1 ), three concentrations of mineral oil (Assist ® ) 0.0, 0.5 and 1.0% v v -1 , and a control without application. All plots were kept free of weed interference by hand weeding. Only the mesotrione promoted phytointoxication mild to moderate (5.5 to 51.3%) when applied with mineral oil. However, all herbicides were selective for cassava plants 'Cascuda' in applied both in the presence and absence of mineral oil to 1% v v -1 .

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“…However, cassava response to herbicides application may vary from total selectivity for some products until full production jeopardy because of crop poisoning (Silveira et al, 2012;Costa et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Sulfentrazone Selectivity and Efficiency in Cassava Crops in Sandy and Clayey Soils

et al. 2015

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Recebido para publicação em 16.7.2015 ABSTRACT -Weeds have the potential to dramatically interfere in cassava cultivation, reducing its productive potential; however, there are few studies on the selective herbicides in this crop. Therefore, the objective was to evaluate in this work the selectivity and efficiency of sulfentrazone in cassava crops grown in sandy and clayey soils. Two experiments were carried out: The first one was carried out in sandy soil conditions in the conventional system; and the second one was carried out in clayey soil conditions in the no-tillage system. The experimental design was a randomized block with four replications. The treatments consisted in doses of 250, 500, 750 and 1,000 g ha -1 of sulfentrazone, and weeded and non-weeded controls. Sulfentrazone application in cassava crops has linearly reduced the production of roots in a proportion of 0.0153 and 0.0107 t ha -1 at each increment in grams of the active ingredient, respectively. It was concluded that sulfentrazone was not selective for cassava crops grown both in sandy and in clayey soil; however, it was highly effective in weed control in both soils.

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Sensibilidade de cultivares de mandioca ao herbicida mesotrione

Cited by 19 publications

References 4 publications

Selectivity of clomazone and S-metolachlor applied after cassava pruning

Selectivity of clomazone and S-metolachlor applied after cassava pruning

Seletividade de herbicidas aplicados com óleo mineral na cultura da mandioca ‘Cascuda’

Sulfentrazone Selectivity and Efficiency in Cassava Crops in Sandy and Clayey Soils

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