Tolerância de diferentes cultivares de cana-de-açúcar (Saccharum spp.) A herbicidas

Zera, Fabricio Simone; Azania, Carlos Alberto Mathias; Schiavetto, Ana Regina; Lorenzato, Cassia Morilha; Azania, A.A.P.M.

doi:10.1590/s0100-83582011000300013

Cited by 8 publications

(5 citation statements)

References 16 publications

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“…The differential tolerance to herbicides among cultivars has been the subject of study for several crop species (Barros et al, 2005, Fontana et al, 2007Souza et al, 2009;Zera et al, 2011;Silva et al 2011). It is known the differential selectivity of sulfentrazone to soybean cultivars (Swantek, Sneller;Oliver, 1998;Barros et al, 2005).…”

Section: Resultsmentioning

confidence: 99%

Tolerance of dry bean cultivars to saflufenacil

et al. 2014

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The herbicide saflufenacil is a Protox inhibitor, with differential translocation mode in comparison to other herbicides with the same mechanism of action. Selectivity, efficacy and safety to the environment are important characteristics for practical application of a herbicide in agriculture. The aim of this study was to determine the tolerance of ten dry bean cultivars to saflufenacil, applied on preemergence. The experiment was conducted in split plot randomized blocks design with ten dry bean cultivars (IAPAR 81; IPR Tiziu, IPR Corujinha; BRS Estilo; BRS Talismã; BRS Esplendor; BRS Campeiro; BRS Radiante, BRS Vereda and Jalo Precoce) allocated in plots and saflufenacil concentrations (0, 14.7 and 29.4 g ha -1 ) in subplots. Evaluations were performed at 21 and 28 days after application (DAA) and plant height at 28 and 35 DAA. At physiological maturity were evaluated plant height, first pod height , number of pods per plant, 400 grains weight and dry beans grain yield. The cultivar Talismã showed low sensitivity to the herbicide and the cultivar Jalo Precoce high sensitivity to the herbicide, considering all variables analyzed.Index terms: Selectivity, Protox inhibitor, Phaseolus vulgaris. RESUMOO herbicida saflufenacil é inibidor da Protox, com modo de translocação diferenciado em relação a outros herbicidas pertencentes ao mesmo mecanismo de ação. Seletividade, eficácia e segurança ao ambiente são características importantes para aplicabilidade prática de um herbicida na agricultura. O objetivo deste estudo foi determinar a tolerância de dez cultivares de feijão ao saflufenacil, aplicado em condições de pré-emergência. O experimento foi realizado em delineamento experimental de blocos ao acaso com parcelas subdivididas com dez cultivares de feijão (IAPAR 81; IPR Tiziu; IPR Corujinha; BRS Estilo; BRS Talismã; BRS Esplendor; BRS Campeiro; BRS Radiante; BRS Vereda e Jalo precoce) alocadas nas parcelas e concentrações de saflufenacil (0; 14,7 e 29,4 g ha -1 ) nas subparcelas. Foram realizadas avaliações de estande aos 21 e 28 dias após aplicação (DAA) e estatura de plantas aos 28 e 35 DAA. Na maturação fisiológica avaliou-se estatura da planta, altura inserção da primeira vagem, número de vagens por planta, peso de 400 grãos e rendimento de grãos de feijão. A cultivar Talismã apresentou baixa sensibilidade ao herbicida e a cultivar Jalo Precoce elevada sensibilidade ao herbicida, considerando-se todas as variáveis analisadas.Termos para indexação: Seletividade, inibidor da Protox, Phaseolus vulgaris.

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Section: Resultsmentioning

confidence: 99%

Tolerance of dry bean cultivars to saflufenacil

et al. 2014

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“…In commercial cultivars, similar injuries were also observed after the application of herbicides in sugarcane ratoons. Injuries up to 25% were observed in a clayey soil by Schiavetto et al (2012), due to the use of metribuzin (1920 g ha -1 ) + diuron (842 g ha -1 ) + hexazinona (238 g ha -1 ), and by Zera et al (2011) when applying ametryn (1463 g ha -1 ) + trifloxysulfuron-sodium (37 g ha -1 ).…”

Section: Resultsmentioning

confidence: 99%

Selectivity of herbicides in the post-emergence sugarcane seedlings in primary selection fields

et al. 2019

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The hypothesis here proposed is that, in primary fields of mass selection (F1) of sugarcane, herbicides exert a selective action when applied in the early post-emergence of seedlings (POST-i) and supplemented after their establishment phase (POST-l) even in sandy soils. To verify such hypothesis, the selectivity of herbicides was studied on seedlings of three sugarcane families, after their application both at early and late post-emergence in primary selection fields (F1). The field had a randomized blocks design, with five replications, and the subdivided plots scheme was used. Twelve herbicide treatments were allocated in the plots (27 m-2), whereas the sub-plots (9 m-2) contained three families of seedlings. Each sub-plot consisted of a transplanted row (0.5 x 1.50 m) with 12 individuals of the same family. Six treatments were employed, namely, T1: tebuthiuron (1200 g ha-1) post-i + ametryn (3000 g ha-1) post-l; T2: diuron (1404 g ha-1) + hexazinone (396 g ha-1) post-i + ametryn (3000 g ha-1) post-l; T3: sulfentrazone (800 g ha-1) post-i + ametryn (3000 g ha-1) post-l; T4: diuron (1404 g ha-1) + hexazinone (396 g ha-1) post-i + metribuzin (1920 g ha-1) post-l; T5: sulfentrazone (800 g ha-1) post-i + metribuzin (1920 g ha-1) post-l, and T6: weeded plot. The sugarcane families were: F400 (♀IAC086155 x ♂unknown), F43 (♀IACBIO264 × ♂IAC911099), and F14 (♀IACSP991305 × ♂GlagaH). We concluded that the herbicides tebuthiuron (1200 g ha-1), diuron (104 g ha-1) + hexazinone (396 g ha-1), or sulfentrazone (800 g ha-1), when applied in the early post-emergence and supplemented with ametryn (3000 g ha-1) or metribuzin (1920 g ha-1) in late post-emergence (60 days from planting) of the sugarcane families studied, were selective to the seedlings. That is, no toxicity symptoms with a potential to impede the final selection of seedlings occurred.

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“…Nas demais cultivares, constataram-se reduções nos índices SPAD à medida que se aumentou a dose do herbicida. Zera et al (2011) também verificaram que o teor de clorofila total de seis cultivares de cana-de-açúcar foi reduzido pela aplicação de clomazone, o que provocou branqueamento nas folhas.…”

Section: Resultsunclassified

Potencial de utilização do clomazone em cultivares de feijoeiro comum

Takano

Oliveira²,

Constantin³

et al. 2012

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Resumo -A interferência de plantas daninhas pode causar sérios danos à produtividade da cultura do feijão. Embora o uso de herbicidas seja eficiente no controle dessas espécies, existem poucas alternativas de moléculas para serem utilizadas em pré-emergência da cultura. Objetivouse com o trabalho verificar a seletividade do clomazone aplicado em pré-emergência em cinco variedades de feijoeiro. Os experimentos foram conduzidos em casa de vegetação em delineamento inteiramente casualizado. Os tratamentos foram constituídos por doses de clomazone (0, 300, 600 e 900 g ha -1 ) aplicadas em cultivares de feijoeiro (Diamante Negro, Jalo Precoce, Pérola, BRS Pontal e BRS Radiante). Foi verificado que o aumento da dose do herbicida provocou maiores sintomas de intoxicação em todas as cultivares. O incremento da dose também provocou redução na taxa de crescimento da cultura, do teor de clorofila e da massa seca em todos as cultivares, exceto para BRS Pontal. A cultivar Jalo Precoce foi a mais prejudicada nessas variáveis. Aos 28 dias após a emergência (DAE), o teor de clorofila da cv. BRS Radiante não foi alterado com o aumento da dose de clomazone. Para a cv. BRS Pontal, o aumento da dose até 900 g ha -1 não provocou variação na altura aos 28 DAE, no teor de clorofila e na massa seca da parte aérea. Palavras-chaves: pré-emergente, seletividade, Phaseolus vulgaris, intoxicaçãoAbstract -Weed interference can cause severe damages to common bean grain yield. Although the use of herbicides is considered as a efficient means to control weeds there are just a few alternatives to use in pre-emergence applications. The objective of this work was to evaluate the potential use of pre-emergence applications of clomazone for five cultivars of common bean. Experiments were carried out under greenhouse conditions in a completely randomized design, and the treatments were increasing rates of clomazone (0, 300, 600 and 900 g ha -1 ) applied to five cultivars of common bean: Diamante Negro, Jalo Precoce, Pérola, BRS Pontal and BRS Radiante. Increased rates of clomazone caused more visual injuries for all varieties. Increased rates of clomazone also inhibited plant growth, chlorophyll content and shoot dry mass for all cultivars except BRS Pontal. Cultivar Jalo Precoce was the most sensitive in relation to all parameters of crop injury. Chlorophyll contents in cv. BRS Radiante at 28 days after crop emergence (DAE) was not changed with increases in clomazone rate. For cv. BRS Pontal, 1 Recebido para publicação em

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Tolerância de diferentes cultivares de cana-de-açúcar (Saccharum spp.) A herbicidas

Cited by 8 publications

References 16 publications

Tolerance of dry bean cultivars to saflufenacil

Tolerance of dry bean cultivars to saflufenacil

Selectivity of herbicides in the post-emergence sugarcane seedlings in primary selection fields

Potencial de utilização do clomazone em cultivares de feijoeiro comum

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