Effects of agricultural spray adjuvants in surface tension reduction and spray retention on Eucalyptus leaves

Prado, Evandro Pereira; Raetano, Carlos Gilberto; Pogetto, Màrio Henrique Ferreira do Amaral Dal; Chechetto, Rodolfo Glauber; Filho, Pedro José Ferreira; Magalhães, Anderson Chagas; Miasaki, Celso Tadao

doi:10.5897/ajar2016.11349

Cited by 15 publications

(8 citation statements)

References 22 publications

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“…A característica acidificante do adjuvante lecitina e ácido propiônico, provavelmente foi a responsável por elevar o potencial fitotóxico do herbicida paraquat, visto que, os outros adjuvantes testados não apresentam tal propriedade. Nota-se também que, a redução da tensão superficial da calda não aparece como fator predominante na promoção da fitotoxidade do herbicida, visto que, dentre os demais adjuvantes testados, os adjuvantes siliconados aparecem na literatura sendo os produtos que mais promovem a redução da tensão superficial, com valores próximos de 20 mN m -1 na concentração testada nesse experimento (BAIO et al, 2015;PRADO et al, 2016).…”

Section: Resultsunclassified

“…Comparando com outros adjuvantes, o tratamento com o adjuvante siliconado não diferiu significativamente do tratamento composto somente pelo herbicida, tendo um desempenho similar ao do tratamento com óleo mineral, que promove a redução da tensão superficial para valores próximos de 30 mN m -1 , enquanto que a redução proporcionada pelo o adjuvante lecitina e ácido propiônico reduz a tensão superficial para valores em torno de 39 mN m -1 (PRADO et al, 2016), evidenciando que, nas condições deste experimento, menores valores de tensão superficial da calda não promoveram a potencialização da fitotoxicidade do herbicida paraquate.…”

Section: Resultsunclassified

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Otimização da atividade de herbicidas com diferentes adjuvantes na fitotoxicidade de Digitaria insularis no estádio de florescimento

Neto¹,

Almeida²,

Prado³

et al. 2019

COLLOQ AGRARIAE

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ResumoO presente trabalho teve como objetivo quantificar o efeito proporcionado pela interação entre os herbicidas clethodim e paraquat associados com diferentes classes de adjuvantes na fitotoxicida de de Digitaria insularis no estádio de florescimento. Os herbicidas foram aplicados nas doses de 0; 6,25; 12,5; 25; 50; 75 e 100% da recomendada pelo fabricante, de forma isolada e em mistura com os adjuvantes: nonil fenoxi poli (etilenoxi) etanol (0,05%); copolímero de poliéter e silicone (0,1%); lecitina e ácido propiônico (0,5%) e óleo mineral (0,5%) no delineamento inteiramente casualizado com cinco repetições em esquema fatorial (doses dos herbicidas x adjuvantes). O efeito fitotóxico foi visualmente avaliado aos 12 dias após aplicação (DAA) para o herbicida paraquat e aos 21 DAA para o herbicida clethodim. Verificou-se em plantas de D. insularis fitotoxidade potencializada para o herbicida clethodim nos tratamentos com os adjuvantes nonil fenoxi poli (etilenoxi) etanol, lecitina e ácido propiônico e óleo mineral. Para o herbicida paraquat, a potencialização da fitotoxicidade nas plantas de D. insularis foi proporcionada somente pelo tratamento com o adjuvante lecitina e ácido propiônico. Palavras-chave: tecnologia de aplicação de defensivos; capim-amargoso; controle químico; planta daninha. Optimizing activity of herbicides with different adjuvant on phytotoxicity of Digitaria insularis at flowering stage

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Section: Resultsunclassified

Otimização da atividade de herbicidas com diferentes adjuvantes na fitotoxicidade de Digitaria insularis no estádio de florescimento

Neto¹,

Almeida²,

Prado³

et al. 2019

COLLOQ AGRARIAE

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“…The occurrence of herbicide-resistant weeds in sufficient density to limit crop yields signals the need to change the management practice used (Mwendwa et al, 2018) and improving the effectiveness of herbicides. One way to enhance the performance of herbicides is the addition of corrected adjuvants on tank-mixture (Prado et al, 2016;Alves et al, 2019), although this are not active ingredients, they influence application efficiency (Maciel et al, 2014). The mineral oil, for instance, is known to increase the efficiency of ACCase-inhibiting herbicides (Costa et al, 2013), in this way, those herbicides should be always used in association with an adjuvant (Sharma & Renjith, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Achieving maximum agronomic efficiency in the postemergent management of weed species under no-till systems requires not only studies on the best application times, but combining available herbicides with adjuvants (Travlos, Cheimona & Bilalis, 2017;Prado et al, 2016)). Given that adjuvants enhance the effects of herbicides, the package inserts for all ACCase inhibitors recommend the addition of adjuvants.…”

Section: Introductionmentioning

confidence: 99%

New Formulation of Clethodim/Adjuvant at Control of Grass Weeds for Soybean Crops

Betto

Dysarz

Cinelli

et al. 2020

JAS

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The use of ACCase-inhibiting herbicides without the correct addition of an adjuvant is a major cause of inefficient poaceous weed control. As such, this study aimed to assess the efficiency of a new clethodim/adjuvant formulated mixture in postemergence weed control for soybean crops. Two field experiments were conducted in the 2015/16 and 2016/17 growing seasons. A randomized block design, consisting of ten treatments with four repetitions, was used. The treatments and doses were: clethodim (108 g a.i. ha-1) + Lanzar® (0.5%), clethodim (108 g a.i. ha-1) + Nimbus® (0.5%), clethodim/adjuvant formulation at doses of (84 g a.i. ha-1), (96 g a.i. ha-1), (108 g a.i. ha-1), (120 g a.i. ha-1), (132 g a.i. ha-1), and (144 g a.i. ha-1), and a control with and without weeding. The formulated clethodim/adjuvant mixture showed high control at 7 days after application (DAA) in the 2015/16 growing season. At 28 DAA, formulation doses of 108 g a.i. ha-1 and higher exhibited superior weed control and the highest crop yields. Therefore, the use of correct adjuvant or formulated mixture is essential to increase the efficiency of clethodim herbicide.

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“…The herbicide aminopyralid + fluroxypyr is indicated for the control of several pasture weeds, including S. obtusifolia, and is recommended for post-emergence application, which must be added by 0.3% (v v -1 ) of adjuvants (AGROFIT, 2017). Adjuvants are added to the spray solution directly in the sprayer tank to meet some specific demand regarding physicochemical and biological properties of the spray solution by phytosanitary products, besides allowing a better distribution, deposition, and retention of droplets on the leaf surface and better absorption and penetration of the product in the weed (DECARO et al, 2016;PRADO et al, 2016;. Each adjuvant has specific properties, and the proper selection is important for efficient application, given the interaction with leaf chemical composition and the way this interaction takes place (KISSMANN, 1998).…”

Section: Introductionmentioning

confidence: 99%

Does the sequence of addition of herbicide and adjuvants to the spray solution influence sicklepod control?

et al. 2019

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The use of adjuvants associated with herbicides aims at improving the performance of application and the consequent increase in the biological effect of the treatment. However, the sequence of product added to the sprayer tank can influence the phytosanitary spray solution. Thus, this study aimed to evaluate the control of Senna obtusifolia as a function of the sequence of addition of the herbicide aminopyralid + fluroxypyr and adjuvants in the preparation of spray solution. Two herbicide doses (1 and 2 L c.p. ha-1) associated with the adjuvants mineral oil (MO), silicone polyether copolymer (SIL), and a mixture of phosphatidylcholine and propionic acid (LEC), all in the proportion of 0.3% v v-1, with alternate addition to the spray solution to evaluate the effects of the preparation sequence. The spray solution volume considered was 150 L ha-1. Evaluations of spray solution stability were performed from the visual evaluation of homogeneity, electrical conductivity, and pH. The effect of treatment on S. obtusifolia control was measured using a scoring scale and dry matter. Correlation coefficients between the evaluations were also determined. No difference of the preparation sequence of spray solution was observed for stability, pH, and electrical conductivity, but an influence was observed on S. obtusifolia control, without changing dry matter accumulation. The treatment with the adjuvant LEC previously added to the herbicide provided a higher control rate at the highest dose, while the adjuvant SIL had the opposite effect.

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Effects of agricultural spray adjuvants in surface tension reduction and spray retention on Eucalyptus leaves

Cited by 15 publications

References 22 publications

Otimização da atividade de herbicidas com diferentes adjuvantes na fitotoxicidade de Digitaria insularis no estádio de florescimento

Otimização da atividade de herbicidas com diferentes adjuvantes na fitotoxicidade de Digitaria insularis no estádio de florescimento

New Formulation of Clethodim/Adjuvant at Control of Grass Weeds for Soybean Crops

Does the sequence of addition of herbicide and adjuvants to the spray solution influence sicklepod control?

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