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Dinâmica, eficácia e seletividade do diclosulam em condições de cana crua

Authors: Perim, Lucas;

Dinâmica, eficácia e seletividade do diclosulam em condições de cana crua

Abstract

Due to increasing use of herbicide diclosulam in sugarcane weed control and the need for further data on the dynamics and efficiency of this herbicide, the objective of this study was to evaluate the dynamics of diclosulam applied in sugarcane straw, as well the effect of straw moisture on the dynamics, the availability of diclosulam in the soil solution and the selectivity and efficacy of weed control. The first study evaluated the effect of four doses of the herbicide diclosulam (Trade name: Coact*): 70,5; 88,3; 105,8 and 126 g a.i. ha-1 in different periods (0, 1, 7, 14 Days After Aplication) at 10 t ha-1 straw of cane sugar on the rain simulated of 5, 10, 25, 50 and 100 mm. The second study evaluated the effect of straw moisture on the dynamics; the dose used was 105.8 g a.i. ha-1 of diclosulam. The 4 straw that received the herbicide was previously subjected to a rain of 20 mm. And following after application, the rainfall simulation were made at the time of application. The third study was evaluated the diclosulam availability in the soil solution was carried out in a green area in Barra Bonita/SP, in sandy soil with held in area with straw and area without straw. Soil samples were collected at 0-10, 10-20 and 20-40 cm at 40, 95 and 140 DAA. In the same area in which the fourth study evaluated the efficacy and selectivity of diclosulam at the control of Cyperus rotundus, Ipomoea grandifolia and Brachiaria plantaginea. To carry out the analysis of dynamic studies and quantification of diclosulam in soil was used an LC-MS / MS system consisting of a Liquid Chromatography High Performance (HPLC). The results concluded that the first 20 mm of rainfall, are critical to leaching diclosulam of sugarcane straw to the soil. The removal of diclosulam in straw is reduced by increasing the interval between the application and the first rain, regardless of the dose used. The application on ...

Devido a utilização crescente do herbicida diclosulam no controle de plantas daninhas na cultura de cana-de-açúcar e a necessidade de dados mais aprofundados sobre a dinâmica e eficiência desse herbicida, este trabalho teve como objetivos avaliar a dinâmica do diclosulam aplicado na presença da palha de cana-de-açúcar, assim como o efeito da umidade na palha na dinâmica deste, sua disponibilidade do na solução do solo e a seletividade e eficácia do herbicida diclosulam no controle de plantas daninhas importande na cultura da cana-de-açúcar. No primeiro estudo avaliou-se o efeito de quatro doses do herbicida diclosulam (Produto Comercial - Coact*): 70,5 ; 88,3 ; 105,8 e 126 g i.a ha-1 em diferentes períodos de permanência (0; 1; 7 e 14 DAA) em 10 t.ha-1 de palha de cana-de-açúcar em função das precipitações simuladas de 5; 10; 25; 50 e 100 mm. No segundo estudo avaliou-se o efeito da umidade na palha da cana-de-açúcar, utilizando a dose de 105,8 g i.a ha-1. A palha que recebeu o herbicida, foi previamente submetida a uma chuva de 20mm e na sequência após a aplicação, foram realizadas as lâminas de chuvas no momento da aplicação. No terceiro estudo quantificou-se a disponibilidade do diclosulam na solução do solo, o qual foi instalado em áreas de cana crua no munícipio de Barra Bonita, em solo arenoso com a aplicação realizada em área com palha e área sem palha. Foram realizadas amostragens de solo nas camadas de 0-10, 10-20 e 20-40 cm aos 40, 95 e 140DAA. Nessa mesma área foi realizada o quarto estudo no qual avaliou a seletividade e

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Pós-graduação em Agronomia (Horticultura) - FCA

Country
Brazil
Keywords

Herbicidas, Erva daninha - Controle, Lixiviação, Cana-de-açúcar, Sugar-cane

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    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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