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Master's Dissertation
DOI
Document
Author
Full name
Marcelo Galvão D'Agosto
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Piracicaba, 2019
Supervisor
Committee
Victoria Filho, Ricardo (President)
Albrecht, Leandro Paiola
Favarin, José Laercio
Lacerda, André Luiz de Souza
Title in Portuguese
Seletividade de herbicidas aplicados em pré e pós transplante de mudas pré-brotadas de cana-de-açúcar
Keywords in Portuguese
Cana-de-açúcar
Herbicida
MPB
Seletividade
Abstract in Portuguese
O emprego de mudas pré-brotadas (MPB) de cana-de-açúcar, no sistema canavieiro, cresceu imensamente nos últimos anos. Entretanto, a carência de informações no manejo com herbicidas no sistema pode comprometer a tecnologia. Com o objetivo de compreender melhor os efeitos causados por diferentes herbicidas aplicados em pré e pós-transplantes das MPBs de cana-de-açúcar da variedade CTC4, este estudo foi conduzido em duas etapas em diferentes condições. Os tratamentos foram definidos com base nos herbicidas mais usuais do setor. Ambos os experimentos foram conduzidos no centro de pesquisa da FMC em Paulínia (SP), onde efeitos como fitotoxicidade, altura, produtividade, número de perfilhos, número de colmos e germinação foram avaliados. Para o experimento de campo, observou-se que apesar de injúrias iniciais causadas por diversos herbicidas, apenas o sulfentrazone promoveu redução de produtividade, entretanto todos tratamentos aos 60 dias após à aplicação não apresentavam sintomas de fitotoxidez. A partir desse primeiro estudo, foi realizado em casa de vegetação outro experimento, buscando analisar os mesmos herbicidas em diferentes posicionamentos de aplicação e em dois tipos de solo. Quando posicionado em pré transplante os sintomas de injúrias foram mais elevados, comprometendo o desenvolvimento de alguns tratamentos. Neste caso, o diclosulam mostrou-se o menos seletivo independentemente do tipo de solo estudado, seguido pelo clomazone. Entretanto, a literatura mostra que resultados de seletividade variam de acordo com as condições empregadas e principalmente variedades da cultura, assim, repetições deste estudo devem ser realizadas para possibilitar uma melhor compreensão e validação dos dados.
Title in English
Selectivity of herbicides applied in pre and post transplant of pre-sprouted seedlings of sugarcane
Keywords in English
Herbicide
PSS
Selectivity
Sugarcane
Abstract in English
The use of pre-sprouted seedlings (PSS) of sugarcane in the sugarcane's system has grown immensely in recent years. However, lack of information on herbicide management in the system may compromise the technology. In order to better understand the effects caused by different herbicides applied in pre and post-transplantation of sugarcane MPBs variety CTC4, this study was conducted in two stages under different conditions. The treatments were defined based on the herbicides most common in the industry. Both experiments were conducted at the FMC research center in Paulínia (SP), where effects such as phytotoxicity, height, yield, number of tillers, number of stems and germination were evaluated. For the field experiment, it was observed that in spite of initial insults caused by several herbicides, only sulfentrazone promoted a reduction of productivity, however all treatments at 60 days after application did not present phytotoxicity symptoms. From this first study, another experiment was carried out in a greenhouse, trying to analyze the same herbicides in different application positions and in two types of soil. When positioned in pretransplantation the symptoms of injuries were higher, compromising the development of some treatment. In this case, diclosulam showed to be the least selective independent of the type of soil studied, followed by clomazone. However, the literature shows that selectivity results vary according to the conditions employed and mainly the crop varieties, thus, repetitions of this study should be performed to enable better understanding and validation of the data.
 
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Publishing Date
2019-08-19
 
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