Seletividade do herbicida topramezone isolado e em mistura em variedades de cana-de-açúcar
Carregando...
Data
2010-02-23
Autores
Cardoso, Leonildo Alves [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Estadual Paulista (Unesp)
Resumo
Este trabalho teve como objetivo avaliar a seletividade do herbicida topramezone aplicado de forma isolado e em mistura com tebuthiuron, em pós-emergência inicial sobre dez variedades de cana-de-açúcar em condição de cana-planta. O experimento foi conduzido na Fazenda Experimental Lageado, pertencente a FCA/UNESP – Botucatu/SP. Os tratamentos utilizados foram: topramezone + Dash (70 g ha-1 + 0,25% v/v-1); topramezone + tebuthiuron + Dash (70 + 1000 g ha-1 + 0,25% v/v-1); topramezone + tebuthiuron + Dash (100 + 1000 g ha-1 + 0,25% v/v-1) e ametryn + tebuthiuron (1500 + 1000 g ha-1), aplicados aos 35 DAP (dias após o plantio), além de uma testemunha sem aplicação. O delineamento experimental utilizado foi o de blocos casualizados em parcelas subdivididas com quatro repetições. As dez variedades utilizadas foram: SP 83 2847, SP 80 3280, RB 85 5453, SP 80 1842, SP 89 1115, RB 86 7515, PO 8862, RB 85 5156, SP 80 1816 e SP 81 3250. Para aplicação dos herbicidas, utilizou-se um pulverizador costal, pressurizado a CO2 e equipado com barra de aplicação com seis pontas Teejet XR 110 02VS, e um volume de aplicação foi de 200 L ha-1. As avaliações visuais de fitotoxicidade foram realizadas aos 7, 14, 28 e 35 dias após a aplicação (DAA), sendo que aos 28, 64 e 300 DAA dos herbicidas foram determinados os números de perfilhos por metro e aos 28 e 64 DAA determinou-se a altura média de 15 plantas nas duas linhas centrais da parcela. Ao final do estudo foram determinados os parâmetros tecnológicos como pol, fibra e brix e, os parâmetros produtivos como o comprimento, diâmetro e peso dos colmos e a produção de açúcar por parcela. A formulação isolada de topramezone seguida de suas misturas com tebuthiuron proporcionaram inicialmente severos sintomas visuais de injúrias às plantas...
The objective of this experiment was to evaluate the selectivity topramezone herbicide alone, and in a mixture with tebuthiuron. The herbicides were applied after sprouting to ten varieties of sugar cane on condition of first crop. This research was carried out on the Experimental field from São Paulo State University in Botucatu/SP city. The treatments were: topramezone + Dash (70 g ha-1 + 0.25% v/v-1); topramezone + tebuthiuron + Dash (70 + 1000 g ha-1 + 0.25% v/v-1); topramezone + tebuthiuron + Dash (100 + 1000 g ha-1 + 0.25% v/v-1) and ametryne + tebuthiuron (1500 + 1000 g ha-1) applied 30 DAP (days after planting). Treatments were organized in a randomized complete block split plot with 4 replications for each treatment. Ten varieties utilized in this study: SP 83 2847, SP 80 3280, RB 85 5453, SP 80 1842, SP 89 1115, RB 86 7515, PO 8862, RB 85 5156, SP 80 1816, and SP 81 3250. The herbicides treatments were applied using a CO2 pressurized backpack sprayer at 2.0 bar. The boom was equipped with six TeeJet XR 110 02VS flat fan nozzles, delivering a volume of 200 L ha-1. Visual fitotoxicity evaluations were taken 7, 14, 28, and 35 DAA (days after application). At 28, 64, and 300 DAA the number of tillers per meter were determined, and at 28 and 64 DAA average plant height was determined from 15 plants in two central lines of each plot. At the end of the study, technological parameters such as pol, fiber, and brix were determined. At this same stage, productive parameters such as length, diameter, stalk weight, and sugar production per plot were also determined. The formulation of topramezone alone followed its mixtures with tebuthiuron initially provided severe visual injury to the sugar cane plants, however the plants of all varieties tested had a total visual injury recovery... (Complete abstract click electronic access below)
The objective of this experiment was to evaluate the selectivity topramezone herbicide alone, and in a mixture with tebuthiuron. The herbicides were applied after sprouting to ten varieties of sugar cane on condition of first crop. This research was carried out on the Experimental field from São Paulo State University in Botucatu/SP city. The treatments were: topramezone + Dash (70 g ha-1 + 0.25% v/v-1); topramezone + tebuthiuron + Dash (70 + 1000 g ha-1 + 0.25% v/v-1); topramezone + tebuthiuron + Dash (100 + 1000 g ha-1 + 0.25% v/v-1) and ametryne + tebuthiuron (1500 + 1000 g ha-1) applied 30 DAP (days after planting). Treatments were organized in a randomized complete block split plot with 4 replications for each treatment. Ten varieties utilized in this study: SP 83 2847, SP 80 3280, RB 85 5453, SP 80 1842, SP 89 1115, RB 86 7515, PO 8862, RB 85 5156, SP 80 1816, and SP 81 3250. The herbicides treatments were applied using a CO2 pressurized backpack sprayer at 2.0 bar. The boom was equipped with six TeeJet XR 110 02VS flat fan nozzles, delivering a volume of 200 L ha-1. Visual fitotoxicity evaluations were taken 7, 14, 28, and 35 DAA (days after application). At 28, 64, and 300 DAA the number of tillers per meter were determined, and at 28 and 64 DAA average plant height was determined from 15 plants in two central lines of each plot. At the end of the study, technological parameters such as pol, fiber, and brix were determined. At this same stage, productive parameters such as length, diameter, stalk weight, and sugar production per plot were also determined. The formulation of topramezone alone followed its mixtures with tebuthiuron initially provided severe visual injury to the sugar cane plants, however the plants of all varieties tested had a total visual injury recovery... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Cana-de-açucar - Variedades, Herbicidas - Cana-de-açúcar, Topramezone, Tebuthiuron, Ametryn, Sugar cane, Topramezone, Tebuthiuron. eng, Ametryn
Como citar
CARDOSO, Leonildo Alves. Seletividade do herbicida topramezone isolado e em mistura em variedades de cana-de-açúcar. 2010. v, 58 f. Tese( doutorado) - Universidade Estadual Paulista , Faculdade de Ciências Agronômicas de Botucatu, 2010.