O algodão como todas as plantas cultivadas, sofre perdas quanti-qualitativa com a competição das plantas daninhas, principalmente, por água, luz, nutrientes. O objetivo do trabalho foi verificar a eficácia dos herbicidas no controle das plantas daninhas, e a seletividade destes às plantas de algodão. O experimento foi conduzido numa área da Fazenda Experimental da Faculdade �Dr. Francisco Maeda�, localizada no município de Ituverava, SP, utilizando a variedade SS 9815 (Fabrika). A semeadura foi feita no dia 06/02/2007. O delineamento experimental utilizado foi em blocos ao acaso (DBC) com quatro repetições e quatro tratamentos.
Avaliou-se, além do controle de plantas daninhas aos 15, 26, 68 Dias Após a Aplicação (DAA), o número de nós e a altura de cinco plantas por parcela aos 114 DAA. Os valores experimentais obtidos foram analisados estatisticamente utilizando o teste F para análise da variância, e o teste de Tukey para comparação das médias. A formulação SIP 935 foi eficaz no controle das plantas daninhas, aos 68 DAA, e apresentou boa seletividade à cultura do algodão, independentemente da dose utilizada.
The cotton as all the cultivated plants, it suffers competition with the harmful plants for water, it shines, nutritious and other. Therefore we have to control those undesirable plants, because they interfere a lot in the development of the implanted culture. With that, the intention of that work was to verify the efficiency of the herbicides exactly in the control of the harmful plants, and the selectivity of these the culture of the cotton.
The experiment was driven in an area of Experimental Finance of University "Dr. Francisco Maeda", located in the municipal district of Ituverava, SP, using the variety SS 9815 (Fabrika), and the sowing was made on the 06/02/2007. To the installation in the casualizado delineation (DBC) with four repetitions each treatment. The control of harmful plants was evaluated to the 15, 26, 68 Dias After the Application (DAA), considering the control through visual evaluations with a witness to the side, it was also evaluated the number of us and the height of five plants by portion to 114 DAA. After the application, the experimental data were analyzed estatisticamente by the test F for analysis of the variance and to the test of Tukey for comparison of the averages.
Finally, the formulation SIP 935 was efficient in the control of the harmful plants, mainly to 68 DAA, and it presented good selectivity to the culture of the cotton, independently of the used dose.
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