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HERBICIDES EFFICIENCY AND SELECTIVITY ON WEED CONTROL IN THE SOYBEAN CROP EFICIÊNCIA E SELETIVIDADE DE HERBICIDAS NA CULTURA DA SOJA (Glycine Max (L. ) Merrill) EM ÁREA DE CERRADO

José Baldin Pinheiro, Paulo Alcanfor Ximenes, Lizz Kezzy de Morais and 1 more

Pesquisa Agropecuária Tropical · 2007

doi:10.5216/pat.v28i2.3002 (opens in a new tab)

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Abstract

&lt;!-- @page { margin: 2cm } --&gt; &lt;p class="western" align="justify"&gt;In order to evaluate the efficiency and selectivity of Boral (sulfentrazone), Scepter (imazaquin) and Sencor (metribuzin) on weed control in the soybean crop, a trial was carried out at Escola de Agronomia / Universidade Federal de Goiás. Six treatments were tested: 1- Boral 500 SC(1.2 l/ha); 2- Sencor 480 SC (1.0 l/ha); 3- Sencor 480 SC +Scepter 150 CE (0.6 + 0.8 1/ha); 4- Sencor 480 SC + Boral 500 SC (0.75 + 0.70 1/ha); 5- Not weeded control; 6- Weeded control. These treatments were planted as randomized blocks design with four replications. The soybean cultivar was MTBR-49 (Pioneira), sowing in 50 cm spacing and 20 plants/m density. There were not differences between the treatments in the first and second evaluation of &lt;em&gt;Sida&lt;/em&gt; &lt;em&gt;rhombifolia&lt;/em&gt; L., &lt;em&gt;Spermacoce&lt;/em&gt; &lt;em&gt;latifolia&lt;/em&gt; Aubl. and &lt;em&gt;Ipomoea&lt;/em&gt; &lt;em&gt;purpurea&lt;/em&gt; Lam. occurrence. There were differences between treatments for &lt;em&gt;Acanthospermum&lt;/em&gt; &lt;em&gt;australe&lt;/em&gt; (Loefl.) O. Kuntze at first evaluation (27 days after herbicides application and for &lt;em&gt;Brachiaria&lt;/em&gt; &lt;em&gt;decumbens&lt;/em&gt; Stapt.) and second evaluation (41 days after herbicides application). During the evaluations it was not found fitotoxicity.&lt;/p&gt; &lt;p class="western" align="justify"&gt;KEY-WORDS: Sulfentrazone; imazaquin; metribuzin; soybean.&lt;/p&gt;<br>&lt;!-- @page { margin: 2cm } --&gt; &lt;p class="western" align="justify"&gt;Com o objetivo de avaliar a eficiência e a seletividade dos produtos Boral (sulfentrazone), Scepter (lmazaquin) e Sencor (metribuzin) no controle de plantas daninhas na cultura da soja, instalou-se um ensaio na Escola de Agronomia da Universidade Federal de Goiás, no município de Goiânia - GO. O ensaio constituiu-se de seis tratamentos: l- Boral 500 SC (1,2 1/ha); 2- Sencor 480 SC (1,0 1/ha); 3- Sencor 480 SC + Scepter 150 CE (0,6 + 0,8 l/ha); 4 - Sencor 480 SC + Boral 500 SC (0,75 + 0,70 l/ha); 5- Testemunha sem capina e 6-Testemunha capinada. O delineamento foi o de blocos ao acaso com quatro repetições. Foi utilizado o cultivar de soja MTBR-49 (Pioneira), com espaçamento de 50 cm e com densidade de 20 plantas/m. Não houve diferenças significativas entre os tratamentos na primeira e segunda avaliações em relação à ocorrência das plantas daninhas guanxuma (&lt;em&gt;Sida&lt;/em&gt; &lt;em&gt;rhombifolia&lt;/em&gt; L.), erva-quente (&lt;em&gt;Spermacoce&lt;/em&gt; &lt;em&gt;latifolia&lt;/em&gt; Aubl.) e corda-de-viola (&lt;em&gt;Ipomoea&lt;/em&gt; &lt;em&gt;purpurea&lt;/em&gt; Lam.). Os tratamentos, porém, diferiram para as plantas daninhas arrapicho-rasteiro (&lt;em&gt;Acanthospermum&lt;/em&gt; &lt;em&gt;australe&lt;/em&gt; (Loefl.) O. Kuntze) na primeira avaliação (27 dias após a aplicação dos produtos) e &lt;em&gt;Brachiaria&lt;/em&gt; &lt;em&gt;decumbens&lt;/em&gt; Stapt. na segunda avaliação (41 dias após a aplicação dos produtos). Não foram observados problemas severos de fitotoxidez.&lt;/p&gt; &lt;p class="western" align="justify"&gt;PALAVRAS-CHAVE: Soja; sulfentrazone; imazaquin; metribuzin.&lt;/p&gt;

Abstract licence: CC BY

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