2018
DOI: 10.1590/s0100-83582018360100131
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Abstract: The intensive use of glyphosate can select resistant populations. This study aimed at evaluating the occurrence of glyphosate resistance in populations of D. insularis in agricultural areas. Three experiments were conducted in randomized block experimental design with four replications. The Resistance Degree (RD) was determined by a dose-response curve in the evaluated populations: Experiment 2012, São Camilo (R01 and R02) and Palotina (R03, R04 and S05-susceptible); Experiment 2013 Palotina (R06 and R12), Kat… Show more

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Cited by 4 publications
(3 citation statements)
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“…O glifosato apresentou controle acima de 90% a partir da dose de 3000 g ha -1 aos 21 DAA, entretanto, aos 42 DAA houve tendência de diminuição do controle mesmo na maior dose (Figura 1A). Estes resultados evidenciam que a maior dose avaliada (4000 g ha -1 ) foi 2,2; 4,1; 1,6; e 5,5 vezes maior que a dose necessária para controlar 50% de alguns biótipos resistentes ao glifosato das espécies de Amaranthus palmeri, Conyza canadensis, Digitaria insularis, e Eleusine indica, respectivamente (Chahal et al, 2017;Kumar et al, 2017;Takano et al, 2017;Costa et al, 2018). Lacerda et al (2019), recomendaram aplicar 1440 g ha -1 de glifosato para obter controle superior a 80% das plantas daninhas Bidens pilosa, Commelina benghalensis, D. insularis, Ipomoea grandiofolia e Tridax procumbens avaliadas aos 21 DAA.…”
Section: Segundo Experimentounclassified
“…O glifosato apresentou controle acima de 90% a partir da dose de 3000 g ha -1 aos 21 DAA, entretanto, aos 42 DAA houve tendência de diminuição do controle mesmo na maior dose (Figura 1A). Estes resultados evidenciam que a maior dose avaliada (4000 g ha -1 ) foi 2,2; 4,1; 1,6; e 5,5 vezes maior que a dose necessária para controlar 50% de alguns biótipos resistentes ao glifosato das espécies de Amaranthus palmeri, Conyza canadensis, Digitaria insularis, e Eleusine indica, respectivamente (Chahal et al, 2017;Kumar et al, 2017;Takano et al, 2017;Costa et al, 2018). Lacerda et al (2019), recomendaram aplicar 1440 g ha -1 de glifosato para obter controle superior a 80% das plantas daninhas Bidens pilosa, Commelina benghalensis, D. insularis, Ipomoea grandiofolia e Tridax procumbens avaliadas aos 21 DAA.…”
Section: Segundo Experimentounclassified
“…Lacerda and Victoria Filho (2004) found that only 128.5 g ha -1 of glyphosate were enough to control 50% (DL50) of these plants. However, few years later, after a selection process of resistant biotypes, the required rates of glyphosate to obtain DL50 were higher than 2,880 g ha -1 (López-Ovejero et al, 2017;Costa et al, 2018).…”
Section: Introductionmentioning
confidence: 98%
“…Despite these advantages, the system has an important limitation, which is the common susceptibility of the two crops to some nematodes, especially Pratylenchus brachyurus, whose reproduction factor can be quite high in soybean and maize (Inomoto, 2011;Favoreto et al, 2019), and in numerous grass species, forage or not, grown in crop rotation, including plants of the genus Panicum and Urochloa (Inomoto et al, 2007;Dias-Arieira et al, 2009;Queiróz et al, 2014), and sorghum and millet (Inomoto et al, 2006). Added to these, the susceptibility to common weeds in the areas of soybean-maize succession, with emphasis on the sourgrass (Digitaria insularis) (Bellé et al, 2015;Matias et al, 2018), considered one of the main invaders in the soybean-maize system, due to resistance to herbicides (Pereira et al, 2017;Costa et al, 2018).…”
Section: Introductionmentioning
confidence: 99%