Techniques for mitigating the symptoms of injury of glyphosate in RR and RR2 soybean

• Autor(a) principal: Baccin,Luisa Carolina
• Data de Publicação: 2019
• Outros Autores: Krenchinski,Fábio Henrique, Albrecht,Leandro Paiola, Cruz,Gabriela Gayoso da, Albrecht,Alfredo Júnior Paiola, Mattiuzzi,Mateus Daupubel, Cantú,Carine, Pertuzati,Aline
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://scielo.pt/scielo.php?script=sci_arttext&pid=S0871-018X2019000400010
• topic: Glycine max L. Merr.; herbicides; yellow flashing; transgenic crops

The use of high rates of glyphosate, even if tolerant (RR) technology, can cause leaf insults, such as the yellow flashing effect, which is characterized by a yellowing of the leaves, which can lead to loss of yield. The present study aimed to increase doses of glyphosate in tolerant soybean. Tests were conducted in greenhouse 2015/2016 and 2016/2017, in Palotina, western region of Paraná in a completely randomized arrangement. The first assay was conducted in a 3x8 factorial set (products x cultivars) with four replicates mixed with glyphosate with growth regulator, one compound of amino acids and one source of manganese, and in the second a factorial scheme 6x3 (products x cultivars) using glyphosate, a growth regulator, a source of manganese and the glyphosate associated to the other products, besides a control without application. A phytotoxicity, chlorophyll index, shoot dry mass and root mass were evaluated visually. A variation of response to cultivar was observed due to characteristics of each genotype. The differences between the products were not observed. A cultivar ‘M6210’ presented greater symptom of crop injury while cultivating ‘BMX Ponta’, presenting greater tolerance. No phytotoxic effect was observed for the test.