Atrazine Accentuates Carryover Injury from Mesotrione in Vegetable Crops

Abstract

Trials were established in 2003, 2004, and 2005 in Ontario to determine the effects of residues of mesotrione, atrazine, and mesotrione plus atrazine 1 and 2 yr after application on broccoli, carrot, cucumber, onion, and potato. One yr after mesotrione application, injury was 43, 37, 18, 24, and 0% in broccoli, carrot, cucumber, onion, and potato, respectively. The addition of atrazine to mesotrione in the year before planting increased injury to 55, 53, 30, 42, and 3% in broccoli, carrot, cucumber, onion, and potato, respectively. Plant dry weight and yield were also decreased by mesotrione residues the year after application in all crops except potato. The addition of atrazine to mesotrione accentuated the reduction in dry weight and yield in broccoli, carrot, cucumber, and onion. There was no injury, or reductions in dry weight or yield in any crop planted 2 yr after application of mesotrione alone or in tank mix with atrazine. A recropping interval of 2 yr is recommended following applications of mesotrione or mesotrione plus atrazine for broccoli, carrot, cucumber, and onion. Potato can be safely planted the year following application of mesotrione plus atrazine.

Carryover de herbicidas em sistemas cultivados com olerícolas

“…However, the residue of herbicides in the soil can lead to contamination of surface and groundwater (Marchesan et al, 2010;Otto et al, 2012;Santos et al, 2015), besides causing intoxication and harm the growth and development of crops in succession (Artuzi and Contiero, 2006;Dan et al, 2010;Mancuso et al, 2011). This toxicity may or may not be visible and result in reduction of growth, the quality and productivity of the culture, even in the presence of low concentrations of herbicide in the soil (Robinson, 2008).…”

Simulação do efeito residual da atrazine em cenoura

“…2016 horticultura horticultura brasileira brasileira A s hortaliças são comumente cultivadas em rotação com milho e soja, por agregarem maior valor às culturas tradicionais produtoras de grãos, principalmente, quando se trata de milho doce (Zea mays, grupo saccharata), no qual o controle das plantas daninhas é realizado por meio de herbicidas. Dessa forma, essa rotação pode possibilitar aos produtores a utilização de uma ampla gama de herbicidas registrados para as culturas que auxiliam no manejo de plantas daninhas que são difíceis de controle em hortaliças (Robinson, 2008). Contudo, esses herbicidas podem permanecer no solo por longo período, causando injúria às hortaliças cultivadas em sucessão.…”

“…Portanto, posiciona--se como um importante produto do agronegócio brasileiro, principalmente, por apresentar elevada capacidade de geração de empregos e renda em todos os segmentos de sua cadeia produtiva durante o ano inteiro. Robinson (2008), estudando o efeito residual de atrazine em solo franco arenoso, constatou redução de 66,6% na massa seca de parte aérea de plantas de cenoura cultivadas um ano após a aplicação. Isso demonstra que o desenvolvimento de espécies hortícolas pode ser afetado quantitativamente quando expostas a subdoses de herbicidas e, provavelmente qualitativamente também.…”

<b>Carryover of tembotrione and atrazine affects yield and quality of potato tubers

“…Atrazine carryover potential associated with other herbicides was investigated in cabbage and beet (Soltani, Sikkema, & Robinson, 2005), carrot (Bontempo et al, 2016), potato, broccoli, onion and cucumber (Robinson, 2008). According to Robinson (2008) the atrazine accentuates the toxic effects caused by the mesotrione carryover in the soil on several vegetable crops.…”

“…Atrazine carryover potential associated with other herbicides was investigated in cabbage and beet (Soltani, Sikkema, & Robinson, 2005), carrot (Bontempo et al, 2016), potato, broccoli, onion and cucumber (Robinson, 2008). According to Robinson (2008) the atrazine accentuates the toxic effects caused by the mesotrione carryover in the soil on several vegetable crops. In a study completed in Brazilian soils, under tropical conditions, a reduction of the total yield of carrot was observed, grown in succession to corn, caused by the carryover of atrazine + tembotrione (Bontempo et al, 2016).…”