Interação e eficácia de flumioxazin e pyroxasulfone e influência do período de seca após aplicação em ambiente de cana-de-açúcar

Presoto, Jéssica Cursino

doi:10.11606/d.11.2020.tde-14082020-103144

Cited by 1 publication

(1 citation statement)

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“…Meyer et al (2016) reported 98% waterhemp control with pyroxasulfone/flumioxazin applied preemergence 3 WAA. Pyroxasulfone and flumioxazin interactions for control of other weed species were mostly additive in research conducted by Presoto (2020) and mostly synergistic in a study conducted by Sievernich et al (2011). Interaction effects of the co-application of pyroxasulfone and flumioxazin appear to be specific to weed species and herbicide rate.…”

Section: Resultsmentioning

confidence: 97%

The interaction of pyroxasulfone and flumioxazin applied preemergence for the control of multiple-herbicide-resistant waterhemp (Amaranthus tuberculatus) in soybean

et al. 2022

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Six field experiments were conducted to investigate any interaction between pyroxasulfone and flumioxazin on soybean tolerance and control of multiple-herbicide-resistant (MHR) waterhemp in soybean during 2016 and 2017 in Ontario, Canada. There was a synergistic increase in soybean injury with the co-application of pyroxasulfone and flumioxazin at all rates evaluated at 2 weeks after emergence (WAE), the two highest rates evaluated (134/106 and 268/211 g ai ha−1) at 4 WAE, and the highest rate (268/211 g ai ha−1) evaluated at 8 WAE. Soybean injury with all pyroxasulfone and flumioxazin treatments was transient and had no adverse effect on soybean grain yield. Pyroxasulfone applied preemergence (PRE) at 45, 89, 134, and 268 g ai ha−1 controlled MHR waterhemp up to 72, 89, 92, and 95%, respectively. Flumioxazin applied PRE at 35, 70, 106, and 211 g ai ha−1 controlled MHR waterhemp up to 78, 90, 93, and 96%, respectively. Pyroxasulfone/flumioxazin applied PRE at 45/35, 89/70, 134/106, and 268/211 g ai ha−1 controlled MHR waterhemp up to 92, 96, 98 and 100%, respectively. There were no significant antagonistic or synergistic interactions for the control of MHR waterhemp with pyroxasulfone/flumioxazin at rates evaluated except at 268/211 g ai ha−1 which provided a synergistic increase in MHR waterhemp control at 4 WAE. The MHR waterhemp biomass and density reductions followed a similar trend as visible control. Pyroxasulfone/flumioxazin at 268/211 g ai ha−1 caused a synergistic response in biomass reduction (9% difference). Based on these results, there is an additive increase in MHR waterhemp control and potential for synergistic soybean injury with the co-application of pyroxasulfone plus flumioxazin.

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Section: Resultsmentioning

confidence: 97%