An Innovative Method to Evaluate the Impact of Temperature on Iodosulfuron-Methyl Selectivity to Oat Crop

Vidal, Ribas Antônio; Fipke, Marcus Vinícius; Queiroz, Andrew Rerison Silva de; Soares, Débora da Silva; Gherekhloo, Javid

doi:10.1590/s0100-83582017350100047

Cited by 3 publications

(2 citation statements)

References 16 publications

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“…Also, oat tolerance to iodosulfuron-methyl is greatly affected by the environmental conditions, especially by the air temperature (Vidal et al, 2017). High air temperature tends to increase the oat tolerance to the herbicide.…”

Section: Identification Of Tolerance Mechanismsmentioning

confidence: 99%

Selectivity of Iodosulfuron-Methyl to Oat Cultivars

et al. 2017

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-Weeds are among the main constraints to high grain yield on hexaploid oat (Avena sativa), but there are few herbicides registered for weed control on this cereal crop. The objectives of this study were to evaluate the impact of the iodosulfuron-methyl on grain yield of elite oat cultivars and investigate the mechanism of oat tolerance to this herbicide. A field experiment conducted in 2012 demonstrated there was no difference on grain yield between cultivars URS Guará and URS Guria, when iodosulfuron-methyl was used up to 4.5 g ha , did not affect the oat grain yield of the genotype UFRGS 14, but affected it on the cultivars URS Guará and URS Guria. In 2014, the oat grain yield of five cultivars, including URS Guará, URS Guria and UFRGS 14 was reduced by iodosulfuron-methyl even at only 2.5 g ha -1. The activity of the ALS enzyme, extracted from oat plants, was sensitive to iodosulfuron-methyl. The increment of the iodosulfuron-methyl effect on oat plants treated with herbicide-detoxification inhibitors (malathion + chlorpyrifos), or the reduction of the herbicide efficacy in plants sprayed with the stimulator of detoxification (mefenpyr-diethyl), suggest that iodosulfuron-methyl degradation is the mechanism involved on its selectivity to oat plants.Keywords: Avena sativa, detoxification, tolerance, acetolactate synthase inhibitor. RESUMO -As plantas daninhas estão entre os principais problemas para o alto rendimento de grãos em aveia hexaploide (Avena sativa), mas existem poucos herbicidas registrados para o controle de plantas daninhas nessa cultura de cereais. Os objetivos deste estudo foram avaliar o impacto do iodosulfuron-methyl no rendimento de grãos de cultivares de aveia elite e investigar o mecanismo de

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Section: Identification Of Tolerance Mechanismsmentioning

confidence: 99%

Selectivity of Iodosulfuron-Methyl to Oat Cultivars

et al. 2017

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“…The optimum temperature for rice production ranges from 20 to 35 °C during crop establishment, 30 to 33 °C from the vegetative stage to the flowering, and 20 to 25 °C during grain filling and maturation 1 . Cold stress during early vegetative stage may reduce plant stand and impair the ability of rice to detoxify herbicides, reducing herbicide selectivity 4 . Rice producers in southern Brazil have frequently observed high injury on rice seedlings after bispyribac‐sodium application during the cold period.…”

Section: Introductionmentioning

confidence: 99%

Acclimation to cold stress reduces injury from low temperature and bispyribac‐sodium on rice

Martini

Roma‐Burgos

Tseng

et al. 2021

Pest Management Science

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BACKGROUND In subtropical areas, early planting exposes rice seedlings to cold stress, impairing seedling growth and making them more vulnerable to other stresses including herbicide injury. The objectives of this work were: to evaluate the effect of cold stress on bispyribac‐sodium selectivity in rice; to determine the mechanisms of cold tolerance in sensitive (‘Epagri 109’) and tolerant (‘IRGA 424’) rice cultivars; and to ascertain that cold acclimatization influences bispyribac‐sodium selectivity in rice. RESULTS Prolonged cold stress caused high lipid peroxidation, increased rice injury, and stunted growth. Short‐term acclimation with cold stress reduced rice injury with bispyribac‐sodium. Total phenols were upregulated in rice exposed to cold stress. Prolonged cold stress increased the superoxide dismutase and catalase activity in IRGA 424. Antioxidant activity was higher in the cold‐tolerant than in the cold‐sensitive cultivar. Only catalase activity was responsive to bispyribac‐sodium. OsRAN2, OsGSTL2, and CYP72A21 were upregulated by cold and herbicide stress in both cultivars. OsGSTL2 was upregulated more in IRGA 424 than in Epagri 109. OsFAD8 was upregulated in cold‐sensitive rice exposed to short‐duration cold stress but was not responsive to bispyribac‐sodium. CONCLUSION Cold stress reduces bispyribac‐sodium selectivity in rice. Short‐term acclimation to cold stress reduces the effect of cold stress and enhances bispyribac‐sodium selectivity. The tolerance of rice (IRGA 424) to cold stress is due to differential induction of protection genes CYP72A21 and OsGSTL2 associated with herbicide metabolism, together with the accumulation of total phenols and higher activity of antioxidant enzymes.

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Sensitivity of sunflower cultivar PR63E82 to tribenuron and propaquizafop in different weather conditions

Tichý¹,

Jursík²,

Kolářová³

et al. 2018

PLANT SOIL ENVIRON

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The aim of this work was to verify and assess the tolerance of the PR63E82 (ExpressSun) sunflower cultivar to tribenuron, propaquizafop and their tank-mix combination in two rates under various weather conditions. Three small-plot field trials were carried out on sunflower in Prague, Czech Republic, from 2015 to 2017. High phytotoxicity (25–56%) of tribenuron (TBM) + non-ionic surfactant was observed in 2015 and 2016 when the sunflower was sown in mid-April. In 2017, phytotoxicity was significantly lower (4–6%), probably due to a later sowing of sunflower (May), and hence higher temperatures. The main symptoms of TBM phytotoxicity were leaf chlorosis, necrosis and growth retardation. Propaquizafop (PQF) injury was minimal in 2015 and 2017. A higher phytotoxicity (10–13%) was recorded in 2016, probably due to a hail which occurred 2 days after T2 (second application term (sunflower BBCH 14)) application. Plant injury had puckered leaves and also made more side branches. TBM + PQF damaged sunflower plants most of the tested herbicide treatments (phytotoxicity 3–62%). High phytotoxicity caused stem branching, increased number of sunflower heads and decreased yield.

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An Innovative Method to Evaluate the Impact of Temperature on Iodosulfuron-Methyl Selectivity to Oat Crop

Cited by 3 publications

References 16 publications

Selectivity of Iodosulfuron-Methyl to Oat Cultivars

Selectivity of Iodosulfuron-Methyl to Oat Cultivars

Acclimation to cold stress reduces injury from low temperature and bispyribac‐sodium on rice

Sensitivity of sunflower cultivar PR63E82 to tribenuron and propaquizafop in different weather conditions

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