Dissipation and phytotoxicity of imazethapyr and imazamox in soils amended with β-cyclodextrin-chitosan biocomposite

Kaur, Paawan; Kaur, Parmeet; Kaur, Navjyot; Jain, Deepali; Singh, Kuldip; Bhullar, Makhan S.

doi:10.1016/j.scitotenv.2020.139566

Cited by 16 publications

(2 citation statements)

References 31 publications

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“…The impact of herbicides on dehydrogenase activity has been widely investigated with researchers mostly reporting a temporary inhibitory effect [26,32,33]. Kaur et al [34] proved that after application of imidazoline (imazamox and imazethapyr), dehydrogenase activity in soil decreased and that after a certain time, dehydrogenase activity increased. Even though the interpretation and understanding of enzymatic responses after the application of pesticides are very difficult because there are numerous direct and/or indirect interactions of pesticides with soil enzymes [35], some authors [36] reported that herbicide effects on soil enzymes depend on their mechanism of action.…”

Section: Discussionmentioning

confidence: 99%

Effect of Herbicide Clopyralid and Imazamox on Dehydrogenase Enzyme in Soil of Regenerated Pedunculate Oak Forests

Vasić

Hajnal-Jafari

Djurić

et al. 2022

Forests

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Clopyralid and imazamox are successfully used for weed control during the first years of regeneration of pedunculate oak forests. Hence, the question that arises is how these herbicides affect microorganisms, especially the activity of dehydrogenase enzyme, when they reach the soil. Two study sites were selected in regenerated pedunculate oak forests, and the two herbicides were applied in two doses that are used for weed control (clopyralid, 100 g a.i. ha−1 and 120 g a.i. ha−1; imazamox, 40 g a.i. ha−1 and 48 g a.i. ha−1). The effect of the herbicides was evaluated 7, 14, 21, 30, and 60 days after application. A significant reduction in dehydrogenase activity was found on days 7 and 14 at both sites. However, after 14 days there was a recovery of dehydrogenase activity for all treatments such that the values obtained on day 21 did not differ from the control values. The effect of clopyralid and imazamox on dehydrogenase activity was not dose-dependent. Dehydrogenase activity also depended on soil properties, soil sampling time and climatic conditions during the investigation years. The results show that clopyralid and imazamox can reduce soil dehydrogenase activity, but this effect is transient. This can be attributed to the ability of microorganisms to overcome the stress caused by the herbicide by developing the capability to utilize herbicides as a nutrient source and proliferating in such an environment.

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Section: Discussionmentioning

confidence: 99%

Effect of Herbicide Clopyralid and Imazamox on Dehydrogenase Enzyme in Soil of Regenerated Pedunculate Oak Forests

Vasić

Hajnal-Jafari

Djurić

et al. 2022

Forests

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“…The first symptoms may appear 2 days after application, but the death of the plants may take 2-3 weeks [33]. Imazamox has high persistence in soil and high solubility in water, which gives it high potential to injure the succeeding crops [34]. In a previous study, Soltani et al [35] reported that the recommended doses of imazethapyr in dry bean can be reduced by combining them with trifluralin.…”

Section: Introductionmentioning

confidence: 99%

Determination of Minimum Doses of Imazamox for Controlling Xanthium strumarium L. and Chenopodium album L. in Bean (Phaseolus vulgaris L.)

Gürbüz

Yentürk

2022

Agronomy

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This study was conducted to investigate the minimum doses of the imazamox active ingredient (ai) that provide satisfactory efficacy (>90%) against fat hen (Chenopodium album L.) and common cocklebur (Xanthium strumarium L.). These two weeds are among the most troublesome weeds of bean fields. The minimum dose studies were carried out separately in the 2–4 and 6–8 true leaf stages of both weeds. The experiments were carried out in pots under greenhouse conditions. The experiments were repeated three times. In the first two experiments, the recommended dose of imazamox (100%) together with 75%, 50% and 25% doses were applied to the weeds during the above-mentioned leaf stages. Some pots were left untreated for control. In the third experiments, 12.50% and 6.25% of the recommended doses were also tested. Plant height and the number of leaves were recorded on the 1st, 3rd, 5th, 7th, 14th, 21st and 28th days following the herbicide application. As a result of the studies, it was determined that nearly half the recommended dose (48.18 g ai/da) provides 90% success in the control of common cocklebur (X. strumarium) when applied at the 2–4 true leaf stages, while a lower dose (36.11 g ai/da) is required for obtaining the same control when applied at the 6–8 true leaf stages. For the fat hen (C. album), only a 17.69 g ai/da application dose was found to provide 90% control at the period of 2–4 true leaves, while 21.21 g ai/da was noted to provide 90% control when applied at the 6–8 true leaf stage. The results suggest that the increase in leaf area reduces the imazamox requirement for the control of X. strumarium.

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Degradation of imazethapyr in soil: impact of application rate, soil physicochemical properties and temperature

Kaur

2021

Int. J. Environ. Sci. Technol.

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Organisation de Coopération et de Développement Économiques Organisation for Economic Co-operation and Development 04-Mar-2016 ___________________________________________________________________________________________ _____________ English -Or. English ENVIRONMENT DIRECTORATE JOINT MEETING OF THE CHEMICALS COMMITTEE AND THE WORKING PARTY ON CHEMICALS, PESTICIDES AND BIOTECHNOLOGY Guidance Document for Conducting Pesticide Terrestrial Field Dissipation Studies Series on Testing & Assessment No. 232 Series on Pesticides No. 82 JT03391244 Complete document available on OLIS in its original format This document and any map included herein are without prejudice to the status of or sovereignty over any territory, to the delimitation of international frontiers and boundaries and to the name of any territory, city or area.

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Dissipation and phytotoxicity of imazethapyr and imazamox in soils amended with β-cyclodextrin-chitosan biocomposite

Cited by 16 publications

References 31 publications

Effect of Herbicide Clopyralid and Imazamox on Dehydrogenase Enzyme in Soil of Regenerated Pedunculate Oak Forests

Effect of Herbicide Clopyralid and Imazamox on Dehydrogenase Enzyme in Soil of Regenerated Pedunculate Oak Forests

Determination of Minimum Doses of Imazamox for Controlling Xanthium strumarium L. and Chenopodium album L. in Bean (Phaseolus vulgaris L.)

Degradation of imazethapyr in soil: impact of application rate, soil physicochemical properties and temperature

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