Pesticide Mobility: Determination by Soil Thin-Layer Chromatography

Helling, Charles S.; Turner, Benjamin C.

doi:10.1126/science.162.3853.562

Cited by 189 publications

(73 citation statements)

References 16 publications

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“…K oc values of three MC variants were calculated from their K d values in the three soils, the average values for MC-RR, LR and Dha 7 LR were 224, 46.3 and 84.8 respectively (Table 3). According to McCall and Helling's classifications (Table 4) (McCall et al, 1980;Helling and Turner, 1968), MC -LR belongs to a very high mobility class, Dha 7 LR belongs to a high mobility class and RR belongs to a medium mobility class. The results in Table 3 show the GUS values range from 1.48 to 2.06 for RR, 1.82 to 2.88 for LR and 1.76 to 2.09 for Dha 7 LR.…”

Section: Leach Behavior Of Mcs In Chinese Agriculture Soilsmentioning

confidence: 99%

Sorption, degradation and mobility of microcystins in Chinese agriculture soils: risk assessment for groundwater protection

Chen

Song

Gan

et al. 2006

Environmental Pollution

124

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Section: Leach Behavior Of Mcs In Chinese Agriculture Soilsmentioning

confidence: 99%

Sorption, degradation and mobility of microcystins in Chinese agriculture soils: risk assessment for groundwater protection

Chen

Song

Gan

et al. 2006

Environmental Pollution

124

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“…On the other hand, thin-layer chromatography is a simple and quick to measure herbicide mobility between soils (Helling and Turner, 1968), though the results are less precise than column measurements and, therefore, the method is not well accepted nowadays (Wauchope et al, 2002).…”

Section: Retentionmentioning

confidence: 99%

Experimental methods to evaluate herbicides behavior in soil

et al. 2018

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-Pesticides are an essential tool for agriculture, however, studies have been shown that only 45% of the sprayed products reach the target-crop, whereas 30% is drifted, 10% is lost due to transport processes (leaching, volatilization and runoff), and 15% reaches the soil. Moreover, only 1% of the applied product reaches the target, in other words, the pathogens, weeds and insects. Even though, risk assessments for environmental contamination due to off-target movement of a pesticide are mandatory and performed prior to its registration, these products are often detected contaminating non-target sites, and freshwater ecosystems are the main impaired. Various biological, physical and chemical processes determine the environment fate and the efficacy of these compounds. Thus, there are several experimental techniques used to evaluate the behavior of herbicides in soil. This review aims to summarize the most commonly used methods to describe and evaluate each process to which a herbicide is subjected in soil and, their advantages and disadvantages. In general, when studying the fate of pesticides in the environment, laboratory experiments provide more precise information because it is possible to control the environmental conditions and isolate the factors that interest the researcher. However, it is important to mention that there is not a more efficient method but there are methods that can provide a better result in a given situation. Thus, the method choice depends in the study aim and the available infrastructure. Keywords: adsorption, biodegradation, leaching, runoff, volatilization Resumo -O uso de agrotóxicos na agricultura é praticamente indispensável, contudo, estudos estimam que somente 45% do produto aplicado atinge a cultura, sendo que aproximadamente 30% sofrem deriva, 10% são perdidos por algum processo de transporte (lixiviação, volatilização e escoamento) e 15% atingem o solo. Além disso, do total aplicado, apenas 1% atinge o alvo, ou seja, patógenos, plantas daninhas e insetos. Embora avaliações de riscos de contaminação ambiental de agrotóxicos sejam obrigatórios para o registro e comercialização, frequentemente estudos relatam a presença destes em locais não alvos, sendo os corpos de água os principais prejudicados. Vários processos biológicos, físicos e químicos determinam o destino ambiental e a eficiência desses. Assim, diversos métodos experimentais podem ser utilizados para avaliar o comportamento de agrotóxicos no ambiente. Essa revisão objetiva resumir os métodos mais comumente utilizados para descrever Schreiber et al.Rev. Bras. Herb., v.17, n

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“…absorbing capacity, granulometric composition, cultivation measures). On the basis of studies concerning the translocation of herbicide active ingredients Helling & Turner (1968) determined the relative mobility index of herbicides (R f ), dividing them into five classes. In another study showed that chlorsulfuron (ALS group) was capable of penetrating to a depth of 50 cm 63 days after application, despite the fact that a bigger part of its residue was detected in a layer up to 25 cm deep.…”

Section: The Behavior Of Herbicides In the Soil Environmentmentioning

confidence: 99%

Application of Bioassays in Studies on Phytotoxic Herbicide Residues in the Soil Environment

Sekutowski¹

2011

Herbicides and Environment

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Pesticide Mobility: Determination by Soil Thin-Layer Chromatography

Cited by 189 publications

References 16 publications

Sorption, degradation and mobility of microcystins in Chinese agriculture soils: risk assessment for groundwater protection

Sorption, degradation and mobility of microcystins in Chinese agriculture soils: risk assessment for groundwater protection

Experimental methods to evaluate herbicides behavior in soil

Application of Bioassays in Studies on Phytotoxic Herbicide Residues in the Soil Environment

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