Experimental Approach for Pesticide Mobility Studies in the Unsaturated Zone

Hernández, Félix; Beltrán, J.; Forcada, M.; López, Francisco J.; Morell, Ignacio

doi:10.1080/03067319808032619

Cited by 13 publications

(10 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The herbicide did not leach because of adsorption, although the field plots were fully irrigated and received 24.4 cm of precipitation during a 12‐month period. Different and opposite results were reported by Hernandez et al. (1998) who recently developed an experimental approach for pesticide mobility studies in the soil environment.…”

Section: Introductionmentioning

confidence: 64%

Retention and degradation of metribuzin in sandy loam and clay soils of Lebanon

et al. 2003

View full text Add to dashboard Cite

Summary The retention and degradation of metribuzin herbicide were studied under two environmental conditions. Field studies were carried out on two soils, a sandy loam soil (soil A) and a clay soil (soil B). Metribuzin was applied with a jet sprayer at 1060 g a.i. ha−1 and 1960 g a.i. ha−1 on soils A and B respectively. Reconstituted soil columns were used to study the herbicide movement and metabolism in the two soils. Analyses of metribuzin and its metabolites were carried out using standardized methods. The results indicated a very weak capacity of adsorption of metribuzin in the two soils, and the weak adsorbed fraction is easily desorbed. Degradation and mobility of metribuzin in the field and laboratory soil columns were very intense and rapid. Soil A favoured reductive deamination whereas soil B favoured oxidative desulphuration and the respective metabolites deaminometribuzin and diketometribuzin yield the same product deaminodiketometribuzin. Both leaching by rainfall and degradation were important in the disappearance of metribuzin from the soils.

show abstract

Section: Introductionmentioning

confidence: 64%

Retention and degradation of metribuzin in sandy loam and clay soils of Lebanon

et al. 2003

View full text Add to dashboard Cite

show abstract

“…However, in many cases the behavior of several pesticides in soil is rather controversial. For instance, Hyzak and Zimdahl (1974) showed that most of the herbicide residues were found in the upper 5 cm of the profile, while in another study; Hernandez et al (1998) proved that metribuzin can be very mobile in soil. According to Mosleh et al (2003), even if the importance of earthworms in ecotoxicological studies is well recognized, there is still a need for further data on the toxicity of specific pesticides to such non-target organisms.…”

Section: Resultsmentioning

confidence: 99%

Effects of the herbicides benfluralin, metribuzin and propyzamide on the survival and weight of earthworms (Octodrilus complanatus)

Travlos¹,

Gkotsi²,

Roussis³

et al. 2017

PLANT SOIL ENVIRON

View full text Add to dashboard Cite

Extended pesticide use might be of high risk for several non-target organisms like earthworms. Herbicides represent a major part of the total pesticides used; however, their effects on soil organisms have been only partially studied. The effects of the herbicides benfluralin, metribuzin and propyzamide at different rates on the survival and weight of earthworms (Octodrilus complanatus) were determined and compared in this study. Our results revealed significant effects of benfluralin, metribuzin and propyzamide on growth and survival of earthworms. Moreover, there was a significant effect of herbicide rate and time after treatment. For several herbicides, the highest weight reduction was obtained for double the recommended rate and was up to 70% compared to the untreated soil. This study highlights the importance of not exceeding the recommended rates of herbicides, while further studies in a range of conditions are certainly required.

show abstract

“…The intense and frequent use of these chemicals has led to the persistence in soil due to lack of their timely degradation (Odukkathil and Vasudevan 2013). For example; metribuzin was in practice because of its easy transfer as a water soluble compound (Hernandez et al 1998), and linuron for its persistence in the soil (Guzzella et al 2006), and fluazinam due to its persistence and wide taxonomic range to inhibit phytopathogenic fungi (Kimyoji et al 1995). Metribuzin (4-amino-6-tert-butyl-4,5-dihydro-3-methylthio-1,2,4-triazin-5-one) and linuron (3-(3,4-dichlorophenyl)-1-methoxy-1-methylurea) inhibit electron transport at the photosystem II receptor site, were used to control weeds in several crops, including potato (Tomlin 2002).…”

Section: Pesticide Relevance and Problemmentioning

confidence: 99%