Adsorption of disulfoton by soil

Graham‐Bryce, I. J.

doi:10.1002/jsfa.2740180208

Cited by 31 publications

(6 citation statements)

References 22 publications

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“…The adsorption of disulfoton on various soils was correlated with organic matter content and pH (Graham-Bryce 1967). Moisture also affected disulfoton adsorption; if desorption experiments were performed while the soil was still wet, adsorption appeared completely reversible.…”

Section: +mentioning

confidence: 99%

Sorption of organophosphorus and carbamate insecticides by soil

Felsot¹,

Dahm²

1979

J. Agric. Food Chem.

133

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Section: +mentioning

confidence: 99%

Sorption of organophosphorus and carbamate insecticides by soil

Felsot¹,

Dahm²

1979

J. Agric. Food Chem.

133

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“…As with most soil-applied pesticides (2,4,6,8,15,23), adequate soil moisture is required for satisfactory ethofumesate activity. Hartley (11), using wall barley (Hordeum murinum L.) as an indicator species, found that the activity of ethofumesate decreased as the soil moisture at the time of application decreased from 50 to 10% (w/w).…”

Section: Introductionmentioning

confidence: 99%

Effect of a Pre-Irrigation Period on the Activity of Ethofumesate Applied to Dry Soil

McAuliffe¹

1981

Weed sci.

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Applications of ethofumesate [(±)-2-ethoxy-2,3-dihydro-3,3-dimethyl-5-benzofuranyl methanesulfonate] at rates from 0.3 to 1.4 kg/ha were made in the field to soils of 2 and 30% (w/w) soil moisture. After 2 to 4 days, all soils were irrigated to establish stands of either sweet corn (Zea maysL. ‘Jubilee’) or winter wheat (Triticum aestivumL. ‘Stephens’) used as bioassay species for ethofumesate activity. Ethofumesate, at most rates, was significantly less effective on both corn and wheat when applied to dry soil than to wet soil. In greenhouse studies, ethofumesate activity was significantly greater when incorporated into soil of 12% than 2% (w/w) moisture 2 or 4 days prior to irrigation. An increase in herbicide activity was apparent as the length of time between herbicide application and wetting increased from 2 to 4 days. Analysis of wet (20%, w/w) and dry (2%, w/w) soils treated with equal levels of ethofumesate revealed no loss of herbicide applied to wet soil over a 12-day period, but in the dry soil, the amount extracted after 12 days was 10% of the amount extracted at 0 days. These data and other considerations suggest that chemical degradation of ethofumesate is the most likely mechanism for the activity loss in dry soil.

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“…centration with time is degradation. Substantial degradation of other compounds can occur in the relatively short times (<4 days) in which adsorption-desorption experiments are conducted (6,13,15). Although negligible amounts of 14 C0 2 and DCPU were found for either soil up to the 72-h equilibration, substantial amounts of DCPMU were found in the Palouse soil-solution extract ( Figure 3); up to 19% of methazole initially added had degraded to DCPMU within 72 h. No emphasis should be placed on the effect of initial concentration on the rate of degradation.…”

Section: Resultsmentioning

confidence: 99%

Methazole Adsorption-Desorption in Soil

Koskinen¹

1984

Weed sci.

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Adsorption and desorption of14C-methazole [2-(3,4-dichlorophenyl)-4-methyl-1,2,4-oxadiazolidine-3,5-dione] were characterized on two silt loam soils (Dundee and Palouse; 0.7 and 3.0% organic matter, respectively) using the batch equilibration technique. Freundlich adsorption isotherm coefficients (Kfand l/n) were calculated after equilibration of methazole solutions (initial concentrations = 0.11 to 4.10 nmol/ml) with soil for various times. After a rapid attainment of an apparent equilibrium,14C- concentration in solution for the Palouse soil decreased at a low rate. The greater adsorption (Kf) on the Palouse soil, for a given equilibration period, was attributed to the greater organic matter content. The continued trend of increase in apparent Kfwith time was due to degradation of methazole in solution to 3-(3,4-dichlorophenyl)-1-methylurea (DCPMU), which was highly adsorbed, rather than to increased adsorption of the parent compound. The calculated adsorption coefficients expressed in terms of soil organic carbon would classify methazole and DCPMU as immobile in Palouse soil and methazole as slightly mobile in Dundee soil. Calculated desorption isotherms, which exhibited a hysteretic effect, were also dependent on the rate of methazole degradation. The adsorption, desorption, and degradation data indicate that methazole would not leach readily in most soils.

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Adsorption of disulfoton by soil

Cited by 31 publications

References 22 publications

Sorption of organophosphorus and carbamate insecticides by soil

Sorption of organophosphorus and carbamate insecticides by soil

Effect of a Pre-Irrigation Period on the Activity of Ethofumesate Applied to Dry Soil

Methazole Adsorption-Desorption in Soil

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