Insecticide Residue in Soil, Potatoes, Carrots, Beets, Rutabagas, Wheat Plants and Grain Following Treatment of the Soil With Dyfonate

Saha, J. G.; Burrage, R. H.; Lee, Y. W.; Saha, Mihir Lal; Sumner, A. K.

doi:10.4141/cjps74-121

Cited by 5 publications

(2 citation statements)

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“…The insecticide is known to be persistent in mineral soils and its residue is absorbed by some crops grown in treated ~0il. [1][2][3][4] The insecticide is degraded in soil to form the oxygen analogue, 0-ethyl S-phenyl ethylphosphonothioate (I).5-7 During recent years fonofos has been used to control agricultural insect pests in organic soils. These soils occur widely and are of great economic value to vegetable crops and turf production.…”

Section: Introductionmentioning

confidence: 99%

Fonofos residues in an organic soil and vegetable crops following treatment of the soil with the insecticide

1976

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Fonofos (0-ethyl S-phenyl ethylphosphonodithioate) was applied to an organic soil as band treatment at the rates of 1.12 and 2.24 kg/ha. The persistence of the insecticide and its translocation into onions and two rotation crops (lettuces and carrots) was studied under field conditions. Proportionally more residues persisted in the soil from the higher rate of application. In autumn, 4 months after soil treatment, about 40-48 % of the initially recovered levels of fonofos remained in soil. However, the amount of fonofos present at the harvest time, during the second growing season was only 16-26 % of the insecticide concentration found in spring. Onions harvested 4 months after application of fonofos had no detectable residue (> 0.005 mg/kg) whereas lettuces and carrots grown in the following year contained fonofos in various amounts. At the lower rate of application the insecticide residues in lettuces and carrots were <0.005 and 0.025 mg/kg, respectively, and those from the higher application rate were 0.012 and 0.036 mg/kg. About 7240% of the residue could be removed by peeling the carrots. No residue of the oxygen analogue, 0-ethyl S-phenyl ethylphosphonothioate (I) was detected in any soil or crop samples.

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Section: Introductionmentioning

confidence: 99%

Fonofos residues in an organic soil and vegetable crops following treatment of the soil with the insecticide

1976

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“…(1973) (Grice et contaminated soil (Onsager and Rush 1969;al. 1973 Saha et al (1974) (Khan 1971 By plotting logatpg/g) against log C tppm).…”

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Adsorption of Dyfonate (O-Ethyl-S-Phenyl Ethylphosphonodithioate) on Humic Acid

Khan¹

1977

Can. J. Soil. Sci.

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The adsorption of Dyfonate (O-ethyl-S-phenyl ethylphosphonodithioate) was studied on humic acid (HA) saturated with various cations (Fe3+, Al3+, Cu2+, Zn2+, Co2+, Mn2+, Ni2+, Ca2+, Mg2+, and H+). The amount of Dyfonate adsorbed was affected by the cation with which the HA was saturated. The adsorption process could be described empirically by a Freundlich-type isotherm. The K and [Formula: see text] constants of the Freundlich equation decreased and increased, respectively, with increase in temperature. The data suggest a physical type of adsorption.

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Persistence and degradation of PP993 pyrethroid, fonofos, and chlorpyrifos in a Quebec cornfield's soil

Elhag

Yule

Marshall

1989

Bull. Environ. Contam. Toxicol.

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Insecticide Residue in Soil, Potatoes, Carrots, Beets, Rutabagas, Wheat Plants and Grain Following Treatment of the Soil With Dyfonate

Cited by 5 publications

References 1 publication

Fonofos residues in an organic soil and vegetable crops following treatment of the soil with the insecticide

Fonofos residues in an organic soil and vegetable crops following treatment of the soil with the insecticide

Adsorption of Dyfonate (O-Ethyl-S-Phenyl Ethylphosphonodithioate) on Humic Acid

Persistence and degradation of PP993 pyrethroid, fonofos, and chlorpyrifos in a Quebec cornfield's soil

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