Mobility and Dissipation of Ethofumesate and Halofenozide in Turfgrass and Bare Soil

Gardner, David; Branham, B. E.

doi:10.1021/jf001273g

Cited by 16 publications

(14 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the case of halofenozide, Tomlin (2003) gives a half‐life of 3 to 77 d for turf. This suggests that the value of 64 d found by Gardner and Branham (2001a) may be close to the upper limit for turf half‐life and may have resulted from particular conditions occurring during the experiment (the authors mention that rainfall occurred shortly after application which moved the pesticide rapidly into the soil).…”

Section: Pesticide Dissipation Half‐lives For Turfmentioning

confidence: 66%

“…First, turf foliage and thatch provide an environment that can sustain highly active microbial populations (Branham et al, 1993; Cole and Turgeon, 1978; Gardner and Branham, 2001a; Gardner et al, 2000; Horst et al, 1996). Raturi et al (2004) found that total microbial biomass carbon was, on average, 10 times greater in thatch than in the underlying soil.…”

Section: Pesticide Dissipation Processes In Turfmentioning

confidence: 99%

See 1 more Smart Citation

Pesticide Decay in Turf: A Review of Processes and Experimental Data

Magri

Haith

2009

J of Env Quality

View full text Add to dashboard Cite

Decay rates are central parameters in modeling pesticide fate and transport in the environment. Pesticide decay is usually modeled as a first-order process, and variations in half-life can have significant impacts on model predictions. Decay rates for the foliage and thatch components of turf are scarce, and most simulation efforts must resort to values based on pesticide behavior in soil. This paper describes the main dissipation processes affecting pesticides applied to turf and compares aerobic soil decay rates from the USDA-Agricultural Research Service Pesticide Properties Database (ARS PPD; USDA-ARS, 2006) and from The Pesticide Manual (Tomlin, 2003) to dissipation values in turf found in the literature for 18 pesticides currently registered for turf. Median half-lives were 39.5 d for the ARS values, 35.8 d for Tomlin's values, and 5.7 d for the turf-specific values. The turf dissipation half-lives are considered to be representative of the microbial decay processes occurring in the foliage and thatch layers of well established turf, where the majority of the pesticide is intercepted and retained.

show abstract

Section: Pesticide Dissipation Half‐lives For Turfmentioning

confidence: 66%

Section: Pesticide Dissipation Processes In Turfmentioning

confidence: 99%

Pesticide Decay in Turf: A Review of Processes and Experimental Data

Magri

Haith

2009

J of Env Quality

View full text Add to dashboard Cite

show abstract

“…Morrica et al (2001) describes the kinetics of the chemical hydrolusis of imazosulfuron and evaluate the results to propose a degradation pathway. The mobility and dissipation of ethofumesate and halofenozide was studied in soils with and without turfgrass cover (Gardner and Branham, 2001). Ethofumesate leaching was reduced by 95% in the vegetated soil as compared to the bare soil.…”

Section: Fate and Transportmentioning

confidence: 99%

Pesticides and Herbicides

Hutchinson¹,

Bhandari²,

Starrett³

2002

Water Environment Research

View full text Add to dashboard Cite

This review summarizes the most current technical literature dealing with pesticides and herbicides in the environment. Citations included in this review focus primarily on analytical methods, monitoring, fate and transport, transformation, and treatment strategies as related to pesticides and herbicides in soils, sediments, surface water, and groundwater. (2001) describe methods for the extraction of bentazone, dichlorprop, and MCPA from soils of different texture. All methods gave recoveries of greater than 80%. Caldas et al. (2001) propose a new reaction system for the purification and complexation of CS 2 for the determination of dithiocarbamate fungicide residues in food. Vetter et al. (2001) determined the structure of a persistent heptachlorobornane in toxaphene, B7-1000. This structure validates pervious predictions of persistence based on structure-activity relationships, chromatographic properties, and molecular modeling. A semiautomatic multiresidue method based on solid-phase extraction with a silica column was used to determine pesticide residue in lyophilized fruits (Colume et al., 2001). Numerous researchers used liquid chromatographic techniques to analyze for pesticides in various media. Phenyl urea herbicides were determined in water by electrospray quadrupole ion trap liquid chromatography-mass spectrometry (Draper, 2001). Detection limits were established between 8.0 and 36 ng L -1 . Bicchi et al. (2001) reports on an HPLC-UV method for determining daminozide residues in apple pulp. Debrauwer et al. (2001) identified the major metabolites of prochloraz in rainbow trout using liquid chromatography and tandem mass spectrometry. Through this analysis it was determined that trout are able to biotransform prochoraz primarily as glucuronide conjugates. Kontou et al. (2001) developed an HPLC-PDA method for the determination of ethylenethiourea, the main degradation product of the organic Literature Review 2002 ANALYTICAL METHODS Thorstensen and Christiansen

show abstract

“…In bermudagrass and fallow systems, organic matter (OM) can bind pesticides (Weber and Keller, 1994; Gardner and Branham, 2001). Although OM accounts for only a small portion of soil, it has a large effect on both its biological and chemical properties.…”

mentioning

confidence: 99%

“…As a bermudagrass turf system ages, the thatch layer at the surface of the bermudagrass system thickens, and the lower portion of the thatch layer and soil below increase in OM content. In addition, the thatch layer in a turf system contains diverse populations of microorganisms that can degrade pesticides and can utilize root exudates and regular applications of fertilizer and irrigation for growth and metabolism (Gardner and Branham, 2001). In a fallow row crop system, however, OM is distributed uniformly in the plow layer (0–15 cm).…”

mentioning

confidence: 99%

Downward Mobility of ¹⁴C‐Labeled Simazine in a Bermudagrass System vs. a Fallow Soil System

et al. 2009

View full text Add to dashboard Cite

Pesticides applied to bermudagrass (Cynodon dactylon L.) can be captured by the canopy, absorbed by the roots, or bound in the thatch layer, which reduces the amount available to leach compared with a fallow soil system where pesticides may be applied directly to soil. 14C‐Simazine was applied to dormant bermudagrass and fallow soil in lysimeters in a cold growth chamber (5°C) (cold‐fallow soil) and to actively growing bermudagrass and fallow soil in lysimeters in a greenhouse (25°C) (warm‐fallow soil) in April. Following clipping collection, lysimeters were irrigated with 5 cm of water every 3–4 d, and leachate was collected. After 25 d, lysimeters were divided into 2‐cm increments from 0 to 10 cm, then 5‐cm increments from 10 to 30 cm. Because of evapotranspiration, actively growing bermudagrass and warm‐fallow soil yielded significantly less leachate than dormant bermudagrass and cold‐fallow soil indicating less moisture is available for downward movement during summer. After the addition of 31 cm of irrigation, the greatest quantities of 14C‐simazine were in the 0‐ to 2‐cm increment for all treatments and decreased with depth. Although the greatest quantities of 14C‐simazine in leachate occurred in dormant bermudagrass, the reached factor was greatest for cold‐fallow soil (0.20), followed by dormant bermudagrass (0.17), warm‐fallow soil (0.16), and actively growing bermudagrass (0.14). Therefore, simazine is least mobile in bermudagrass during summer and most mobile in fallow soil in winter.

show abstract

Mobility and Dissipation of Ethofumesate and Halofenozide in Turfgrass and Bare Soil

Cited by 16 publications

References 23 publications

Pesticide Decay in Turf: A Review of Processes and Experimental Data

Pesticide Decay in Turf: A Review of Processes and Experimental Data

Pesticides and Herbicides

Downward Mobility of ¹⁴C‐Labeled Simazine in a Bermudagrass System vs. a Fallow Soil System

Contact Info

Product

Resources

About

Mobility and Dissipation of Ethofumesate and Halofenozide in Turfgrass and Bare Soil

Cited by 16 publications

References 23 publications

Pesticide Decay in Turf: A Review of Processes and Experimental Data

Pesticide Decay in Turf: A Review of Processes and Experimental Data

Pesticides and Herbicides

Downward Mobility of 14C‐Labeled Simazine in a Bermudagrass System vs. a Fallow Soil System

Contact Info

Product

Resources

About

Downward Mobility of ¹⁴C‐Labeled Simazine in a Bermudagrass System vs. a Fallow Soil System