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Javier M Montserrat - One of the best experts on this subject based on the ideXlab platform.

  • environmental fate of trifluralin procymidone and chlorpyrifos in small Horticultural Production units in argentina
    Water Air and Soil Pollution, 2014
    Co-Authors: Giselle A Querejeta, Enrique A Hughes, Anita Zalts, Javier M Montserrat, Laura M Ramos, Diana L Vullo
    Abstract:

    Pesticide biodegradation was studied in soil samples of a representative small periurban Production unit (Moreno District, Argentina). The mean periods required for the 50 % dissipation of chlorpyrifos (16 days ± 1 day), procymidone (3.7 days ± 0.6 day), and trifluralin (3.6 days ± 0.6 day) were significantly lower than those measured for reference soil samples of a close location, using doses similar to the manufacturer’s recommendation. A preliminary screening scheme for pesticide-degrading bacteria on Horticultural soil allowed the isolation of nine culturable bacterial strains, eight of which belonged to Pseudomonas genus. In order to consider the influence of the variability of soil properties on the biodegradation results, humidity, organic matter, conductivity, pH, water retention volume, density, respiration, and total phosphorous content were studied for different soil samples, finding no significant differences in the performed analysis. Overall, although the Horticultural activity alters the natural soil, pesticide contamination effects could be reversed by the autochthonous microbial community.

  • analytical method for assessing potential dermal exposure to captan using whole body dosimetry in small vegetable Production units in argentina
    Pest Management Science, 2006
    Co-Authors: Enrique A Hughes, Andrea P Flores, Anita Zalts, Javier Ojeda, Richard Glass, Javier M Montserrat
    Abstract:

    An analytical method has been developed that can be used to determine the potential dermal exposure (PDE) of workers to the pesticide captan in small-scale Horticultural Production units. The methodology is based on the whole body dosimetry technique, using a cotton coverall and cotton gloves as sampling media, with protective clothing worn beneath the cotton media to protect the operator. The quantitative determination of captan was done by gas chromatography-electron capture detector (GC-ECD), with the analytical method validated by measuring limits of detection and quantification, linear ranges, sample recovery and precision. Special emphasis is placed on factors that affected the stability of captan during chromatographic determination. The data generated for potential dermal exposure are presented separately for mixing/loading and application activities. These data are compared with values obtained with visible tracers using a similar field technique. Margin of safety (MOS) values are also calculated for the agricultural procedures studied. Copyright © 2006 Society of Chemical Industry

  • analytical method for assessing potential dermal exposure to captan using whole body dosimetry in small vegetable Production units in argentina
    Pest Management Science, 2006
    Co-Authors: Enrique A Hughes, Andrea P Flores, Anita Zalts, Javier Ojeda, Richard Glass, Javier M Montserrat
    Abstract:

    An analytical method has been developed that can be used to determine the potential dermal exposure (PDE) of workers to the pesticide captan in small-scale Horticultural Production units. The methodology is based on the whole body dosimetry technique, using a cotton coverall and cotton gloves as sampling media, with protective clothing worn beneath the cotton media to protect the operator. The quantitative determination of captan was done by gas chromatography-electron capture detector (GC-ECD), with the analytical method validated by measuring limits of detection and quantification, linear ranges, sample recovery and precision. Special emphasis is placed on factors that affected the stability of captan during chromatographic determination. The data generated for potential dermal exposure are presented separately for mixing/loading and application activities. These data are compared with values obtained with visible tracers using a similar field technique. Margin of safety (MOS) values are also calculated for the agricultural procedures studied.

Enrique A Hughes - One of the best experts on this subject based on the ideXlab platform.

  • environmental fate of trifluralin procymidone and chlorpyrifos in small Horticultural Production units in argentina
    Water Air and Soil Pollution, 2014
    Co-Authors: Giselle A Querejeta, Enrique A Hughes, Anita Zalts, Javier M Montserrat, Laura M Ramos, Diana L Vullo
    Abstract:

    Pesticide biodegradation was studied in soil samples of a representative small periurban Production unit (Moreno District, Argentina). The mean periods required for the 50 % dissipation of chlorpyrifos (16 days ± 1 day), procymidone (3.7 days ± 0.6 day), and trifluralin (3.6 days ± 0.6 day) were significantly lower than those measured for reference soil samples of a close location, using doses similar to the manufacturer’s recommendation. A preliminary screening scheme for pesticide-degrading bacteria on Horticultural soil allowed the isolation of nine culturable bacterial strains, eight of which belonged to Pseudomonas genus. In order to consider the influence of the variability of soil properties on the biodegradation results, humidity, organic matter, conductivity, pH, water retention volume, density, respiration, and total phosphorous content were studied for different soil samples, finding no significant differences in the performed analysis. Overall, although the Horticultural activity alters the natural soil, pesticide contamination effects could be reversed by the autochthonous microbial community.

  • analytical method for assessing potential dermal exposure to captan using whole body dosimetry in small vegetable Production units in argentina
    Pest Management Science, 2006
    Co-Authors: Enrique A Hughes, Andrea P Flores, Anita Zalts, Javier Ojeda, Richard Glass, Javier M Montserrat
    Abstract:

    An analytical method has been developed that can be used to determine the potential dermal exposure (PDE) of workers to the pesticide captan in small-scale Horticultural Production units. The methodology is based on the whole body dosimetry technique, using a cotton coverall and cotton gloves as sampling media, with protective clothing worn beneath the cotton media to protect the operator. The quantitative determination of captan was done by gas chromatography-electron capture detector (GC-ECD), with the analytical method validated by measuring limits of detection and quantification, linear ranges, sample recovery and precision. Special emphasis is placed on factors that affected the stability of captan during chromatographic determination. The data generated for potential dermal exposure are presented separately for mixing/loading and application activities. These data are compared with values obtained with visible tracers using a similar field technique. Margin of safety (MOS) values are also calculated for the agricultural procedures studied. Copyright © 2006 Society of Chemical Industry

  • analytical method for assessing potential dermal exposure to captan using whole body dosimetry in small vegetable Production units in argentina
    Pest Management Science, 2006
    Co-Authors: Enrique A Hughes, Andrea P Flores, Anita Zalts, Javier Ojeda, Richard Glass, Javier M Montserrat
    Abstract:

    An analytical method has been developed that can be used to determine the potential dermal exposure (PDE) of workers to the pesticide captan in small-scale Horticultural Production units. The methodology is based on the whole body dosimetry technique, using a cotton coverall and cotton gloves as sampling media, with protective clothing worn beneath the cotton media to protect the operator. The quantitative determination of captan was done by gas chromatography-electron capture detector (GC-ECD), with the analytical method validated by measuring limits of detection and quantification, linear ranges, sample recovery and precision. Special emphasis is placed on factors that affected the stability of captan during chromatographic determination. The data generated for potential dermal exposure are presented separately for mixing/loading and application activities. These data are compared with values obtained with visible tracers using a similar field technique. Margin of safety (MOS) values are also calculated for the agricultural procedures studied.

Nick C. Toscano - One of the best experts on this subject based on the ideXlab platform.

  • resistance status of the carmine spider mite tetranychus cinnabarinus and the twospotted spider mite tetranychus urticae to selected acaricides on strawberries
    Insect Science, 2016
    Co-Authors: Jianlong Bi, Lu Yu, Nick C. Toscano
    Abstract:

    The carmine spider mite, Tetranychus cinnabarinus (Boisduval) and the twospotted spider mite, Tetranychus urticae Koch, are serious pests of strawberries and many other Horticultural crops. Control of these pests has been heavily dependent upon chemical acaricides. Objectives of this study were to determine the resistance status of these two pest species to commonly used acaricides on strawberries in a year-round intensive Horticultural Production region. LC90 of abamectin for adult carmine spider mites was 4% whereas that for adult twospotted spider mites was 24% of the top label rate. LC90s of spiromesifen, etoxazole, hexythiazox and bifenazate were 0.5%, 0.5%, 1.4% and 83% of their respective highest label rates for carmine spider mite eggs, 0.7%, 2.7%, 12.1% and 347% of their respective highest label rates for the nymphs. LC90s of spiromesifen, etoxazole, hexythiazox and bifenazate were 4.6%, 11.1%, 310% and 62% of their respective highest label rates for twospotted spider mite eggs, 3%, 13%, 432,214% and 15% of their respective highest label rates for the nymphs. Our results suggest that T. cinnabarinus have developed resistance to bifenazate and that the T. urticae have developed resistance to hexythiazox. These results strongly emphasize the need to develop resistance management strategies in the region.

  • current status of the greenhouse whitefly trialeurodes vaporariorum susceptibility to neonicotinoid and conventional insecticides on strawberries in southern california
    Pest Management Science, 2007
    Co-Authors: Nick C. Toscano
    Abstract:

    Since 1998, the greenhouse whitefly, Trialeurodes vaporariorum Westwood (Homoptera: Aleyrodidae), has emerged as a major insect pest of many Horticultural crops in coastal California. Control of this pest has been heavily dependent upon chemical insecticides. Objectives of this study were to determine the status of the greenhouse whitefly susceptibility to neonicotinoid and conventional insecticides on strawberries in Oxnard/Ventura, a year-round intensive Horticultural Production area of southern California. For bioassay tests, adult whiteflies were collected from commercial strawberry crops, and immatures were directly developed from eggs laid by these adults. LD(50) values of soil-applied imidacloprid, thiamethoxam and dinotefuran were respectively 8.7, 3.2 and 4.9 times higher for the adults, 1.8, 1.2 and 1.5 times higher for the first-instar nymphs and 89.4, 390 and 10.4 times higher for the third-instar nymphs than their top label rates. LC(50) values of foliar-applied imidacloprid, thiamethoxam and acetamiprid were respectively 6.1, 6.0 and 1.7 times higher for the adults and 3.8, 8.7 and 4.4 times higher for the second-instar nymphs than their top label rates. For the adults, LC(90) values of endosulfan, malathion, methomyl, bifenthrin and fenpropathrin were 2.2, 1.2, 1.9, 2.3 and 4.9 times lower than their respective top label rates. Chlorpyrifos was not very effective against the adults, as indicated by its LC(90) being 120% higher than its top label rate. The present results strongly emphasize the need to develop resistance management strategies in the region.

Anita Zalts - One of the best experts on this subject based on the ideXlab platform.

  • environmental fate of trifluralin procymidone and chlorpyrifos in small Horticultural Production units in argentina
    Water Air and Soil Pollution, 2014
    Co-Authors: Giselle A Querejeta, Enrique A Hughes, Anita Zalts, Javier M Montserrat, Laura M Ramos, Diana L Vullo
    Abstract:

    Pesticide biodegradation was studied in soil samples of a representative small periurban Production unit (Moreno District, Argentina). The mean periods required for the 50 % dissipation of chlorpyrifos (16 days ± 1 day), procymidone (3.7 days ± 0.6 day), and trifluralin (3.6 days ± 0.6 day) were significantly lower than those measured for reference soil samples of a close location, using doses similar to the manufacturer’s recommendation. A preliminary screening scheme for pesticide-degrading bacteria on Horticultural soil allowed the isolation of nine culturable bacterial strains, eight of which belonged to Pseudomonas genus. In order to consider the influence of the variability of soil properties on the biodegradation results, humidity, organic matter, conductivity, pH, water retention volume, density, respiration, and total phosphorous content were studied for different soil samples, finding no significant differences in the performed analysis. Overall, although the Horticultural activity alters the natural soil, pesticide contamination effects could be reversed by the autochthonous microbial community.

  • analytical method for assessing potential dermal exposure to captan using whole body dosimetry in small vegetable Production units in argentina
    Pest Management Science, 2006
    Co-Authors: Enrique A Hughes, Andrea P Flores, Anita Zalts, Javier Ojeda, Richard Glass, Javier M Montserrat
    Abstract:

    An analytical method has been developed that can be used to determine the potential dermal exposure (PDE) of workers to the pesticide captan in small-scale Horticultural Production units. The methodology is based on the whole body dosimetry technique, using a cotton coverall and cotton gloves as sampling media, with protective clothing worn beneath the cotton media to protect the operator. The quantitative determination of captan was done by gas chromatography-electron capture detector (GC-ECD), with the analytical method validated by measuring limits of detection and quantification, linear ranges, sample recovery and precision. Special emphasis is placed on factors that affected the stability of captan during chromatographic determination. The data generated for potential dermal exposure are presented separately for mixing/loading and application activities. These data are compared with values obtained with visible tracers using a similar field technique. Margin of safety (MOS) values are also calculated for the agricultural procedures studied. Copyright © 2006 Society of Chemical Industry

  • analytical method for assessing potential dermal exposure to captan using whole body dosimetry in small vegetable Production units in argentina
    Pest Management Science, 2006
    Co-Authors: Enrique A Hughes, Andrea P Flores, Anita Zalts, Javier Ojeda, Richard Glass, Javier M Montserrat
    Abstract:

    An analytical method has been developed that can be used to determine the potential dermal exposure (PDE) of workers to the pesticide captan in small-scale Horticultural Production units. The methodology is based on the whole body dosimetry technique, using a cotton coverall and cotton gloves as sampling media, with protective clothing worn beneath the cotton media to protect the operator. The quantitative determination of captan was done by gas chromatography-electron capture detector (GC-ECD), with the analytical method validated by measuring limits of detection and quantification, linear ranges, sample recovery and precision. Special emphasis is placed on factors that affected the stability of captan during chromatographic determination. The data generated for potential dermal exposure are presented separately for mixing/loading and application activities. These data are compared with values obtained with visible tracers using a similar field technique. Margin of safety (MOS) values are also calculated for the agricultural procedures studied.

Richard Glass - One of the best experts on this subject based on the ideXlab platform.

  • analytical method for assessing potential dermal exposure to captan using whole body dosimetry in small vegetable Production units in argentina
    Pest Management Science, 2006
    Co-Authors: Enrique A Hughes, Andrea P Flores, Anita Zalts, Javier Ojeda, Richard Glass, Javier M Montserrat
    Abstract:

    An analytical method has been developed that can be used to determine the potential dermal exposure (PDE) of workers to the pesticide captan in small-scale Horticultural Production units. The methodology is based on the whole body dosimetry technique, using a cotton coverall and cotton gloves as sampling media, with protective clothing worn beneath the cotton media to protect the operator. The quantitative determination of captan was done by gas chromatography-electron capture detector (GC-ECD), with the analytical method validated by measuring limits of detection and quantification, linear ranges, sample recovery and precision. Special emphasis is placed on factors that affected the stability of captan during chromatographic determination. The data generated for potential dermal exposure are presented separately for mixing/loading and application activities. These data are compared with values obtained with visible tracers using a similar field technique. Margin of safety (MOS) values are also calculated for the agricultural procedures studied. Copyright © 2006 Society of Chemical Industry

  • analytical method for assessing potential dermal exposure to captan using whole body dosimetry in small vegetable Production units in argentina
    Pest Management Science, 2006
    Co-Authors: Enrique A Hughes, Andrea P Flores, Anita Zalts, Javier Ojeda, Richard Glass, Javier M Montserrat
    Abstract:

    An analytical method has been developed that can be used to determine the potential dermal exposure (PDE) of workers to the pesticide captan in small-scale Horticultural Production units. The methodology is based on the whole body dosimetry technique, using a cotton coverall and cotton gloves as sampling media, with protective clothing worn beneath the cotton media to protect the operator. The quantitative determination of captan was done by gas chromatography-electron capture detector (GC-ECD), with the analytical method validated by measuring limits of detection and quantification, linear ranges, sample recovery and precision. Special emphasis is placed on factors that affected the stability of captan during chromatographic determination. The data generated for potential dermal exposure are presented separately for mixing/loading and application activities. These data are compared with values obtained with visible tracers using a similar field technique. Margin of safety (MOS) values are also calculated for the agricultural procedures studied.