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Permeation of soil fumigants through agricultural plastic films
Year:
2006
Source of publication :
Phytoparasitica
Authors :
Gamliel, Abraham
;
.
Osterweil, Miriam
;
.
Steiner, Bracha
;
.
Volume :
34
Co-Authors:
Austerweil, M., Laboratory for Research on Pest Management Application, Inst. of Agricultural Engineering, Volcani Center, Bet Dagan 50250, Israel
Steiner, B., Laboratory for Research on Pest Management Application, Inst. of Agricultural Engineering, Volcani Center, Bet Dagan 50250, Israel
Gamliel, A., Laboratory for Research on Pest Management Application, Inst. of Agricultural Engineering, Volcani Center, Bet Dagan 50250, Israel
Facilitators :
From page:
491
To page:
501
(
Total pages:
11
)
Abstract:
Plastic films are used in soil fumigation to control fumigant emission into the atmosphere. In previous studies it was shown that the plastic films are permeable to fumigant vapors. Virtually impermeable films (VIF) have been developed to reduce such emission and to increase the efficacy of pest control. A rapid, accurate, sensitive and simple method to measure the permeability of plastic films to soil fumigants that was developed in the present study is described in this paper. The method uses a static, closed system in which the tested film is fixed between two cells. The fumigant is sampled by a solid-phase microextraction method and measured quantitatively by gas chromatography. The method was used to assess the permeability of two plastic films - a low-density polyethylene film (LDPE) and a VIF - to commercial soil fumigants formulated individually or in mixtures. All the tested fumigants permeated through the commonly used LDPE film, in the following descending order of permeability: methyl isothiocyanate (MITC), methyl bromide (MBr), 1,3-dichloropropene (1,3-D; Telone), chloropicrin (CP). The VIF was impermeable to all the tested fumigants except MITC, the permeation of which was reduced by 40%. The permeation of some fumigants through LDPE films was influenced by the formulation used. The permeation of CP was increased when it was combined with MBr in Bromopic. With Telopic, a mixture of 1,3-D and CP, the permeation of 1,3-D through LDPE film was 62% greater than that of Telone, whereas that of CP was not affected. The permeation rates of both MBr and CP were 25-30% greater when they were formulated as a mixture in Bromopic than when they were formulated individually. The formulation of fumigants as mixtures of two components did not affect their permeability through VIF. This study showed that differences in the suitability of plastic films for soil fumigation can be measured easily in a laboratory. It also showed that the VIP was more effective than LDPE in reducing losses of fumigant to the atmosphere, thus allowing more efficient use of fumigants to manage soilborne pests. The presented method helps us to choose the most adequate film for optimizing fumigation efficacy, and reducing costs and environmental risks.
Note:
Related Files :
1,3-dichloropropene
Chloropicrin
Metam sodium
methyl bromide
Permeation
Plastic film
Soil fumigants
Soil fumigation
Show More
Related Content
More details
DOI :
10.1007/BF02981205
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
21286
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:42
Scientific Publication
Permeation of soil fumigants through agricultural plastic films
34
Austerweil, M., Laboratory for Research on Pest Management Application, Inst. of Agricultural Engineering, Volcani Center, Bet Dagan 50250, Israel
Steiner, B., Laboratory for Research on Pest Management Application, Inst. of Agricultural Engineering, Volcani Center, Bet Dagan 50250, Israel
Gamliel, A., Laboratory for Research on Pest Management Application, Inst. of Agricultural Engineering, Volcani Center, Bet Dagan 50250, Israel
Permeation of soil fumigants through agricultural plastic films
Plastic films are used in soil fumigation to control fumigant emission into the atmosphere. In previous studies it was shown that the plastic films are permeable to fumigant vapors. Virtually impermeable films (VIF) have been developed to reduce such emission and to increase the efficacy of pest control. A rapid, accurate, sensitive and simple method to measure the permeability of plastic films to soil fumigants that was developed in the present study is described in this paper. The method uses a static, closed system in which the tested film is fixed between two cells. The fumigant is sampled by a solid-phase microextraction method and measured quantitatively by gas chromatography. The method was used to assess the permeability of two plastic films - a low-density polyethylene film (LDPE) and a VIF - to commercial soil fumigants formulated individually or in mixtures. All the tested fumigants permeated through the commonly used LDPE film, in the following descending order of permeability: methyl isothiocyanate (MITC), methyl bromide (MBr), 1,3-dichloropropene (1,3-D; Telone), chloropicrin (CP). The VIF was impermeable to all the tested fumigants except MITC, the permeation of which was reduced by 40%. The permeation of some fumigants through LDPE films was influenced by the formulation used. The permeation of CP was increased when it was combined with MBr in Bromopic. With Telopic, a mixture of 1,3-D and CP, the permeation of 1,3-D through LDPE film was 62% greater than that of Telone, whereas that of CP was not affected. The permeation rates of both MBr and CP were 25-30% greater when they were formulated as a mixture in Bromopic than when they were formulated individually. The formulation of fumigants as mixtures of two components did not affect their permeability through VIF. This study showed that differences in the suitability of plastic films for soil fumigation can be measured easily in a laboratory. It also showed that the VIP was more effective than LDPE in reducing losses of fumigant to the atmosphere, thus allowing more efficient use of fumigants to manage soilborne pests. The presented method helps us to choose the most adequate film for optimizing fumigation efficacy, and reducing costs and environmental risks.
Scientific Publication
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