Abstract：
:To develop alternatives to methyl bromide (MeBr) for soil disinfection under environmental Moroccan conditions, distribution and persistence of 1,3-dichloropropene (1,3-D) and methyl isothiocyanate (MITC) were tested in undisturbed soil columns (12 cm internal diameter, 1 m length). 1,3-D was injected at a 15 cm depth and directly followed by metam-sodium (a precursor of MITC), which was applied at the soil surface of the same column using a peristaltic pump. Concerning the distribution of these fumigants in the soil profiles, our results showed that 24 h after treatment, 1,3-D and MITC were concentrated at the 0-40 cm soil layers, and reached the deeper layers 48 h later. MITC and 1,3-D dissipation was studied and the half-life (DT50) measured were 6.5 and 8 days, respectively. Total volatilization losses reached 9% for MITC and 28% for 1,3-D. MITC and 1,3-D volatilization was found to be influence by soil water contents. The results show that by reducing volatilization, photodegradation and leaching of these fumigants a suitable alternative to MeBr use is offered.
journal_name
Chemospherejournal_title
Chemosphereauthors
El Hadiri N,Ammati M,Chgoura M,Mounir Kdoi
10.1016/S0045-6535(03)00109-7subject
Has Abstractpub_date
2003-08-01 00:00:00pages
893-9issue
5eissn
0045-6535issn
1879-1298pii
S0045-6535(03)00109-7journal_volume
52pub_type
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