Why is it that phosphine is the only fumigant normally used for intransit fumigation?
Phosphine is normally recommended because, if the fumigation is carried out correctly, residues remaining in the commodity will be very low and almost undetectable, however long the exposure period. By contrast, Methyl Bromide will accumulate unacceptably high levels of inorganic bromide residues in the commodity if the fumigation period is extended beyond 24-48 hours. IMO recommend methyl bromide is not used for intransit fumigation.
