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Methyl Bromide Disperser

The use of methyl bromide (CH3Br) as a forest nursery soil fumigant is now a recognized and standard practice. It is normally dispensed from a one pound pressurized can with the aid of a puncturing device which incorporates a 1/4-inch diameter plastic tube of variable length that passes from the can beneath an airtight plastic or rubberized seed bed cover. As the liquid leaves the hose it is under considerable pressure which tends to toss the hose end erratically causing the methyl bromide to be improperly dispersed. The several types of dispersing gadgets which have been designed to overcome this shortcoming usually have two disadvantages: the soil immediately beneath the disperser does not receive a sufficient amount of gas to be effectively fumigated and initial vaporization is either too rapid or slow.


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Author(s): John William Andresen

Publication: Tree Planters' Notes - Issue 31 (1958)