Performance of gelled, pelletized, and liquid metham sodium as internal remedial treatments for Douglas-fir poles
Morrell, J.; Schneider, P.; Forsyth, P.
Forest products journal 48(10): 75-79
The effectiveness of gelled metham sodium (40% sodium n-methyl-dithiocarbamate or NaMDC) against wood-degrading fungi was compared with that of conventional liquid metham sodium in a series of laboratory trials. Gelled metham sodium appeared to decompose to methylisothiocyanate at slightly higher levels than did the liquid formulations, although the degree of fungal control did not differ markedly. Field trials of gelled and a pelletized formulation containing 25 percent NaMDC indicated that both performed in a manner similar to that previously found with the liquid formulation, with levels of residual chemical declining between 2 and 3 years after treatment. The results indicate that the performance of the gelled and pelletized formulations is comparable to that of the liquid formulation, but the former two provide a safer means of application.