Laboratory evaluation of the efficacy of antiblue and biocide in the control of sapstain and mould fungi on Pinus elliottii

Abstract

Results of a test on the effects of Antiblue and Biocide at various concentrations and times of immersion on the growth sapstain and mould fungi are presented. Antiblue (active ingredient, sodium pentachlorophenate) was the better chemical providing com ete control at the lowest concentration of 1.5 %. Biocide, a chlorinated derivative and local suestitute for Antiblue, provided 55 control at 4 and 8 % concentrations and 74 % control at the highest concentration of 12 Yo. The time of immersion did not have a significant effect on the incidence of stain and mould.

Sapstain and mould pine timber: Field screening of pine species and preventative chemicals

“…Laboratory studies on the efficacy of Antiblue and Biocide T.T. against stain and mould fungi (Masuka, 1991) showed that a concentration of 1,5 per cent Antiblue was effective against tested fungi. The same concentration provided less protection in the field.…”

“…(an ammoniumbased chemical), in the control of sapstain and mould fungi. The results of those investigations, and causative fungi, are reported elsewhere (Masuka 1991(Masuka , 1992. Antisapstain chemicals were traditionally formulated for the prevention of stain and mould development in air-dried timber following sawing.…”

“…Losses incurred bv the Zimbabwe timber industry due to customer prejudice against stained and m oulded pine tim ber are substantial (Masuka, 1991). These led to the initiation of a major project in 1989 to search for prophylactic and palliative solutions to the problem .…”