Wood preservative and method for producing same
a preservative and wood technology, applied in the field of biocidal compositions, can solve the problems that copper compounds alone cannot be used as wood preservative treatments, and achieve the effect of reducing the number of dissolved compounds
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example 1
[0093]The synergism was determined using a modified method as described by Kull et al. (Applied Microbiology, 1961 (9): 538-541). The modified method is described as below:
QA / Qa+QB / Qb=SI
Where:
[0094]Qa=concentration of substance A alone which controls a particular decay fungus
Qb=concentration of substance B alone which controls a particular decay fungus
QA=concentration of substance A in the concentration of the A and B mixture at which controls a particular decay fungus
QB=concentration of substance B in the concentration of the A and B mixture at which controls a particular decay fungus
SI=1 means additivity
SI>1 means antagonism
SI<1 means synergism
example 2
ic Activity of a Combination of Copper Fungicide and Penflufen Against Various Wood Decay Brown Rot Fungi
[0095]Wood cubes measuring 19 mm×19 mm×19 mm were prepared from southern pine sapwood. One set of wood cubes were pressured treated with serial treating solutions containing penflufen fungicide. A second set of wood cubes were pressure treated with treating solutions containing the copper fungicide. A third set of wood cubes were pressure treated with treating solutions containing a mixture of the copper and penflufen. The treated wood samples were exposed to various fungi to conduct a laboratory decay resistance test following protocols as described in American Wood Protection Association Standard E10-2015. Before and after exposure to fungi, the wood samples were weighed to determine the weight percent loss. No weight loss means complete control of the fungal attack. The results are reported in Table 1.
TABLE 1Copper Retention inCu to PenflufenBrown Rot FungiWood as Cu in kg / m3R...
example 3
es Treated with Amine Copper and Penflufen Field Efficacy Testing
[0096]Wood stakes measuring 19 mm×19 mm×450 mm were prepared from southern pine sapwood. The wood stakes were treated with treating solutions containing a copper ethanolamine solution and a penflufen emulsion at different ratios varying from copper:penflufen of 5:1 to 200:1. The treated wood stakes were installed in field testing plots such as Gainesville, Fla. and Maunawili, Hi., and both testing locations have been well established to have severe decay hazard. The field stakes were inspected for efficacy against decay fungi and termite annually, and the test were conducted following protocols as described in American Wood Protection Association Standard E7. The annual inspection results from both filed locations indicated that wood stakes treated with copper and penflufen are resistant to decay and termite attack.
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