Hydrogen cyanide for treating wood against pine wood nematode (Bursaphelenchus xylophilus): results of a model study

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 1 Number of surviving nematodes (mean from five replicates ± standard error, number of replicates with surviving nematodes in brackets) after HCN treatment in hermetic fumigation chamber after 2, 4, 6, 8, 10, 12, 14, 16, 18 and 20 h of fumigation, 4 HCN concentrations were tested; moisture content of sawdust (mean from five replicates ± standard error) is also included

Target HCN concentration in gas chamber (g m⁻³)	Nematode inoculum	Exposition time in hours
Target HCN concentration in gas chamber (g m⁻³)	Nematode inoculum	2	4	6	8	10	12	14	16	18	20
12.30	1200	0.25 ± 0.25 (1)^a	0.2 ± 0.2 (1)	0.2 ± 0.2 (1)	0 ± 0 (0)	0 ± 0 (0)	0 ± 0 (0)	0 ± 0 (0)	0 ± 0 (0)	0 ± 0 (0)	0 ± 0 (0)
18.21	1200	0 ± 0 (0)	0 ± 0 (0)	0 ± 0 (0)	0.50 ± 0.29 (2)	0 ± 0 (0)	0.20 ± 0.20 (1)	0.20 ± 0.20 (1)	0 ± 0 (0)	0 ± 0 (0)	0 ± 0 (0)
21.71	1200	0.60 ± 0.40 (2)	2.20 ± 1.43 (2)	1.40 ± 1.17 (2)	1.60 ± 1.60 (1)	2.40 ± 1.91 (3)	0 ± 0 (0)	0.20 ± 0.20 (1)	0.20 ± 0.20 (1)	0 ± 0 (0)	0 ± 0 (0)
24.12	1200	0 ± 0 (0)	1.50 ± 0.96 (2)^a	0 ± 0 (0)	0.25 ± 0.25 (1)^a	0.25 ± 0.25 (1)^a	0 ± 0 (0)	0.25 ± 0.25 (1)^a	1.00 ± 1.00 (1)	0 ± 0 (0)	0.75 ± 0.48 (2)^a
0 (control)	1200	1150 ± 103 (5)	1091 ± 66 (5)	1342 ± 49 (5)	1490 ± 227 (5)	1222 ± 121 (5)	1198 ± 129 (5)	1045 ± 64 (5)	1052 ± 59 (5)	1440 ± 159 (5)	1391 ± 305 (5)
Average moisture content of sawdust in percent
		32.30 ± 1.10	30.99 ± 1.08	29.74 ± 1.06	28.48 ± 1.05	27.28 ± 1.02	26.06 ± 1.06	24.94 ± 0.99	23.84 ± 0.97	22.72 ± 0.94	21.69 ± 0.91