Needle Damage Development in Norway Spruce Seedlings as Affected by Humidity, Temperature, and Gray Mold: A Preliminary Study

Table 1

Target values and actual means for the ambient conditions used in the treatments in the space of growth chambers and under seedling foliage for the 11 days-test periods.Temp indicates temperature (°C), RH relative humidity (%), VPD vapour pressure deficit (kPa), and SW surface wetness (mV).

Seedling set	Age, months	Trays/; seedlings	Temp, actual	Temp/RH target	RH, actual	VPD, actual	Temp, foliage	RH,  foliage	VPD, foliage	SW, foliage
1	3	4/324	27.4	25/80	83.5	0.64	27.5	92.4	0.31	0.030
1	3	4/324	27.5	25/50	53.2	1.73	25.8	65.6	1.18	0.087
2	3	3/243	17.2	15/80	81.4	0.38	17.7	92.2	0.17	0.042
2	3	3/243	17.8	15/50	54.9	0.94	16.0	68.4	0.59	0.038
1	6	4/324	25.0	25/80	92.4	0.64	25.8	98.3	0.10	0.039
1	6	4/324	25.1	25/50	59.3	1.31	23.1	83.1	0.50	0.068
2	6	3/243	15.8	15/80	89.0	0.37	16.6	98.7	0.06	0.056
2	6	3/243	15.7	15/50	61.0	0.71	14.8	75.5	0.43	0.046
3	5.3	4/324	24.6	25/50	58.5	1.29	21.9	79.0	0.55	0.20
3	5.3	4/324	16.0	15/50	58.6	0.75	15.3	67.9	0.56	0.19
3	5.8	4/324	25.2	25/80	87.7	0.40	24.8	94.3	0.18	0.07
3	5.8	4/324	16.4	15/80	78.5	0.40	15.8	90.5	0.17	0.16