Table 1.

Foliar symptoms and survival of 13 pine species subjected to NaCI spray

Specie.	Average symptoms (%)^{^z} (treated minus control) Time after the first year's spraying ende.			Survival of treated plants (expressed as % survival of control plants)^{^y} Time after the first year's spraying ende.
Specie.	2 weeks	4 weeks	17 weeks	17 weeks	1 year	2 years	2½ years
P. thunbergii	0 a	0 a	3 a	100	100	89	89
P. ponderosa	1 ab	2 ab	6 ab	100	95	95	95
P. nigra	5 bc	3 abc	5 ab	95	85	89	89
P. strobiformis	6 bcd	6 bcd	37 bc	90	80	75	65
P. cembra	6 bcd	5 bcd	24 abc	80	59*	47*	6*
P. densiflora	7 cd	11 cde	27 abc	57*	46*	32*	32*
P. aristata	7 cd	21 e	43 c	50*	43*	38*	17*
P. parviflora	11 cde	25 e	46 c	63	71	73	40*
P. peuce	12 cde	22 e	28 abc	67	50*	33*	17*
P. resinosa	14 de	17 de	42 c	47*	42*	37*	26*
P. sylvestris	14 de	23 e	33 bc	90	80	70*	60*
P. banksiana	18 ef	17 de	44 c	68	44*	22*	11*
P. strobus	27 f	45 f	85 d	40*	40*	25*	15*

↵z Mean separation within columns by Duncan’s New Multiple Range Test, 5% level. Numbers followed by the same letter within columns not considered significantly different.
↵y An asterisk indicates a significant decrease at the 5% level in the number of seedlings surviving the salt spray compared to those surviving the water spray treatment.