Table 3.

Lethal salt concentration (SC₅₀) required to reduce leaf photochemical efficiency by 50% based on chlorophyll fluorescence (Fv/Fm) values.

Treatment	Concentration per L	Quercus ilex SC₅₀	Ilex aquifolium SC₅₀
Water (control)	-	7.7%a	6.7%a
Maxicrop Original	10 ml	7.6%a	6.5%a
Maxicrop Original	20 ml	7.4%a	6.8%a
Resistim	10 ml	7.9%a	6.5%a
Resistim	20 ml	8.0%a	6.6%a
Bioplex	10 ml	7.7%a	6.9%a
Bioplex	20 ml	7.3%a	6.6%a
Fulcrum CRV	10 ml	7.9%a	6.5%a
Fulcrum CRV	20 ml	8.0%a	6.3%a
Redicrop	10 ml	7.4%a	6.6%a
Redicrop	20 ml	7.4%a	6.8%a
Crop Set	10 ml	7.6%a	6.9%a
Crop Set	20 ml	7.2%a	6.9%a
Superthrive	0.25 ml	7.8%a	6.6%a
Superthrive	0.50 ml	7.8%a	6.4%a
SD		0.2499	0.1803
CV		0.0342	0.0267

Note: Results are expressed as the percentage concentration of salt spray required to reach the SC₅₀. All values mean of 10 trees; five leaves per tree. Different letters represent significant differences between treatments at the 95% confidence level. SD = Standard Deviation, CV = Coefficient of Variation.