Effect
No effect on drought stress tolerance
No effect on nitrogen N use efficiency
No effect on produce quality
Phylgreen treated Surfinia, cv. Surfinia White, grown in a peat-based substrate in combined drought and nitrogen stress conditions had on average 10 % less branches, 1 % shorter branches, 14 % less flowers (only determined at -20 % reductions), 2 % less fresh weight, 3 % less dry weight, 9.5 % less root development, a 5 % higher chlorophyll-index, a 1 % lower flavonol-index, a 6.5 % higher anthocyanin-index and a 4 % lower stomatal conductance (only determined at -40 % reductions) compared to the untreated controls grown in the same conditions. No significant effects
Trial details
Indoor, greenhouse, peat-based substrate, drought conditions (20 % or 40 % less irrigation) and reduced nitrogen (-20 % or -40%)
Belgium
Crop
Surfinia, Petunia x hydrida
Trial application
Method
Foliar spray
Timing
Every 15 days
Rate
20 % reductions: 1.5 L/ha; 40 % reductions: 0.5 L/ha
2019-2020
Bio4safe trial reports Surfinia 2019-2020
Crop group
