Effect
No effect on produce quality
No effect on drought stress tolerance
Phylgreen + Delfan Plus V treated Hydrangea, experimental cv. comparable to 'Bobo', grown under periodic drought stress conditions didn't have differences in number of branches (-2.6 %), branch length (-0.8 %), fresh weight (+5%), dry weight (+3.1%), root developement (+7%), significant less flowers in youngest develomental stage (score 1) (-46.7%), no differences in number of flowers in stage 2 (-6.4%), stage 3 (+10.6%), stage 4 (+92.9 %) and had significant more fully developed flowers (stage 5) (+139.3%) compared to the untreated control grown under the same conditions.
Trial details
indoor, greenhouse, peat-based substrate, drip-irrigated, repeated drought stress cycles
Belgium
Crop
Hydrangea, Hydrangea paniculata
Trial application
Method
Foliar spray
Timing
Phylgreen: every 14 days; Delfan Plus V: during stress
Rate
Phylgreen: 0.5 mL/L; Delfan Plus V: 2 mL/L
2021
Bio4safe trial report Hydrangea 2021
Crop group