Presentation Zinnia Zesty_May2022_EN

Zinnia Zesty™ Additional Culture Research​ Plant Growth Regulators

Zinnia Zesty™​

Plant Growth Regulator Research at plug stage​ OBJECTIVE​ • To evaluate the effect of PGRs on Zinnia elegans Zesty™ plugs.​ MATERIALS AND METHODS​ • Varieties: Zesty Fuchsia, Pink, Purple, Scarlet, and White​ • Sow date: week 12​ • Plug tray size: 288 cell​ • Plug PGR treatment:​ • Paclobutrazol (Bonzi) 2ppm sprench at sowing, then daminozide (B9 or Alar) 2500ppm 2 weeks after sowing​ • Daminozide 2500ppm at 1 week after sowing, repeated 1 week later​ • Control​

Zinnia Zesty™​

Plant Growth Regulator Research at plug stage​ Paclobutrazol 2ppm sprench + daminozide 2500ppm spray

2 x daminozide 2500ppm spray

Control

Zesty Fuchsia 3 weeks after sowing

Zinnia Zesty™​

Plant Growth Regulator Research at plug stage​ Paclobutrazol 2ppm sprench + daminozide 2500ppm spray

2 x daminozide 2500ppm spray

Control

Zesty Pink 3 weeks after sowing

Zinnia Zesty™​

Plant Growth Regulator Research at plug stage​ Paclobutrazol 2ppm sprench + daminozide 2500ppm spray

2 x daminozide 2500ppm spray

Control

Zesty Purple 3 weeks after sowing

Zinnia Zesty™​

Plant Growth Regulator Research at plug stage​ Paclobutrazol 2ppm sprench + daminozide 2500ppm spray

2 x daminozide 2500ppm spray

Control

Zesty Scarlet 3 weeks after sowing

Zinnia Zesty™​

Plant Growth Regulator Research at plug stage​ Paclobutrazol 2ppm sprench + daminozide 2500ppm spray

2 x daminozide 2500ppm spray

Control

Zesty White 3 weeks after sowing

Zinnia Zesty™​

Plant Growth Regulator – Recommendations at plug stage • Zinnia Zesty plugs are responsive to daminozide (B9 or Alar) 2500ppm spray at one week after sowing.

Repeat one week later if necessary.

• The alternative PGR treatment is to use paclobutrazol (Bonzi) 2ppm sprench at sowing, or radicle emergence stage, to control hypocotyl stretch. Follow up with a daminozide 2500ppm spray two weeks later.

Zesty Purple

Zinnia Zesty™​

Plant Growth Regulator Research at finish stage OBJECTIVE To evaluate the effect of PGRs on Zinnia elegans Zesty™ at finish stage.

MATERIALS AND METHODS • Varieties: Zesty Fuchsia, Pink, Purple, Scarlet, and White • Transplant date: week 15 • Container size: 13 cm pot with 1ppp • Finish PGR treatments: • paclobutrazol (Bonzi) 5ppm drench at 2 weeks after transplant (WAT) • 2x daminozide (B9) 2500/ chlormequat chloride (CCC) 350ppm spray at 2 and 4 WAT • 2x daminozide 2500ppm spray at 2 and 4 WAT • Control

Zinnia Zesty™​

Plant Growth Regulator Research at finish stage 2x daminozide 2500/ chlormequat chloride 350ppm

Paclobutrazol 5 ppm drench

2x daminozide 2500 ppm

Zesty Fuchsia

Control

2x daminozide 2500/ chlormequat chloride 350ppm

Paclobutrazol 5 ppm drench

2x daminozide 2500 ppm

Zesty Pink

7 weeks after transplant

Control

Zinnia Zesty™​

Plant Growth Regulator Research at finish stage 2x daminozide 2500/ chlormequat chloride 350ppm

Paclobutrazol 5 ppm drench

2x daminozide 2500 ppm

Zesty Purple

Control

2x daminozide 2500/ chlormequat chloride 350ppm

7 weeks after transplant

Paclobutrazol 5 ppm drench

2x daminozide 2500 ppm

Zesty Scarlet

Control

Zinnia Zesty™​

Plant Growth Regulator Research at finish stage 2x daminozide 2500/ chlormequat chloride 350ppm

Paclobutrazol 5 ppm drench 2x daminozide 2500 ppm

Zesty White

7 weeks after transplant

Control

Zinnia Zesty™​

Plant Growth Regulator Research at finish stage 2x daminozide 2500 ppm

Paclobutrazol 5 ppm drench

8 weeks after transplant

2x daminozide 2500 ppm

Paclobutrazol 5 ppm drench

9 weeks after transplant

Paclobutrazol drench had a longer residual activity.

Zinnia Zesty™​

Plant Growth Regulator - Recommendations at finish stages • All PGRs elicited height reduction in Zinnia Zesty.

• Daminozide (B9 or Alar) 2500ppm at two and four weeks after transplant worked well. If necessary, daminozide and chlormequat chloride (CCC) tank mix can be used for stronger control.

• Paclobutrazol (Bonzi) 5ppm drench was the strongest and the residual will last longer than daminozide or daminozide and chlormequat chloride tank mix. This is recommended for warmer conditions.

Zesty Scarlet