Begonia ( Begonia semperflorens & Begonia x hybrida )
Deep dive into technology
Syngenta Flowers APAC Technical Webinar for Tropical Regions 23-07-2025 2 p.m.
Inka Orange 70041091
Short recap of previous Webinar.
• Introduction into Syngenta & Floranova begonia assortment. • Opportunities with Syngenta & Floranova begonia portfolio. • Phytosanitary and quarantine reminder. • 5 elements of successful begonia production. • Germination stage. Take care about air humidity. • Keep begonia’s seedlings in warm and shady conditions. • Don’t feed begonias too much. Avoid high EC. • Protect plants from Sciarids and Fungus gnats.
Your questions are welcome through Q&A!
https://www.youtube.com/watch?v=djaTlTX7mQ8
Public
Begonia assortment reminder #1
Bada Bing
Bada Boom
Topspin
Eureka
Volumia
Variety
Leaf Color
Green
Bronze
Green
Green & Bronze
Green
Specific features
Excellent landscaping performance Excellent landscaping performance
Cold toletant
Heat lover
Extra large flowers
Pant size
15 – 20 cm W, 20 – 25 cm H
15 – 20 cm W, 20 – 25 cm H
20 – 25 cm W, 20 – 25 cm H
18 – 23 cm W, 20 – 25 cm H
18 – 23 cm W, 20 – 30 cm H
Suitable container size
Packs / 8 – 10
Packs / 8 – 10
Packs / 8 – 10
Packs / 9 – 11
10 – 12
Portfolio
5 colors & 2 mixes
6 colors & 1 mix
4 colors & 1 mix
8 colors & 1 mix
3 colors
Time after potting, week
6 – 8
6 – 8
6 – 8
7 – 9
6 – 8
Public
Begonia assortment reminder #2
Braveheart
Bowler
Tophat
Bionic
Variety
Leaf Color
Green
Bronze
Green
Green & Bronze
Excellent combination of bronze leaf & pure white flowers
Specific features
Unique flower color & habit
Largest flowers & excellent habit
Exceptionally well branched
Pant size
40 – 50 cm W, 40 – 50 cm H
50 – 60 cm W, 30 – 45 cm H
50 – 60 cm W, 40 – 50 cm H
50 – 60 cm W, 40 – 50 cm H
Suitable container size
12 – 17
12 – 17
12 – 17(20)
12 – 20, hanging basket
Portfolio
Stand alone variety
Stand alone variety
4 colors
4 colors
Time after potting, week
9 – 12
6 – 8
6 – 8
9 – 12
Public
Begonia in a landscape.
Page 19 – 2024/25 Catalog
Syngenta
Public
Another opportunity with Begonia #1.
Flower size champion.
Tophat series has the largest flower among the Begonia hybrida varieties .
8 cm is a normal length for the Tophat’s flowers.
Public
Another opportunity with Begonia #2.
Cold resistant champion. Topspin able to hold even +12 ° C in production .
Public
Another opportunity with Begonia #3.
Fastest champion.
Competitor var.
Tophat Rose Bicolor
Tophat and Bowler coming to bloom two weeks earlier than competitors.
Two weeks earlier in the sales!
Public
Another opportunity with Begonia #3.
Champion in branching.
Better branching ability provides excellent landscaping performance.
Public
5 elements of success with Begonia.
pH below 5.9 !
Keep root ball below the substrate.
Avoid PGRs.
Keep plants drier.
Beware of NH4 + !
Public
https://www.youtube.com/@SyngentaFlowersAPAC/videos
When to transplant?
Two―four true leaves is the best stage*.
Public
Substrate for finishing.
• Suitable substrate components: peat > cocopeat > wood fiber peat > rice husk > composts > natural soils. With particle size 10 ―20 mm. • Add 25―3 0 % leavening agent: perlite > sand > zeolite (not vermiculite) • Substrate mixture examples :
✓
70 % cocopeat + 30 % perlite,
✓ 55 % cocopeat + 20 % peat + 25 % perlite,
✓ 50 % cocopeat + 20 % natural soil + 30 % perlite.
pH below 5.9 !
•
But not forget the proper pH: 5.5―5.9
Even natural components are applicable
5
2 3 4
6 7 8
Public
How to transplant?
Keep root ball below the substrate.
Public
How many plants?
Pot size
Large Packs 0.5 l
6 l hanging basket
8 l hanging basket
Species
Series
Packs
1.0 l
1.25-2.5 l3-8 l
Bada Bing
1 ppp 1 ppp 1 ppp 1 – 2 ppp 3 ppp -
5 – 6 ppp
-
Bada Boom 1 ppp 1 ppp 1 ppp 1 – 2 ppp 3 ppp -
5 – 6 ppp
-
Topspin
1 ppp 1 ppp 1 ppp 1 – 2 ppp 3 ppp -
5 – 6 ppp
-
Eureka
1 ppp 1 ppp 1 ppp 1 – 2 ppp 3 ppp -
5 – 6 ppp
-
Begonia semperflorens
Volumia
1 ppp 1 ppp 1 ppp 1 ppp 2 – 3 ppp -
5 – 6 ppp
-
Braveheart
1 ppp 1 ppp 1 ppp 1 ppp 2 – 3 ppp -
3 – 4 ppp
-
Bowler
-
1 ppp 1 ppp 1 ppp 1 ppp -
3 ppp
4 – 5 ppp
Tophat
1 ppp 1 ppp 1 ppp 1 ppp
3 ppp
Begonia x hybrida
Bionic
1 ppp 1 ppp 1 ppp 2 – 3 ppp
3 ppp
3 – 4 ppp
Public
General condition.
•
Temperature - Day:
18 19 20 21 22 23 24 25 26
- Night:
18 19 20 21 22 23 24 25 26
•
Light intensity : 40―60 KLux
Partial Sun/Shade
Light Shade
Moderate Shade
Heavy Shade
Full Sun
Level 5 SATURATED
Level 4 WET
Level 3 MEDIUM
Level 2 MEDIUM DRY
Level 1 DRY
Keep plants drier.
Public
Begonia fertigation tips #1.
Before the flower buds appear.
• Provide 125 ―175 ppm of nitrogen (N). • You can provide proper amount of N by 0.8―1.3 g/l of 18-5-18, 15-3-15 or similar.
NPK: 18-5-18, 15-3-15 or similar.
• Optimal EC in the water 1. 5―2.0 mS/cm. • Optimal EC in the substrate (SME*): 0.5―0.75 mS/cm.
Avoid ammonia in the fertilizers .
Beware of NH4+!
Plant doesn’t show the flower bud yet.
• Substrate and water pH: 5.5―5.9.
5
2 3 4
6 7 8
* Saturated Media Extract.
Public
Begonia fertigation tips #2.
After the flower buds appear.
• The same recommendations but NPK rate must be changed.
NPK: 18 -5- 40 , 15 -3- 35 , 17 -5- 30 or similar.
N/K rate must be about 1:1.5―1:2 .
✓ Never apply clean water!!! Good Fertigation Practice reminder .
Beware of NH4+!
✓ Provide recommended EC (1.5―2.0 mS/cm) and pH (5.5―5.9) with every watering.
Plant showed the flower bud already.
✓ Don’t forget to apply Ca+Mg every 2 weeks.
✓ Don’t apply too much phosphorus!
Public
Ready plants fertigation tips.
Not apply Ca & Mg fertilizers to often Apply Ca(NO 3 ) 2 + Mg(NO 3 ) 2 every two weeks only
week 9
week 10
week 11
week 12
week 13
week 14
2.0 2.0
2.0 2.0 2.0
1.7 1.7 1.7
1.7
1.7
1.7 1.7
1.7
1.7 1.7 1.7 1.7 1.7
1.7
1.5 1.5
1.5
1.5
1.5
1.5 1.5
1.5 1.5
1.5
1.5
Water EC, mS/cm
Plants showed the flower bud.
Public
How to recognize begonia gets draught?
Begonias suffering from drought behave differently than other plants. The most recognizable sign is the glossy leaf surface. It looks like covered by oil.
Public
Begonia disease management.
Diseases management is not only the chemicals application!
Elements of protection…
• Hygiene & quarantine. • Resistant genetic (XDR).
• Scouting. • Growing conditions (T, RH, Water, Light, Fertigation)*. • Clean area**, • Chemical protection.
* High relative humidity, low light intensity, watering deficiency all these enhance Plasmopara development.
Erysiphe begoniicola (formerly Microsphaera begoniae)
** If there are many plant residual in the greenhouse spores of fungal diseases will come to the plants constantly right after fungicides protection will stop.
Public
Powdery mildew management.
Systematic drought can promote powdery mildew infection!
How to avoid this?
✓ Avoid regular drought, ✓ Avoid water dripping,
✓ Avoid hanging baskets above the begonia, ✓ Avoid too high air humidity (RH %),
Avoid water dripping
✓ Avoid too big difference in
temperature and air humidity.
Public
Begonia disease management.
Most common Begonia diseases.
Disease
Active ingredients (rate in chemical)
Active Ingredient concentration in solution*
Use as prophylactic
mancozeb (640 g/kg) + mefenoxam (metalaxyl-M) (40 g/kg)
3.2 g/l mancozeb + 0.2 g/l mefenoxam
+
azoxystrobin (200 g/l) + cyproconazole (80 g/l)
0.4 g/l azoxystrobin + 0.16 g/l cyproconazole
Powdery mildew
pyraclostrobin (12.8 %) + boscalid (25.2 %)
0.08 g/l pyraclostrobin + 0.16 boscalid
triflumizole (42,14%)
0.18 g/l
iprodione (50%)
1.25 g/l
tetrachloroisophthalonitrile (82.5%)
0.83 – 1.2 g/l
Botrytis
fenhexamid (50%)
0.5 – 0,75 g/l
pentachloronitrobenzene (75%)
0.75 – 1,25 g/l
* Rotate active ingredients (AI). Don’t apply the same AI more than 3 times at row.
Don’t forget to check phytotoxicity!
Public
Thrips management #1.
PGRs can be cause of flower size reduction.
Avoid PGRs.
• Possible PGRs: Cycocel® (500 – 1,000 ppm) or B-Nine WSG/Cycocel (1,500 ppm B-Nine /300 ppm Cycocel). • Never apply paclobutrazol on Begonias!
Public
* Rotate active ingredients (AI). Don’t apply the same AI more than 3 times at row. Check phytotoxicity!
Begonia from start to finish.
Week
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Stage:
seedlings development
tranplanting
plants development
Blooming
germination (1-3 days)
Chamber:
Optional
Temperature day, 0 C
22 — 26
20 — 21(24)
19 — 20(24)
Temperature night, 0 C
22 — 26
20 — 21(24)
18 — 19(20)
Substrate humidity, 1 — 5
5
3 — 4
2 — 4
Tray/pot type → Spacing, cm
288-cells
big trays, pot: 8 (10)
Substrate pH, 1 — 14
5.5 — 5.9
5.5 — 5.9
2.3
2
2
2
1.5 — 1.7
1.7
1.7
1.5
1
Water EC, mS/cm
Ca+Mg application (↑)
0.5
0.5
Substrate EC (SME), mSm/cm
0.5 — 0.7
0.5 — 0.75
1.5 — 2.1
Fertifation (N), ppm
—
50 — 75
125 — 175
NPK rate, & Ca+Mg application (↑)
—
15 – 5 – 15
15 – 5 – 15
10 – 5 – 17, 10 – 3 – 20, 15 – 3 – 35
Light intensity, KLk
30 — 45
40 — 60
not required for germ.
Day length, hours
—
Day neutral
Day neutral
pinching
—
not recommended
not recommended
Cycocel® at 300 ppm (1 time optional)
Cycocel® at 500 – 1,000 ppm (1 time optional)
PGRs
—
Public
Begonia from start to finish. How long?
Pot size
Large Packs 0.5 l
6 l hanging basket
8 l hanging basket
Species
Series
Packs 4 – 5 weeks 4 – 5 weeks 4 – 5 weeks 4 – 5 weeks 4 – 5 weeks 4 – 5 weeks
1.0 l
1.25-2.5 l 3-8 l
4 – 5 weeks 4 – 5 weeks 4 – 5 weeks 4 – 5 weeks 4 – 5 weeks 4 – 5 weeks 4 – 5 weeks 4 – 5 weeks
5 – 6 weeks 5 – 6 weeks 5 – 6 weeks 5 – 6 weeks 5 – 6 weeks 5 – 6 weeks 4 – 5 weeks 4 – 5 weeks 7 – 8 weeks
5 – 6 weeks 5 – 6 weeks 5 – 6 weeks 5 – 6 weeks 5 – 6 weeks 5 – 6 weeks 5 – 6 weeks 4 – 5 weeks 7 – 8 weeks
5 – 7 weeks - 5 – 7 weeks - 5 – 7 weeks - 5 – 7 weeks - 5 – 7 weeks - 5 – 7 weeks - 5 – 6 weeks -
Bada Bing
7 – 8 weeks
-
Bada Boom
7 – 8 weeks
-
Topspin
7 – 8 weeks
-
Eureka
7 – 8 weeks
-
Begonia semperflorens
Volumia
7 – 8 weeks
-
Braveheart
7 – 8 weeks
-
Bowler
-
6 – 7 weeks
6 – 7 weeks
5 – 6 weeks
Tophat
6 – 7 weeks
Begonia x hybrida
8 – 9 weeks 8 – 9 weeks
Bionic
8 – 9 weeks
9 – 10 weeks
Public
Q&A session.
•
Thank you for your time.
• For more information, please contact your Key Account Manager.
Ivan.Pozdnyakov@syngenta.com Technical Sales Specialist SA/SEAP
Mallikarjun.Mangrule @syngenta.com Michael van Baekel Head of Marketing APAC
Gautam.Sangle@syngenta. com Key Account Manager SA (South Asia) (India, Nepal, Bangladesh)
Mallikarjun.Mangrule @syngenta.com Head of APAC
https://www.syngentaflowers.com/
Public
Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26Made with FlippingBook Learn more on our blog