Genetic transformation of two high oleic Helianthus annuus L. genotypes using different
CROP MANUAL Helianthus annuus...2020/03/03 · Helianthus annuus Remarks Vegetative interspecific...
Transcript of CROP MANUAL Helianthus annuus...2020/03/03 · Helianthus annuus Remarks Vegetative interspecific...
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Classification: PUBLICTM
CROP MANUAL
Helianthus annuus
“SUNBLAST”
Central Europe
North Europe
From cuttings to finished
| Crop Manual | 2Classification: PUBLICTM
Finished Plant “Sunblast”
Helianthus annuus
Remarks
Vegetative interspecific Helianthus is a facultative short-day plant.
Young plants are delivered under SHORT DAY propagation
Estimated finished crop time from transplant of a 4 week old 72 X-tray plug and finished at an average daily temperature (ADT) of 20⁰C under short days.
Plants flower under both short days and long days, but flowering is 1 to 2 weeks faster under short days.
Required-pinch at the 6th or 7th leaf node to promote branching.
Crop time is approx. 5-10 days faster at an ADT 23⁰C versus 20⁰C
Series Type Leaf color Pot size Comment
Sunfinity from seed Vigorous dark green 17 - 23 cm focus on 17-19 cm
Calendar Week 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38
Scheduling transplant potting from
72 X-Tray with pinching to a Ø 21 cm
pot.
Pinch in finished crop after approx
one week.
Pinch will delay crop by 7 - 10 days
P & S F F
P & S F F
P & S F F
P & S F F
P & S F F
P & S F F
P & S F F
P & S F F
P & S F F
P & S F F
P & S F F
| Crop Manual | 3Classification: PUBLICTM
Fertilization & Substrate
Important to keep EC levels of
the growing media in the range
of 1,3 – 1,7. Measure the EC
every week. Sunblast is a high
energy plant and needs a lot of
feeding increase the EC in the
substrate is at desired level.
Spacing
Spacing on time during the
culture period is crucial to avoid
stretched and uncontrollable
growth. Recommend spacing
directly after pinch and cotyledon
shoot removal at 5 - 6 pl/m²
Tips & Tricks
Required to improve branching
and control vigor.
Pinch after 6–7 nodes developed
on the stem leaving 4 nodes
only.
The nodes of Sunblast are
scattered so a pinch to 6/7 nodes
would leave 8 leaves.
This is a hard pinch. Do not pinch
too early to avoid issues with
uneven branching.
Irrigation
Sunblast needs to be irrigated on
a regular basis. The Ec given by
feeding is relatively
high because it is a vigorous
plant and consumes a lot.
If the pots are becoming too dry
root damage can happen
because of salt accumulation.
Plug
Plugs are delivered under
SHORT DAY propagation.
Important to transplant the plant
in the center of the pot!
It's very important to apply several PGR application during finishing. Avoid applying PGRs too heavily to try to control Sunblast. Sunblast has a growth spurt and applying PGR at the right moments is very effective.
Recommended application:Sprench (heavy spray). Preferred application: Alar 4gr / 1 ltr1.Laterals breaking /showing after the pinch. 2.Visible bud. This stage is very important.3. At showing color.Higher rates may be necessary under high light and temperature conditions (SET).Spray is also possible but needs to be done more frequently to keep control over the plant.
PGR alternatives: Regalis: 1,5 gr/ltrBonzi: 3ml – 5ml/ltr (After pinch at least once a week to avoid stretching)
Negative results with Cycocel: leaf damages
Cultivation Advice
Helianthus annuus
Pests
Preventive insecticide: Against
chewing insects (caterpillar) Aphid,
spider mites, trips, whitefly.
Diseases
Other soil borne diseases like
Phytopthora Botrytis, Pythium,
Rhizoctonia, Thielaviopsis, Downy
Mildew, rust.
| Crop Manual | 4Classification: PUBLICTM
Legend
Recommendations
Helianthus annuus
Culture guideline at optimum average daily temperature 20–22oC:
Culture week 1 2 3 4 5 6 7 8 9 10 11 12 13
Handling TP & S F F
PGR PD PD
Tempature D/N 18–20°C
Light10-11 hr short days length for optimum flowering results.
Shading ☀short day <12 h/short day treatment
Humidity 50%
Moisture Alternate 4–2
pH 5,8–6,0
EC growing medium 1,75–2,0 mS/cm > 2,25 mS/cm
EC feeding in mS/cm 2,0–2,5 mS/cm 2,5–3,0 mS/cm
Fertilizer N : K 1 : 2
| Crop Manual | 5Classification: PUBLICTM
Height 6 / 7 nodes
Young plant ready to pinch
Production Guideline Pot Size
19 cm
Country
Germany
Pinch 5 nodes
Young plant pinched back to 4
nodes, 8 leaves
Pinch 5 nodes Very strong rootsystem
Side shoots removed to create a
uniform plant together with pinch
Helianthus annuus
1 2
Young shoots are showing
aftre a couple of days
3 4