Poinsettia (Euphorbia pulcherima Wild.) Pot ( Christmas Tree) Point of interest  color of bract.

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Presentation transcript:

Poinsettia (Euphorbia pulcherima Wild.) Pot ( Christmas Tree) Point of interest  color of bract

Tip of a leaf  short day condition become red pink yellow (depend on varieties) Stem : cylindric, have with latex Leaf : ellips, sdkt bersudut, length 10-21cm Local : shape of leaf  egg round Import : varieties Bract  not a part of flower Flower appear on tip of plant with Short Day Condition Flower structure (cyathium)  surrounding of bract Function : decoration, indoor plant, Short Day pot plant

Altitude  400 – 1100 m dpl, many type of soil with well drained and aeration, pH 5.5 – 6.5, temperature C. for vegetative growth  require full light for flowering  SD treatment Growth condition required Propagation Seed, media, planting, pinching, fertilize and nutrition, flowering, Growth regulator, handling pest and disease.

sturdy, not heavy, elastic Mini Poinsetia  Ø pot 10 cm ( 1 plant ) Pinching  Ø pot 15 cm Ø pot 20 cm ( for 5 plant) Before planting  watering media  dense & wet spreadly Soil / alternative media  cheap, easy to get it, and not heavy. Peat moss, charcoal, cocopeat ( 4 :4: 1)  well drained and moisture Media Pot

Seed and Stock Plant Breeding from abroad. Propagation  must have license from breeder  need to buy mother plant  each of cutting  charge royalty from breeder. Stock plant must free from disease and insect. Good stem and no initiation. shoot cutting is better than stem cutting. Internode  1 – 1.50 cm Bad seedling  shoot compactless, berjauhan, kurang rimbun Cutting on early morning  fresh  cut 7 cm, Ø 0.5 cm, + rootone F  planting before sun light. Root zone  give it insect screen and shading net keeping moisture at 90 – 100 % (+ sprinkle above), intensity reduced 50%, complete with lamp for adding fotoperiode on night. Intensity fc, T 21 o C, callus 12 days, root 16 – 20 days

Seed planting  as same as type of plant Basket ( tajuk lebar )  5 seedling / pot, tinggi should have same  not efficien 1 seedling/pot  have already rooted  can choosen tinggi yang seragam, probability of life is bigger. If there is no root yet  pinching  plant in the middle of pot SDP  bakal bunga terbentuk, light < 12 hours. Indonesia 12 hours/day  to prevent pembentukan bakal bunga  plant should give more light on night, 2 hours (long day depends on length of plant yang diharapkan)  at the early of cutting until bract terbentuk Ex : length of plant 30 – 35 cm ( LD)  ± 75 – 90 days after cutting  begin SD Fotoperiode

At the beginning of SD  40 days bract will be appear More long time on SD  increase number of leave For make the colour of leaves bright  blackout –  covered by black plastic ( for merangsang appear of bract After changing  open blackout for intensity >>> for changing colour PINCHING Reduced dense leaf Increase amount of cyanthium ( rumpun bunga)  selera consumen of Indonesia Bright the colour of bract. The way : Axillary shoots should be pinched ( axillary shoots on tip of stem) Expectation  5 – 6 cyanthium surrounding bract (5-6 beneath leaf ) Plant ready to pinch  at 20 – 30 days Late pinching  can make far away shoot and late growth

Growth regulator & retardan GA3  50 – 100 ppm  stimulating shoot growth Paclobutrazol  inhibitor of biosintesa giberelin & shorter node of stem poinsetia ( inhibitor of oxidation kaurene  kaurenoic acid - Paclobutrazol  easy to dissolved water  foliar spray ( translocation xylem – phloem) - After shoot 2 -3 cm  2-3 x / week until blacout time, concentration ppm

Watering and Fertilizing Need macro  for active growth If N less necessary  carbohydrate changing become fat and pati  for metabolit seccondary  symptom : Leaf appear colour pale green / yellow, small and shorter plant Watering early active phase : Rooting phase  watering for keep moisture and aeration arround plant  16 – 20 days  sprinkler Watering active period – sell to market  drip irrigation Efficient and quickly provided water  pot Ø 20 cm < ± 100 – 150 cc / day

Blackout treatment Function : to stimulating red colour of leaf (bract) With plastic-covered make curve ( R ± 1m) Covered with black plastic tight  make plastic easy to open- close

Pest and Disease Handling Attack  root zone, stem, and leaves Solution : keep clean media and nursery White fly (Bemisia tabact Genn), aphids, thrips, and red spider White fly  make color of leaves are black, produce embun madu  debu menempel Thrips and red spider  sucker leaves water until dried Disease : caused dumping off  Thielaviopsis basicola  root become black, yellow leaves  fall Rhizoctonia solani, Botrythis cinerea and Erwinia carotovora Fisiologis disease  leave fall because Nitrogen defficiency. Low Absorb of N because root not support. Defficiency of Mg  tip of leaf yellowing and fall

Harvest and Postharvest Harvest  between plant, media and pot  compact Height 30 – 40 cm from bottom of pot, leaves has already changing become red ( bract appear) at least 3-4 leaves, beautiful shape, and dense  it’s depend on consumer Spray it, cleaned pot, and put it into plastic  box or container  ready to Market