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Flor Prod II Herb Peren & Ann

by: Dorris Gorczany

Flor Prod II Herb Peren & Ann HRT 323

Dorris Gorczany
GPA 3.57


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Class Notes
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This 1 page Class Notes was uploaded by Dorris Gorczany on Saturday September 19, 2015. The Class Notes belongs to HRT 323 at Michigan State University taught by Staff in Fall. Since its upload, it has received 55 views. For similar materials see /class/207223/hrt-323-michigan-state-university in Agricultural & Resource Econ at Michigan State University.

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Date Created: 09/19/15
HRT 491 Lecture notes and study questions November 29 2004 Dr Art Cameron USDA definition of a potted owering crop 7 defined as a owering plant destined for use in the home or in protected patios 7 USDA uses these definitions to track dollar value of crops Value of Potted owering crops Michigan 30 million USA 829 million So relatively significant7 second most valuable oriculture crop7 behind bedding plants Michi an 7 number 6 in countr 7 California by far 1 7 partially due to mild coastal climate 7 growers can even produce crops outdoors with little protection 7 which reduces production costs 7 high light cool temps 7 great quality 7 difficult to compete with this in Michigan 7 since cost of energy continually rising followed by Florida Texas New York North Carolina and then Michigan Top 5 potted owering crops Poinsettia 250 million Orchid 120 million Florist mum 76 million bulbs 55 million Florist azalea 41 million Industry is not growing significantly at this time except for orchids 7 Poinsettias difficult to make a net profit7 but growers still produce poinsettias mostly to keep employees busy and to cover the cost of overhead7 more profits are generally made in spring crops in Michigan Spring bulbs are holding their own 7 while mums and African Violets are down Easter Lilies are covered in HRT 323 7 Michigan is generally 1 or 2 in country other is California 7 generally grown by a few very large growers 7 including Henry Mast Michigan is 3 in Dutch bulbs 7 sold as potted owering crops Other important Michigan oriculture crops are covered more in depth in HRT 323 1 in potted seed geraniums New Guinea Impatiens and potted hostas 2 in vegetative geraniums Poinsettia still well over 2x value of next crop orchids gt sold almost exclusively between early November and Christmas 7 peak is first week ofDecember 7 this tradition has spread to Eurpoe and Australia 7 almost nowhere else 7 note that is grown as landscape plant in Southern California and muc gt native to Mexico and Guatamala gt blooms naturally in the winter months around Christmas 7 favored by the Aztec Indians and presumably pre Aztec Indians Extracted a purplish dye from bracts and used latex for treating fevers Plant family 7 Euphorbiacea 7 includes many species from around the globe even many common garden plants Poinsettia History as Pot crop Ioel Poinsett7 was an ambassador to Mexico in early 1800s 7 sent plants back to South Carolina 7 and eventually made it into the trade 7 and eventually grown as a landscape plant in southern California7 which is where Albert Ecke found it growing in early 1900s 7 it was Ecke who promoted as a symbol of Christmas 7 good marketing I Grew plants in fields 7 sent the plants across the USA in boxcars then cuttings were taken from these mother plants to produce the final crop 7 early varieties were ungainly 7 and faded in colors easily7 In 1960s started shipping cuttings 7 from California 7 which they still do today 7 though stock plant production is moving to central America Poinsettia Production Poinsettia is a short day plant7 maintain under long days to keep vegetative Flower induction usually occurs just about the equinox 7 September 20 7 when biological daylength is about 12 34 hours 7 why not 12 hours Stock plants 7 like plenty of light for healthy fat stems for propagation7 grow at moderate temperatures 7 the problem in Michigan is that this is in the summer7 traditionally stock plants have been grown in Southern California along the ocean where summer temps are moderate 7now 7 more and more cuttings are produced offshore 7 meaning Central America 7 where temps are moderate Usually stock plants are started in Fe ruary 7 primary cuttings are harvested from July 5 to August 23 7 depending on size of final plant7 early cuttings for larger plants 7 poinsettia cuttings are taken by hand 7 labor intensive 7 Rooting 7 under noninductive conditions 7 meaning long days 7 use lights i necessary 7 but often this is done in the middle of the summer7 a rooting hormone 7 ie IBA is generally applied to improve uniformity of rooting 7 most cuttings are rooted directly in the final container direct sticking which saves labor 7 but takes more room in the beginning 7 often greenhouses are not that full at the end of summer7 so space is not that much of an issue 7 root at about 75F an purchase rooted cuttings 7 but relatively expensive 7 and must be handled quickly 7 One major problem is botrytis 7 a fungal pathogen that strikes if plants are too wet 7 another is fungus gnats 7 an insect7 the larval phase loves wet media and will eat the newly formed roots from the cuttings 7 this can greatly delay propagation Start fertilizing as soon as cuttings root7 this is easier when they are directstuck 7 usually after as little as 712 days Misting 7 usually computer controlled7 reduce frequency as crop roots to avoid problems with excessive moisture 7 mist more midday 7 reduce to none at night Pinching generally poinsettias are single stemmed unless you pinch7 usually pinched 4 weeks after sticking 7 generally pinched to increase branching and hence ower number 7 pinching is best when hard 7 soft pinches are only used when your crop is late 7 and can lead to lack of uniformity 7 pinching for a 6 crop is generally around September 8 7 thus there is about 2 weeks until natural ower induction see schedule in textbook 7 page 504 7 but remember that earlier pinching leads to larger plants 7 late pinching for short plants 7 see Table 115 7 text varieties Ecke largest Fische Four major companies selling poinsettia Dummer Oglevee


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