Source: LOUISIANA STATE UNIVERSITY submitted to
ADAPTATION EVALUATION AND LANDSCAPE PERFORMANCE ENHANCEMENT OF HERBACEOUS ORNAMENTAL PLANTS IN LOUISIANA
Sponsoring Institution
National Institute of Food and Agriculture
Project Status
TERMINATED
Funding Source
Reporting Frequency
Annual
Accession No.
0209227
Grant No.
(N/A)
Project No.
LAB93836
Proposal No.
(N/A)
Multistate No.
(N/A)
Program Code
(N/A)
Project Start Date
Oct 1, 2006
Project End Date
Sep 30, 2011
Grant Year
(N/A)
Project Director
Owings, A. D.
Recipient Organization
LOUISIANA STATE UNIVERSITY
(N/A)
BATON ROUGE,LA 70893
Performing Department
HAMMOND RESEARCH STATION
Non Technical Summary
In the ornamental horticulture area, there is a constant release of new plant material that leads to a need for nursery/greenhouse production studies, landscape performance evaluation trials, disease and insect susceptibility studies, and climatic adaptability observations. These new plants are especially pronounced in the herbaceous plant material (annual bedding plants, herbaceous perennials, roses, daylilies, etc.) segment of the industry. Organized plant trials in a simulated consumer and/or commercial landscape setting generate useful information on the suitability of particular ornamental plants in different geographical areas and hardiness/heat zones. This project addresses issues with the landscape performance of herbaceous ornamentals including cultivar selection, inappropriate planting times, issues with growing/planting media in landscape beds (pH and physical properties), disease pressure, weed issues, mulching, and poor irrigation monitoring.
Animal Health Component
100%
Research Effort Categories
Basic
(N/A)
Applied
100%
Developmental
(N/A)
Classification

Knowledge Area (KA)Subject of Investigation (SOI)Field of Science (FOS)Percent
2022123108010%
2032123106040%
2042123106040%
2122123110210%
Goals / Objectives
Rose studies will be conducted to examine the landscape performance of modern rose cultivars as influenced by rootstock selection. In addition, the landscape performance of the newest landscape shrub roses will be evaluated. Earth Kind rose cultivars from Texas will be studied for Louisiana performance. Marigold and zinnia studies will be done to: (1) investigate adaptability of new cultivars such as Zesty and Magellan zinnias, Moonstruck marigolds and new cultivars of Zinnia linearis to be released in 2007; (2) determine the significance of deadheading on flowering performance and reduction of petal blight susceptibility; (3) evaluate fungicides for petal and leaf blight management in landscape performance of zinnia and marigold species and cultivars; (4) evaluate planting time in the landscape to determine the most optimum seasons for landscape performance in south Louisiana; and (5) investigate the effect of irrigation frequency, timing, and volume on zinnia and marigold landscape performance. Adaptability of alternative cool season bedding plants and new cool season bedding plants for Louisiana will be evaluated under field conditions.
Project Methods
A portion of the new project is a cooperative effort with Texas A&M University evaluating the performance of Earth Kind roses in the Baton Rouge area. These rose cultivars primarily consist of old garden (antique) types that are being recommended by Texas A&M University for landscapes due to their low maintenance (irrigation, fertilizations, pruning) requirements and reduced susceptibility to powdery mildew and blackspot. Cultivars included in this effort are Spice, New Dawn, Louis Philippe, Nacogdoches, Puerto Rico, Georgetown Tea, Mrs. Dudley Cross, Reve d'Or, Ducher, Marie Pavie, Carefree Beauty, Belinds's Dream, Mrs. B. R. Cant, Bon Silene, Maggie, Mutabilis, Isabella Sprunt, The Fairy, Pinkie, Perle d'Or, Cecile Brunner, Caldwell Pink, Kirsten Poulsen, and about 30 additional varieties. Also, a cooperative effort with Jackson and Perkins will evaluate own root roses versus budded (Dr. Huey rootstock) roses in a landscape setting. An additional study will evaluate landscape performance of Knock Out, Home Run, Nearly Wild and Wild Thing. These are the four major landscape shrub roses used in the commercial landscape industry. Marigold and zinnia cultivars will be studied. Other treatments will consist of irrigation types (drip, overhead spray, stake, etc.), irrigation volumes (none, every other week, 1X/week, 2X week), deadheading practices, fungicides (mancozeb, propiconazole and others), fungicide application rates (0X, 0.5X, 1X, and 2X), fertilizer sources, fertilizer application rates (0, 0.5, 1, 2, and 4 lbs. N/1000 square feet), planting dates (early spring, mid spring, early summer, late summer/early fall) and plant spacing (6, 12, 18, and 24 inches between individual plants). Experiments will be carried out during the warm season of the year (March to October) over the majority of this LAES project period. Performance will be determined by means of visual quality ratings (as determined by foliage appeal, flowering performance, etc.), flower quantity and quality, disease presence, plant height and other factors. These data will be measured anywhere from weekly to monthly depending on the individual experiments and treatments involved. Cool season annual bedding plants represented a potential area for increased use in commercial and residential landscapes in the Gulf States. Plants to be evaluated will include oesteospermum, larkspur, nicotiana, columbine, gazania, dianthus, calibrachoa, nemesia, bluebonnets, hollyhock, and others. Over the next five years, efforts to evaluate new warm season herbaceous plants will continue with expanded and renewed work on ornamental sweet potatoes, lantana, angelonia, vinca, perennial verbena, graptophyllum, perilla, coleus, daylilies, buddleia, coneflower, rudbeckia, cannas, josephs coat, and many others.

Progress 10/01/06 to 09/30/11

Outputs
OUTPUTS: Research results from this project were presented to over 600 green industry audiences and approximately 50 consumer horticulture audiences. Efforts to dessiminate research information also included weekly ornamental horticulture e-mail updates, articles in Louisiana Agriculture magazine, articles in Louisiana Gardener magazine, LSU AgCenter press releases, field days and other educational events. Training and professional development was presented to LSU AgCenter county agents and clientele in the form of field days, workshop and farm/nursery visits. PARTICIPANTS: A.D. Owings (PI), R. Bracy, Y. Chen, R. Rosendale, J. Quebedeaux, LSU AgCenter; Partner organizations were Lousiana Nursery and Landscape Association, Louisiana Nursery and Landscape Foundation for Scholarship and Research, Windmill Nursery, Plant Development Services, Inc., Sakata Seed, Ball Horticulture, EuroAmerican Propagators, Bracy's Nursery, Country Pines Nursery, Transcend Nursery, and Louisiana Master Gardeners. TARGET AUDIENCES: Target audiences for this project include parish, regional and statewide appointed extension faculty. In addition, commercial ornamental horticulture clientele (retailers, landscapers, growers) are primary targets for infomation delivery, in addition to home garden, home ground and Louisiana master gardener audiences. There was also multi-state clientele served by this project, primarily in Mississippi, Alabama, Arkansas and Texas. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.

Impacts
Research from project has lead to plants being included in the Louisiana Super Plants program. The program identifies and promotes exceptional plants that perform well in Louisiana. University trials provided unbiased information for making plant selections. The Super Plants promotion doubled and tripled sales (based on actual sales figures) of herbaceous perennials. Sales of the Super Plant woody ornamentals increased over 40%. New and underutilized ornamental plants are being evaluated in landscape settings for performance under Louisiana's growing conditions. This work is being conducted in sun and shade garden trials in USDA Hardiness Zone 8B. Over 450 warm season annual bedding plant varieties, 50 warm season perennial cultivars, 10 rose cultivars and about 20 shrub cultivars were evaluated in the sun garden. Over 200 varieties of annual bedding plants were evaluated in shade situations each year. During the cool season, about 250 cultivars of annual bedding plants were tested in the sun garden setting. Home gardeners, retail consumers and green industry professionals have the opportunity several times each year to view the trials and rank plants for the seasonal "People's Choices" awards. Nursery growers aware of trial results have began producing several of these cultivars including `Carefree Marvel', `Carefree Celebration', `Julia Child' and `Drift" series roses. Bedding plants produced in larger volumes include `Amazon' dianthus, `Camelot' foxglove and several series of columbine. Growers and retailers have become more aware of plants in the Southern Living program - primarily the better performers, such as `Emerald Snow' loropetalum, `Delta Jazz' crape myrtle, `Spring Sonata' Indian hawthorn and `Purple Diamond, loropetalum. The top performing `Cleopatra' and `Super Blue' cultivars of liriope also are now common in the industry. Sales of plant cultivars being grown and sold by Louisiana's green industry professionals have increased due to LSU AgCenter communication.

Publications

  • Owings, Allen, Regina Bracy, Yan Chen, Roger Rosendale, Joey Quebedeaux. 2011. LSU AgCenter Landscape Horticulture People's Choice Awards 2010. Journal of the LA State Horticulture Society. Vol. 6: 25-26.
  • Bracy, Regina, Allen Owings and Dan Gill. 2011. Super Plants Boost Louisiana's Economy. Louisiana Agriculture. Vol. 54(3).
  • Owings, Allen, Regina Bracy and Ed Bush. 2011. Louisiana's Nursery and Landscape Industry Needs Bark and Forest Products. Louisiana Agriculture. Vol. 54(3).
  • Owings, Allen, Yan Chen, Regina Bracy and Roger Rosendale. 2011. LSU AgCenter People's Choice Landscape Award Winners - Spring 2010. Proceedings Southern Nursery Association Research Conference. Vol. 56:358-360.
  • Yan Chen, Regina P. Bracy, Allen D. Owings and Joey P. Quebedeaux, 2011. Controlled-release Fertilizer Type and Rate Affect Landscape Establishment of Seven Herbaceous Perennials. HortScience. Vol. 21:336-342.
  • Robbins, James, Ron Raney, Mengmeng Gu and Allen Owings. 2011. Rolling the Dice wth Specialty Cut Flowers. HortScience. Vol. 46(9): S17.
  • Owings, Allen. 2011. Using facebook to provide clientele horticultural information. 2011. HortScience Vol. 46(9); S16.
  • Chen Yan, Allen Owings and Regina Bracy. 2011. Fertilizer Regimes during Production Affect Coleus Growth and Quality in the Landscape. Proceedings Southern Nursery Association Research Conference. Vol. 56:322-327.
  • Chen, Yan, Richard Story, Roger Hinson and Allen Owings. 2011. Plant age and cultivar affect western flower thrip damage on impatiens. HortScience. Vol. 46(9): S18-19.
  • Owings, Allen, Regina Bracy, and Dan Gill. 2011. Louisiana Super Plants-A New Marketing and Promotion Program for Ornamental Plants. HortScience. Vol. 46(9): S141-142.
  • Chen, Yan, Regina Bracy, and Allen Owings. 2011. Effects of Flurprimidol and Fertilization on Growth Regulation of Knockoutr Rose in Landscapes. HortScience. Vol. 46(9): S265.
  • Owings, Allen. 2011. Best Performers from Cool Season Bedding Plant Landscape Trials. Journal of the LA State Horticulture Society. Vol. 6:1-2.
  • Gill, Dan, Allen Owings and Regina Bracy. 2011. Louisiana Super Plant Fall 2010 - Amazon Dianthus. Journal of the LA State Horticulture Society. Vol. 6: 3-4.
  • Owings, Allen. 2011. A Review of Newer Floribunda and Landscape Shrub Roses. 2011. Journal of the LA State Horticulture Society. Vol. 6: 7-8.
  • Gill, Dan, Allen Owings and Regina Bracy. 2011. Louisiana Super Plant Fall 2010 - Camelot Foxglove. Journal of the LA State Horticulture Society. Vol. 6: 12-13.
  • Owings, Allen. 2011. A Historical Listing of LSU AgCenter/LSU Horticulture Plant Releases. Journal of the LA State Horticulture Society. Vol. 6: 23-24.


Progress 01/01/10 to 12/31/10

Outputs
OUTPUTS: Research results from this project were presented to over 40 green industry audiences and approximately 40 consumer horticulture audiences. Efforts to dessiminate research information also includes weekly e-mail updates, articles in Louisiana Agriculture magazine, articles in Louisiana Gardener magazine, LSU AgCenter press releases, field days and other educational events. Training and professional development was presented to LSU AgCenter county agents and clientele in the form of field days, workshop and farm/nursery visits. PARTICIPANTS: Allen D. Owings, Professor, Hammond Research Station (principal investigator); Regina Bracy, Coordinator, Hammond Research Station (administrative support); Yan Chen, Associate Professor, Hammond Research Station (collaborator); Roger Rosendale, Research Associate, Hammond Research Station; Joey Quebedeaux, Research Associate, Hammond Research Station. Partner organizations were Louisiana Nursery and Landscape Association, Windmill Nursery, Plant Development Services, Inc., Sakata Seed, Ball Horticulture, EuroAmerican Propagators, Bracy's Nursery, Country Pines Nursery, the Louisiana Nursery and Landscape Foundation for Scholarship and Research, Transcend Nursery, Louisiana Master Gardeners and more. TARGET AUDIENCES: Target audiences for this project include parish, regional and statewide appointed extension faculty. In addition, commercial ornamental horticulture clientele (retailers, landscapers, growers) are primary targets for infomaiton delivery, in addition to consumer audiences. Green industry potential clientele in Louisiana numbers 56,000. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.

Impacts
Based on research results the following plants have been designated as Louisiana Super Plant winners - Amazon dianthus, Camelot foxglove, ShiShi Gashira camellia, Serena angelonia, Butterfly penta, Frostproof gardenia, Shoal Creek vitex, Swan columbine, Belinda's Dream rose, Babywing begonia, Senorita Rosalita cleome, Conversation Piece azalea, Southern sugar maple, evergreen sweetbay magnolia, Sorbet viola and Redbor ornamental kale. Initial blackspot observations on Griffith Buck roses found Carefee Beauty, Princess Verona and Prairie Princess being slightly susceptible. Pearlie Mae, Quietness and Summer Wind were highly susceptible to blackspot. Moderately blackspot susceptible Griffith Buck roses were Polonaise, Prairie Breeze, Prairie Harvest, Square Dancer, Winter Sunset, Amiga Mia, April Moon, Barn Dance, Country Dancer, Earth Song and Folksinger. Good landscape performers based on very initial observations of flowering and visual quality are April Moon, Dorcas, Music Maker, Piccolo Pete, Prairie Squire, Bright Melody, Kathy's Find, Aunt Honey, Countryman and Do-Si-Do. Green industry professionals named landscape plant winners for 2010 as: Gold Winner - Carefree Marvel rose, Silver Winner - Pinstripe petunia, Bronze Winner - Dark Secret heuchera and Black Velvet petunia. Other winners were: Amazon Neon Cherry dianthus, Illusion Midnight Lace ornamental sweet potato, Illusion Emerald Lace ornamental sweet potato, Redbor ornamental kale, Senorita Rosalita cleome, Amazon Neon Purple dianthus, Amazon Rose Magic dianthus, Julia Child rose Little Leaf tibouchina, and Jade Frost erygium. Top performing coleus cultivars were Henna, Indian Summer, Mint Mocha, Red Head and Trusty Rusty. Good landscape performers in new shrubs are Emerald Snow loropetalum, Delta Jazz crape myrtle, and Purple Pixie loropetalum.

Publications

  • Owings, Allen and C. Allen Broyles. 2010. Initial evaluation of Griffith Buck roses under Louisiana growing conditions. HortScience 45(4):494.
  • Bush, Edward, Daniel Wells, Steven Borst, Allen Owings and Jeff Beasley. 2010. Calcium and magnesium fertilizer sources for ericaceous nursery crops. HortScience 45(4):493.
  • Owings, Allen D. and Roger Hinson. 2010. "Nursery Crops" in 2010 OUtlook for Louisiana Agriculture. Louisiana State University Agricultural Center. Publication No. 3048(revised). April 2010. 68 pp.
  • Owings, Allen. 2010. Live oak care important. Journal of the La State Horticulture Society 5:1-2.
  • Owings, Allen, Regina Bracy, Yan Chen, Roger Rosendale. 2010. People's choice awards from the LSU AgCenter's Hammond Research Station Landscape Horticulture Field Day - 2009. 2010. Journal of the La State Horticulture Society 5:7-8.
  • Owings, Allen D. 2010. 'Razzle Dazzle' dwarf crape myrtles landscape trial - 2007 and 2008. Journal of the La State Horticulture Society 5:9-10.


Progress 01/01/09 to 12/31/09

Outputs
OUTPUTS: Research results for this project were presented to 35 audiences of green industry professionals and approximately 30 consumer horticulture groups. Efforts to disseminate research information also include a quarterly printed newsletter, weekly e-mail updates, articles in Louisiana Agriculture magazine, and news releases. Sustainable landscape news articles with research results are published weekly by the LSU AgCenter communications division. PARTICIPANTS: Allen D. Owings, professor, Hammond Research Station (principal investigator); Regina Bracy, Coordinator, Hammond Research Station (administrative support); Yan Chen, assistant professor Hammond Research Station (collaborative efforts on new research aspects of this project); C. Allen Broyles, research associate Burden Center (data collection and project maintenance); Roger Rosendale, research associate Hammond Research Station (project implementation and maintenance). Partner organizations were Louisiana Nursery and Landscape Association, Windmill Nursery, Plant Development Services, Inc., Ball Horticulture, Syngenta, Transcend Nursery, Country Pines Nursery, Sakata Seed, Louisiana Master Gardeners and others. Training and professional development was presented in the form of workshops, included focus agent training, attended by LSU AgCenter county agents and field days. TARGET AUDIENCES: Target audiences for this research include parish, regionally and statewide appointed extension faculty. In addition, commercial ornamental horticulture clientele (retailers, landscape contractors, wholesale growers) are primary targets for this research information, in addition to consumer audiences. Green industry potential clientele in Louisiana numbers 56,000. PROJECT MODIFICATIONS: Not relevant to this project.

Impacts
Knock Out rose research continued with Knock Out, Pink Knock Out, Blushing Knock Out, Double Knock Out and Double Pink Knock Out being identified as good landscape performers. Sunny Knock Out and Rainbow Knock Out have been identified as poor landscape performers with Rainbow Knock Out being moderately susceptible to blackspot. Above average landscape performers from Ball FloraPlant for 2009 were Trusty Rusty coleus, Red Head coleus, Aurora Black Cherry coleus, Cabaret Red Improved calibrachoa, Breathless Blush euphorbia, Breathless White euphorbia, Landmark Sunrise Rose Improved lantana, Silver Sun Spun petunia, Burgundy Sun Spun petunia, Red Sun Spun petunia, Lucky Pure Gold lantana, Blue Print scaevola, Suncather Burgundy petunia, Suncatcher Purple Rose petunia and Suncatcher Red petunia. Drift series roses evaluated showed highest visual quality ratings for Peach and Pink, but Cercospora leaf spot was present significantly on Peach and Coral. Top award winners in the People's Choice selections were Profusion Double Fire zinnia, Jade Princess pennisetum and Purple Flash ornamental pepper. Louisiana Super Plants named as a result of research included Amazon dianthus, Camelot foxglove, ShiShi Gashira camellia, Serena angelonia, Butterfly penta, Frostproof gardenia, Shoal Creek vitex, Swan columbine, Belinda's Dream Rose, Southern sugar maple and Redbor ornamental kale. Recommended shrubs for Louisiana based on landscape research results include Hot Flash camellia, Eleanor Tabor indian hawthorn, Spring Sonata indian hawthorn and Purple Diamond loropetalum. Swan series columbine evaluations showed minor bloom on Violet White, Burgundy and Lavender. The tallest Swan columbines were Yellow and Lavender. The shortest Swan columbines were Blue White and Pink Yellow. Plant to plant uniformity was above average for all Swan columbine varieties except Red White. In evaluation of Songbird columbines, Goldfinch has very little bloom. The Nightingale and Bunting Songbird columbine varieties were the tallest in the series with Cardinal Improved and Bluebird Improved being the shortest. Above average plant to plant uniformity was found in the Bluebird Improved, Bunting, Dove and Goldfinch varieties of columbine. Better performing Griffith Buck roses in landscape trials were April Moon, Dorcas, Piccolo Pete, Music Maker, Prairie Squire, Bright Melody, Do-Si-Do, Countryman, Aunt Honey and Kathy's Find. The data collected from this ornamental plant research trial effort currently, and in the future, leads to improved recommendations of plant material genera, species and cultivars suitable for Louisiana's growing conditions.

Publications

  • Chen, Yan, Regina Bracy and Allen Owings. 2009. Growth Regulation of Loropetalum and Azalea in Landscape Beds. Proc. Southern Nursery Assoc. Research Conf. 54:25-30.
  • Owings, Allen. 2009. Landscape Evaluation of Coleus Cultivars - 2008. Proc. Southern Nursery Assoc. Research Conf. 54:67-69.
  • Owings, Allen, Regina Bracy and Yan Chen. 2009. New Liriope Cultivars: Landscape Observations From 2008. Proc. Southern Nursery Assoc. Research Conf. 54:64-66.
  • Owings, Allen and C. Allen Broyles. 2009. Growing Roses A Challenge in Louisiana. Louisiana Agriculture. 52(1):26-27.
  • Owings, Allen. 2009. Ornamental Sweet Potato Options Continue to Expand. Louisiana Agriculture. 52(2):35.
  • Chen, Yan, Regina P. Bracy, Allen D. Owings, and Donald J. Merhaut. 2009. Nitrogen and Phosphorous Removal by Ornamental and Wetland Plants in a Greenhouse Recirculation Research System. HortScience. 44:1704-1711.
  • Owings, Allen and C. Allen Broyles. 2009. National EarthKind Rose Cultivar Trial in Louisiana: Blackspot Observations from 2007 and 2008. HortScience. 44(3):562.
  • Owings, Allen, Yan Chen and Regina Bracy. 2009. New Liriope Cultivar Evaluations in the Landscape. HortScience. 44(3):562-563.
  • Chen, Yan, Regina Bracy and Allen Owings. 2009. Growth Regulation of Loropetalum and Azalea in Landscape Beds. HortScience. 44(3):578.
  • Owings, Allen, Ed Bush and C. Allen Broyles. 2009. Landscape Performance of Razzle Dazzle Crape Myrtles. HortScience. 44(4):1033.
  • Bush, Edward, Jeffrey Beasley, Kathryn Fontenot and Allen Owings. 2009. Phytoremediation of New Orleans Soils Using Urban Horticulture Plants. HortScience. 44(4):1045.
  • Owings, Allen and Roger Hinson. 2009. "Nursery Crops" in 2009 Outlook for Louisiana's Agriculture. Louisiana State University Agricultural Center, Publication No. 3048, April 2009, 50 pp.


Progress 01/01/08 to 12/31/08

Outputs
OUTPUTS: Research results for this project were presented to twenty five audiences of green industry professionals and approximately thirty consumer horticulture groups. The data collected from this ornamental plant research trial effort currently, and in the future, leads to improved recommendations of plant material genera, species and cultivars suitable for Louisiana's growing conditions. Efforts to disseminate research information also involve a quarterly LSU AgCenter nursery and landscape printed newsletter mailed to 2500 green industry businesses in Louisiana. In addition, a weekly ornamental horticulture email update with research findings and recommendations is sent to 350 individuals. Sustainable landscape news articles with research results are published by the LSU AgCenter communications division on a weekly schedule. Three articles were published in Louisiana Agriculture magazine. PARTICIPANTS: Allen D. Owings, professor, Hammond Research Station (principal investigator); Regina Bracy, Coordinator, Hammond Research Station (administrative support); Yan Chen, assistant professor Hammond Research Station (collaborative efforts on new research aspects of this project); C. Allen Broyles, research associate Burden Center (data collection and project maintenance); Roger Rosendale, research associate Hammond Research Station (project implementation and maintenance). Partner organizations were Louisiana Nursery and Landscape Association, Windmill Nursery, Plant Development Services, Inc., Ball Horticulture, Syngenta, Transcend Nursery, Country Pines Nursery, Sakata Seed, Louisiana Master Gardeners and others. Training and professional development was presented in the form of workshops, included focus agent training, attended by LSU AgCenter county agents and field days. TARGET AUDIENCES: Target audiences for this research include parish, regionally and statewide appointed extension faculty. In addition, commercial ornamental horticulture clientele (retailers, landscape contractors, wholesale growers) are primary targets for this research information, in addition to consumer audiences. Green industry potential clientele in Louisiana numbers 56,000. PROJECT MODIFICATIONS: Not relevant to this project.

Impacts
Crape myrtle disease observations and landscape performance measurements have identified Cherry Dazzle and Raspberry Dazzle as the best cultivars of the Razzle Dazzle Series crape myrtles for Louisiana. Top performing coleus cultivars in landscape trials were Mint Mocha, Indian Summer, Henna, Red Hot Rio, Big Red Judy, Fishnet Stockings, Royal Glissade, Zen Moment, Lancelot, Pineapple Splash and Ruby Ruffles. Blackspot observations on new All America Rose Selection winners found Pink Promise to be the most susceptible, Cinco de Mayo to be moderately susceptible and Carefree Spirit to be slightly susceptible. Three new cannas from Hanna Canna Farm were evaluated in landscape settings with Yellow Primrose being the best performer. Blackspot evaluation of Knock Out rose cultivars found Knock Out Rainbow to be the most susceptible. Ball Horticulture outstanding performing cultivars in landscape trials were Henna coleus, Indian Summer coleus and Toucan Scarlet Shad purslane. Above average performers were Mint Mocha coleus, Calico and Purple Flash ornamental pepper, Mayan Gold tecoma, Zahara zinnias, Pacifica Burgundy and Pacifica White vinca, Toucan Yellow and Toucan Fuchsia purslane, Landmark Gold and Landmark Rose Glow Improved lantana and Lucky Pot of Gold and Lucky Lemon Cream lantana. In the national Earth Kind rose study, Knock Out, Blushing Knock Out, Pink Knock Out, The Fairy, Belinda's Dream and Folksinger were classified in the low end of slight susceptibility to blackspot. Classified in the upper end of slight susceptibility to blackspot were Seminole Wind, Square Dancer, Prairie Breeze, Princess Verona, Prairie Princess, Amiga Mia, April Moon, Barn Dance, Nearly Wild, Winter Sunset, Polonaise, Earth Song, Chuckles, Climbing New Dawn, and Carefree Beauty. Varieties moderately susceptible to blackspot were Carefree Wonder, Dublin Bay, Country Dancer, Flora Dora, Pearlie Mae, Penelope, Sea Foam and Prairie Harvest. Highly susceptible varieties were Quietness and Summer Wind. Carefree Celebration rose has been identified to have superior growth habit when compared to Carefree Sunshine and Carefree Marvel. Pink Marble photinia demonstrated no entomosporium susceptiblity. The new Profusion Double zinnias performed equal to the single flowered cultivars.

Publications

  • Owings, Allen D. and Yan Chen. Cannas: Cultivar Observations in 2007 Landscape Trials. HortScience 43(3):612.
  • Broussard, Catherine, Ed Bush and Allen Owings. 2008. Differences in Seasonal Landscape Performance of Liriope and Ophiopogons. HortScience 43(3):611.
  • Bush, Edward, Allen Owings and Kathryn Fontenot. 2008. Amending Recycled Hardwood Waste Products for Production of Acid Loving Nursery Plants. HortScience 43(3):611-612.
  • Owings, Allen D. 2008. Petunias: Summary of Recent Landscape Performance Observations. HortScience 43(3):612-613.
  • Owings, Allen D., Gordon E. Holcomb and C. Allen Broyles 2008. Vinca Series: Summary of Some Recent Landscape Performance Observations. Proc. Southern Nursery Assoc. Research Conf. Vol. 53.
  • Owings, Allen D., Gordon E. Holcomb, C. Allen Broyles, and Ann Gray. 2008. First Year Landscape Evaluation of 'Razzle Dazzle' Crape Myrtle Cultivars. Proc. Southern Nursery Assoc. Research Conf. Vol. 53.
  • Hinson, Roger, Allen Owings, John Black and Richard Harkess. 2008. Using MSBG to Generate Enterprise Budgets for Ornamental Crops. Proc. Southern Nursery Assoc. Research Conf. Vol. 53.
  • Owings, Allen, C. Allen Broyles, Yan Chen, Regina Bracy and Ann Gray. 2008. Landscape Performace of New Herbaceous Ornamentals. Louisiana Agriculture 51(3):24-25.
  • Owings, Allen D. 2008. Pot in Pot Nursery Production: In-Ground and Above-Ground Systems. In: Green Industry Risk Management Guide - 2008. Laurence Crane, Editor. National Crop Insurance Services, Overland Park, KS. p. 34-35.
  • Owings, Allen D. 2008. Optimizing Pesticide Performance. In: Green Industry Risk Management Guide - 2008. Laurence Crane, Editor. National Crop Insurance Services, Overland Park, KS. p. 93-94.
  • Owings, Allen. 2008. Louisiana State Tests Razzle Dazzle Crape Myrtles in Landscape. NM-PRO (Nursery Management and Production). June.
  • Fletcher, Jr. Bobby H., Allen D. Owings. 2008. Louisiana Yards and Neighborhoods. HortScience 43(4):1081.
  • Chen, Yan, Regina P. Bracy, and Allen D. Owings. 2008. Screening Native and Ornamental Plants for Nutrient Abatement in Urban Landscapes. HortScience 43(4):1295.
  • Owings, Allen D. 2008. LSU AgCenter Cool Season Herbaceous Landscape Plant Evaluations - Petunias, Violas, Pansies Top 2006/2007 List. J. La State Horticulture Society 3:83.
  • Owings, Allen D. 2008. New Liriopes Arriving on the Scene. J.La State Horticulture Society 3:86.
  • Owings, Allen D. 2008. Earth Kind Roses Being Studied in Louisiana. J. La State Horticulture Society 3:84-86.
  • Owings, Allen D. 2008. 'Plush' Series Petunias - Landscape Trial Results for Late Winter/Early Spring 2007. J. La State Horticulture Society 3:76-77.


Progress 01/01/07 to 12/31/07

Outputs
OUTPUTS: Research results from this project were presented to fifteen audiences of green industry professionals and approximately thirty consumer horticulture groups. The project generated seven outputs in the form of presentations at academic meetings. The data collected from this ornamental plant research trial effort currently, and in the future, leads to improved recommendations of plant material genera, species and cultivars suitable for Louisiana's growing conditions. PARTICIPANTS: Allen D. Owings, Hammond Research Station (principal investigator); Regina Bracy, Coordinator, Hammond Research Station (administrative support); Yan Chen, assistant professor at Hammond Research Station (collaborative efforts on new research aspects of this project); C. Allen Broyles, research associate at Burden Center (data collection and research project maintenance); Roger Rosendale, research associate at Hammond Research Station (research project maintenance); Gordon Holcomb, professor emeritus of plant pathology (disease data collection and consultation); Ann Gray, horticulture instructor, Southeastern Louisiana University (data collection and collaborative effort on projects). TARGET AUDIENCES: Target audiences for this research include parish, regionally and statewide appointed extension service faculty. In addition, commercial ornamental horticulture clientele (retailers, landscape contractors, wholesale growers) are primary targets for this research information, in addition to consumer audiences.

Impacts
An initial effort to evaluate landscape performance of canna cultivars and determine susceptibility to leaf roller damage was begun. This will impact home gardeners and commercial ornamental vendors and producers by providing specific information on cultivars with reduced maintenance requirements and minimum insecticide inputs. Petunia cultivars studied in landscape trials included the following series - Wave, Easy Wave, Tidal Wave, Shock Wave, Supercascade, Avalanche, Fantasy, Plush, Celebrity, Madness, Explorer and Ramblin. Wave, Easy Wave, Tidal Wave, Shock Wave, and Plush petunia series are now routinely recommended to LSU AgCenter consumer and commercial clientele while Explorer and Ramblin series are given some recommendation consideration. Daylily evaluation efforts have resulted in grouping of All-America daylily cultivars based on their susceptibility to daylily rust over a four year evaluation period. New knowledge pertaining to landscape performance of Earth Kind roses in a national trial effort and information on blackspot susceptibility and landscape performance of new landscape shrub roses has resulted in recommendations of certain cultivars and non-recommendations of other cultivars. Crape myrtle disease observations have identified the best performing of the Razzle Dazzle series.

Publications

  • Owings, Allen D. and Gordon E. Holcomb. 2007. Daylilies: rust and leaf streak continue to be major disease issues. Journal La. State Hort. Soc. Vol. 2:17-18.
  • Owings, Allen, C. Allen Broyles and Ann Gray. 2007. Landscape performance of recently released landscape shrub roses - initial observations. Proc. Southern Nursery Assoc. Res. Conf. Vol. 52.
  • Owings, Allen, C. Allen Broyles and Ann Gray. 2007. Landscape evaluation of pansy and viola cultivars - 2006/2007. Proc. Southern Nursery Assoc. Res. Conf. Vol. 52.
  • Owings, Allen, C. Allen Broyles and Ann Gray. 2007. Landscape evaluation of petunia cultivars - 2006/2007. Proc. Southern Nursery Assoc. Res. Conf. Vol. 52.
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  • Holcomb, G.E., Owings, A.D., and Broyles, C.A. 2007. Reaction of zinnia cultivars to bacterial leaf spot, 2006. Plant Disease Management Reports (online). Report 1:OT006. DOI:10.1094/PDMR01. The American Phytopathological Society, St. Paul, MN.
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