The 2019 Earth-Kind Landscape Short Course by Texas A&M AgriLife Extension Horticulture Sciences Program is a continuing education program designed for professionals responsible for managing and maintaining urban green space such as residential landscapes, parks, commercial properties and golf courses.
The course will also benefit municipal, schools, city personnel and landscape businesses, particularly those interested in developing sustainable urban landscape conservation programs.
Texas Master Gardeners earn CEUs for this course.
December 16 – 18, 2019
Texas A&M HortTREC
3199 CR 269 E.
Somerville, TX 77879
- Dr. Mike Arnold
- Dr. Gerald Bergner
- Ms. Wizzie Brown
- Dr. Becky Grubbs
- Dr. Mengmeng Gu
- Dr. Young-Ki Jo
- Dr. Mark Matocha
- Mr. Shea McLamore
- Ms. Laura Miller
- Dr. Genhua Niu
- Dr. Kevin Ong
- Dr. David Reed
The coneflower oddities pictured came from Sens Center Vegetable Demonstration Garden that the Bluebonnet Master Gardener Association manages in Bellville, Texas in June 2019. Our research shows that these plants are infected with Aster Yellows disease caused by phytoplasma. However interesting the effect, Aster Yellows is a serious garden disease impacting more than 300 plants species in 38 plant families.
The Texas Plant Disease Handbook lists the following as the most important impacted plants of Aster Yellows disease:
Crops: broccoli, buckwheat, cabbage, carrot, cauliflower, celery, endive, flax, lettuce, onion, parsley, potato, parsnip, pumpkin, red clover, salsify, spinach, strawberry and tomato.
Flowers: aster, anemone, calendula, Centaurea, China aster, chrysanthemum, Clarkia, cockscomb, Coreopsis, cosmos, delphinium, daisies, Gaillardia, hydrangea, marigold, Nemesia, Paris daisy, periwinkle, petunia, phylox, Scabiosa, snapdragon, statice, strawflower, veronica, and zinnia.
Weeds: cinquefoil, daisy fleabane, dandelion, horseweed, plantain, ragweed, thistle, wild carrot, and wild lettuce.
Yellows diseases are caused by phytoplasma. All known forms of these small, specialized bacteria cause plant disease. Phytoplasmas are naturally spread from plant to plant by sucking insects, particularly leafhoppers. The insects pick-up phytoplasma during their feeding on infected host plants, then spread the disease when they move to feed on other plants. The phytoplasma can overwinter in leafhoppers and on perennial host plants and will re-emerge in the Spring.
Phytoplasmas commonly cause distorted, dwarfed, and yellowish leaves and shoots often referred to as “yellows”. Other symptoms include abnormal flower and leaf development, shortened internodes, and shoot proliferation (known as “witches’ broom”). The flowers of infected plants sometimes develop green, leaflike structures as seen the coneflower photo from the Sens Center Demonstration Garden.
Aster Yellows wreaks havoc on all parts of the plant. There are no chemical or organic treatments known to cure, suppress or kill the disease so once plants become infected, they remain infected and are a host plant for further infection throught the garden. Failing to destroy the infected plant means it survives as a constant source of phytoplasma to be spread to other plants. Garden sanitation is key to managing the disease. Once the disease is discovered, all parts of the plant including the root system must be removed and destroyed. Although heat may kill the pathogen, it is best not compost diseased plants. As with all phytoplasmas, the Aster Yellows pathogen cannot survive outside of the plant so the bacteria will not remain in the soil.
An integrated pest and disease management approach including destroying infected plants immediately upon discovery of the disease, maintaining proper garden sanitation practices and attempts to control the leafhoppers is recommended. If you believe you have plants of any kind infected with Aster Yellows or a similar disease, contact the Texas Plant Disease Diagnostic Lab for information about diagnostic testing and recommendations for minimizing the spread of disease in your garden.
Web sources used for this post include: Texas Plant Disease Handbook, Texas Plant Disease Diagnosic Lab, Missouri Botanical Gardens, Ohio State Cornflower Clean-up, Wisconsin Horticulture Division of the University of Wisconsin – Madison.
Our 2020 Master Gardener Certification Training Class is scheduled each Thursday from January 16th – April 23rd with the final graduation class on Tuesday, April 28, 2020. Participatants from Austin, Colorado, Fayette & Washington Counties are welcome. The 64 hours of classes will be held at the Washington County Extension Sales Facility at 1305 East Bell Road, Brenham, Texas 77833 (use the Indepdance Rd entrance) , plus some field trips to be announced in class. The updated training manual compiled by the Texas Master Gardener Assocation, is inlcuded in the $175 registration fee. You may register online below or contact the Washington County Extension office at (979) 277-6262 for more information.
SAVE THE DATE
The Bluebonnet Master Gardener Assocation 2019 training classes begin January 17th in La Grange, Texas. The series consists of 50 hours of training held every Thursday until April 25th, 2019. Master Gardener Carol Daniels of La Grange is the coordinator of the 2019 training program. Ms. Daneils also coordinated the 2017 training class for BMGA. The class is designed for trainees from any of the four Bluebonnet Master Gardener counties of Austin, Colorado, Fayette and Washington. Texas A&M AgriLife Extension Service provides the training material used by Master Gardener programs statewide.
This is a unique opportunity for individuals who are interested in horticulture and serving their community. Master Gardeners are trained in all facets of horticulture such as plant & soil science, entomology, plant pathology, fruit and vegetable gardening, and much more. Upon completion of their training, Master Gardeners will be required to give at least 50 hours of volunteer service time in their local community in order to receive the title of “Master Gardener”.
Two Open House dates have been set for January 2019 for anyone interested in learning more about the program. These two events will provide a great opportunity to visit with current Master Gardeners, learn about projects in each of the counties, and enjoy a few Master Gardener goodies.
Training classes begin January 17th and will be held every Thursday through April 18th at the Fayette County Extension Office at 255 Svoboda Lane in La Grange from 8:30am-12:30pm. Final assesment and graduation will be held April 23. Applications are available at the Fayette County Extension Office. Class size will be limited, so to ensure your spot in the 2019 BMGA Training Class the application and payment of $175 must be turned into the Extension Office as soon as possible.
Come out and enjoy lots of wonderful refreshments and a chance to learn more about what all the Master Gardeners have to offer! For more information on the Master Gardener program, contact the Extension office at (979) 968-5831.
The members of Texas A&M AgriLife will provide equal opportunities in programs and employment to all persons regardless of race, color, sex, religion, national origin, age, disability, genetic information, veteran status, sexual orientation, or gender identity and will strive to achieve full and equal employment opportunity throughout Texas A&M AgriLife.
The Texas A&M University System, U.S. Department of Agriculture, and the County Commissioners Courts of Texas Cooperating.
Individuals with disabilities who require an auxiliary aid, service or accommodation in order to participate in this meeting are encouraged to contact the Fayette County Extension Office at (979)968-5831 seven work days prior to the meeting to determine how reasonable accommodations can be made.
BMGA members Faye Beery and Carolyn Woodruff completed the two-day First Detector Training June 11-12, 2018 in Angleton. The Master Gardener Specialist First Detector-Plant Disease training course introduces participants to the National Plant Diagnostic Network’s effort to protect US agriculture and plants through awareness information of invasive, non-native pests and pathogens. Trainees learn basic plant disease diagnostic skills and symptom documentation skills. The ultimate goal of the training is to provide these trainees, all of whom are already certified Texas Master Gardeners, with expertise to assist Texas A&M AgriLife Extension Service with early detection of invasive and exotic pathogens & pests. This year’s class was sponsored by the Texas Plant Disease Diagnostic Laboratory, the Brazoria County Master Gardener Association and Texas A&M AgriLife Extension Service of Brazoria County.
While the classroom part of their training is complete, to obtain the First Detector Specialist designation recognized by the Texas Master Gardener Association, Ms. Beery and Ms. Woodruff must complete 20 hours of field work assessing citrus and palm plants for pathogens. If you have citrus or palm in your gardens, be sure to contact Ms. Berry or Ms. Woodruff to conduct an assessment of your plants for invasive, non-native pests and pathogens. Their completed assessments and information forms will be submitted to the Plant Disease Clinic for Dr. Kevin Ong’s approval. Additionally, Ms. Beery and Ms. Woodruff are equipment with photos and other information to use educating the public through presentations to interested groups, clubs and societies.