Leading up to the Great Pollinator Census we will be looking at the benefits of adding pollinator habitat to your school or community garden. Today we will look at milkweed.
Attracting Monarch butterflies to your garden involves including their larval host plant, milkweed or Asclepias, in your garden. Common milkweed (Asclepias tuberosa) is a popular milkweed with orange blossoms that frequently appears along roadsides. The beautiful plant also provides nectar to bees and other pollinators. Many gardeners feel that growing milkweed from seed is challenging and it can be. However, there are a few tips and tricks that can help you find success.
Common milkweed seeds need to be stratified before they will germinate. This means that they need a period of moist cold. In nature, it is easy to see how this is accomplished. Our winters provide the chill and the rain provides the moisture. You can mimic this process at home with a few easy steps.
First, purchase some clean sand from your local hardware or craft store. Craft or playground sand will work. Moisten the sand with water until you have a paste. You want damp sand, not wet sand.
Add your milkweed seeds and mix them in the moistened sand.
Put all of this in a plastic baggie or jar and label it with the date.
Place this in your refrigerator for thirty days. Mark on your calendar the date the seeds will be ready so that you don’t forget them. Once they have stratified they are ready for planting.
Lay the seeds across planting soil, not covering them. They need light to germinate. Use your greenhouse or home light set-up.
For more information on milkweed join us on the Georgia Pollinator Census Facebook group or on @gapollinators Instagram. This week we will be exploring milkweed types, ways to grow it, and how it benefits our pollinators. Leading up to the Great Georgia Pollinator Census we will be exploring all types of pollinators and pollinator habitats in our social media groups. This year’s Great Georgia Pollinator Census will be on August 21st and 22nd. You can find out more at the project website: GGaPC.org.
Guest post by Clint Waltz, Ph.D., University of Georgia Turfgrass Specialist. (Turfgrass Blog #4: 2019 Edition, June 10, 2019)
With the recent dry weather encouraging the use, and possible overuse, of irrigation systems then the recent tropical conditions – rainfall and humidity – I have had several pictures and questions about a jelly-like substance growing in the turf. The jelly-like “stuff” is a Nostoc algae,a genus of cyanobacterium formerly classified as blue-green algae. It has multiple common names like star jelly, witch’s butter, and others.
Under warm temperatures Nostoc may appear suddenly in lawns, and other turf areas, following a period of rain and can be an indication of overwatering. In turf, it is generally on a site where the grass is growing poorly due to severe compaction, overwatering, or both. It does not cause turf decline or death; it colonizes areas where it has favorable growing conditions and the grass was already thin. Poor drainage and compacted soils create a favorable environment for Nostoc. It will dry-out if the water or rainfall diminishes but it has only gone into dormancy. With enough moisture, it will come back to “life”.
In its hydrated, gelatinous, green state it can be a safety hazard. It is slippery. Be careful walking on it. However, when it dries-out it can become restrictive to turfgrass growth. Nostoc dries into a black crust that can prevent stolons from rooting, or “tacking”, into the soil, delaying turfgrass growth and spread.
Nostoc can be difficult to control. To discourage its growth, encourage the growth of the grass. Algae is less of an issue with an actively growing turfgrass canopy. The first step is to check the irrigation system to make sure it is watering properly (i.e. not too regular or too much). The turfgrass species we grow in Georgia perform better when grown on the slightly dry side, so scaling back the irrigation and adjusting the irrigation schedule will benefit the grass and can discourage the algae.
Improve internal soil and surface drainage. Core aeration opens the soil, allows oxygen into the root system, and reduces compaction. While allowing the soil surface to dry-out then breaking up the Nostic “crust” by scarifying the upper ¼- to ½-inch can break the algae into pieces and encourage its spread, it also permits the turfgrass stolons to root into thin areas and outcompete the Nostoc. With proper irrigation and core aerification the grass can cover and eventually predominate the area where the Nostoc was present.
For more information on Nostoc Algae, contact your local UGA Extension Agent at 1-800-ASK-UGA1, or click below to find your local office information.
Each spring, as the demand for landscape services swings into high gear, equipment theft escalates. Several members of the Georgia Green Industry Association and the Georgia Urban Ag Council report having their businesses hit with equipment theft. Criminals are stealing equipment in storage and on the job.
Here are some general equipment theft prevention strategies to consider:
Train employees on company procedures to deter equipment theft. In addition, discuss what to do in the event of a theft or robbery.
Take inventory: Establish routine equipment inventory. Keep documentation and photo records of serial numbers and models.
Parking strategy: Be strategic about where you park your vehicle on each jobsite or lunch destination. Park in well lighted locations visible to the work crew and avoid leaving equipment unattended in back lots or hidden areas that are conducive to theft. Position trailers so they aren’t easily accessed or swapped to another vehicle.
Reposition vehicles on large properties: Avoid leaving trucks far away from workers on large properties and keep trucks close.
Deterrents: Lock vehicles, trailers, trailer tongues, and secure equipment when unattended. Don’t leave keys in trucks or commercial mowers.
Security Cameras: If site has security cameras park where equipment can be seen by cameras. Install security cameras and sensor beams on storage areas.
Tracking Devices: Install tracking devices on large equipment.
Be Alert: Pay attention to suspicious activity.
Insurance: Review your policy and ask your insurance provider about theft prevention.
Communicate with local law enforcement about landscape equipment theft or suspicious activity in your area.
Professional organizations play an important role in helping to find solutions to the issues of equipment theft at worksites, offices, and storage facilities. Supporting these entities through membership and communication strengthens industry efforts to combat crime. The Georgia Urban Ag Council maintains a Twitter account titled “GA Landscape Thefts” to compile information, articles, and reports from owners and residents experiencing equipment theft. Armed with this data, the UAC hopes to assist law enforcement agencies, equipment manufacturers, and suppliers in determining a course of action to reduce losses.
Today we start our series on growing something new in the community garden. Have you tried growing peanuts? When I worked on a 4-acre farm garden we grew peanuts every year. The students visiting our garden LOVED peanut harvest. It is like a treasure hunt when peanuts are dug. Will there actually be nuts? How many will we get? Once the peanuts actually come out of the ground I would hear gasps. Really.
I think peanuts are a natural fit for a community garden. Commercially grown peanuts are grown in South Georgia where the soil is loose and sandy. Within the bounds of a community garden bed you can create that loose soil.
Peanuts are fascinating plants. The plant produces yellow flowers. After flowering the plant “pegs” by sending shoots back into the ground. The peanuts are formed then. The National Peanut Board has information on how peanuts grow.
To add to the peanut growing appeal, I have been involved in “peanut butter and jelly” gardens where we grew muscadines near the peanut beds. The Georgia Peanut Commission has an informative webpage including recipes.
I realize that if you work in a children’s garden you have to be mindful of peanut allergies, but if that is not a concern for you consider peanuts for your 2019 garden plot!
October means fall festivals and seasonal events across the state of Georgia. From Blue Ridge to Savannah, from Augusta to Columbus everyone is celebrating fall. What is your community garden doing to celebrate? This time of year is perfect for emphasizing the “community” in your garden. Some suggestions:
Host scarecrows in the garden! This is done with flair at the Atlanta Botanical Garden and the Research and Education Garden in Griffin. Why not your garden? Ask local businesses, civic groups or schools to create a scarecrow to exhibit. This could be a contest where visitors vote and a local celebrity awards the prize. For a twist have the exhibitors create/decorate crow birds which can perch with a spooky flair in the garden. Craft stores sell crow bird props at low prices, easy to decorate.
Season storytelling in the garden for all ages. Enlist some garden members or community leaders to lead a spooky storytelling event in the garden. Reading an Edgar Allen Poe story or poem dressed in period costume would create excitement for sure. If your garden is large enough you could station readers around the plots.
Have a pumpkin decorating contest. Even if your garden does not grow pumpkins you could purchase some from a church pumpkin sale. Or, you could use other vegetables. Have visitors decorate a pumpkin/vegetable and take the opportunity to educate community members about growing vegetables.
Celebrate with an open house. If your community already has a scarecrow exhibit or other events simply add an open house to be part of the larger town effort. An open house does not to be much work on your gardeners and would be an excellent opportunity to let your town know about your beautiful space.
Whatever you decide to do, enjoy the fall season! You’ve earned it!
Post authored by Paul J. Pugliesea and Shimat V. Josephb
aUGA County Extension Agent/Coordinator (Bartow County), Cartersville, GA bAssistant professor, Department of Entomology, University of Georgia – Griffin Campus.
Granulate ambrosia beetle, Xylosandrus crassiusculus (Mot.) [Previously known as the Asian ambrosia beetle]
Introduction: Granulate ambrosia beetle (Fig. 1) is a serious pest of woody trees and shrubs in Georgia. These tiny beetles were first detected in South Carolina in the 1970’s and have spread across the southeastern US.
Host plants: Woody ornamental nursery plants and fruit trees are commonly affected. In spring or even in late winter (around mid-February), a large number of beetles can emerge and attack tree species, especially when they are young. Some highly susceptible tree species include Styrax, dogwood, redbud, maple, ornamental cherry, Japanese maple, crepe myrtle, pecan, peach, plum, persimmon, golden rain tree, sweet gum, Shumard oak, Chinese elm, magnolia, fig, and azalea.
Biology: The female beetles land on the bark of woody trees. Then, they bore through the soft wood and vascular tissues (xylem vessels and phloem) of the tree. They settle in the heartwood and begin making galleries. Eggs are laid in these galleries. Adults introduce a symbiotic fungi into the galleries as a food source for the developing larvae.
Symptoms: The initial sign of infestation is presence of boring dust pushing out of the bark as “tooth picks” (Fig. 1). Severely infested trees with granulate ambrosia beetle may show symptoms of stunting, delayed leaf emergence in spring, and extensive defoliation.
Monitoring and management: Once adults of granulate ambrosia beetle bore through the bark, there are limited control options to mitigate the problem. Those settled beetles in the heartwood of the tree are less likely to be exposed to insecticides. Also, the beetles do not consume the wood, which further minimizes their pesticide exposure. Pyrethroid insecticides such as bifenthrin or permethrin can be used as preventative sprays to repel invading females. Thus, the insecticide-application timing becomes critically important for management. The insecticide applications can be timed with trap captures or adult activity. The simplest method to determine adult activity in the area is using alcohol and a bolt of wood (Fig. 2). A wood bolt (about 2 to 4-inches in diameter and 2-feet long) can be utilized. Any hardwood species such as maple will work for building traps. A half-inch diameter hole drilled at the center of the bolt, about a foot deep, is filled with alcohol and the opening can be closed using a stopper cork. Ethyl alcohol or grain alcohol with 95-percent alcohol content (190-proof) can be found at most liquor stores. Hang several bolt traps along the woodland border of a nursery at waist height to determine beetle emergence and activity. Sawdust tooth picks (Fig. 2) begin to appear on the bolt when they are infested with adult beetles. Once tooth picks are detected on a bolt trap, daily scouting should occur on nearby trees.
An immediate spray using a pyrethroid insecticide on nursery trees is warranted upon detection of tooth picks on the bolt trap. Be prepared and ready to act quickly as soon as beetle activity is confirmed. If practical, the entire nursery should initially be treated with an area-wide application to repel beetle activity. If individual trees are found to be infested, immediately destroy infested trees and follow up with targeted spray applications in blocks with beetle activity. Generally, pyrethroids are not effective for more than a week as their residues quickly breakdown. Re-application of the insecticide is generally required at weekly intervals until spring green-up is complete in areas where the beetle pressure is moderate to severe.
Healthy trees can withstand a low level of beetle infestation. Timely irrigation and adequate fertilization of trees throughout the growing season will increase a tree’s tolerance to beetle infestation. Closely monitor traps throughout the spring for a second emergence of ambrosia beetles. Ambrosia beetles can have multiple generations throughout the year and are strongly attracted to trees that are drought stressed, injured, or excessively pruned. Pay close attention to irrigation needs during extended summer and fall drought periods to minimize tree stresses. Avoid mechanical wounding of trees with maintenance equipment that could invite ambrosia beetles to attack.
When to deploy monitoring traps: The monitoring traps should be deployed starting the first week of February in Georgia because warmer periods during a mild winter may trigger early beetle emergence and infestation.
Rhizoctonia large patch is the most common and severe disease of warm season grasses (bermudagrass, centipedegrass, seashore paspalum, St. Augustinegrass, and zoysiagrass) across the state of Georgia. Due to spring and fall disease-promoting environmental conditions across Georgia coinciding with grasses leaving and/or entering dormancy, large patch can appear in warm season grasses in various grass-growing settings, including home lawns, landscapes, sports fields, golf courses, and sod farms. Symptoms of this lawn disease include irregularly-shaped weak or dead patches that are from 2 feet to up to 10 feet in diameter. Inside the patch, you can easily see brown sunken areas. On the edge of the patch, a bright yellow to orange halo is frequently associated with recently affected leaves and crowns. The fungus attacks the leaf sheaths near the thatch layer of the turfgrass.
Large patch disease is favored by:
Excess soil moisture and poor drainage.
Too much shade, which stresses turfgrass and increases moisture on turfgrass leaves and soil.
Early spring and late fall Nitrogen fertilization.
If large patch was diagnosed earlier, fall is the time to control it. There is a myriad of fungicides that can help to control the disease. Fungicides in the following classes are labeled for large patch control: carboxamides, benzimidazoles, carbamates, dicarboximides, DMI fungicides, di-nitro anilines, control. For a complete and updated list of fungicides available for commercial control of large patch, visit http://extension.uga.edu/publications/detail.cfm?number=SB28 or http://www.commodities.caes.uga.edu/turfgrass/georgiaturf/Publicat/1640_ Recommendations.html. Preventative or curatives (depending on the particular situation) rates of fungicides in late September or early October and repeating the application 28 days later are effective for control of large patch during fall. Fall applications may make treating in the spring unnecessary. Always follow label instructions, recommendations, restrictions and proper handling.
Cultural practices are very important in control. Without improving cultural practices, you may not achieve long term control.
Use low to moderate amounts of nitrogen, moderate amounts of phosphorous and moderate to high amounts of potash. Avoid applying nitrogen when the disease is active.
Avoid applying N fertilizer before May in Georgia. Early nitrogen applications (March-April) can encourage large patch.
Water timely and deeply (after midnight and before 10 AM). Avoid frequent light irrigation. Allow time during the day for the turf to dry before watering again.
Prune, thin or remove shrub and tree barriers that contribute to shade and poor air circulation. These can contribute to disease.
Reduce thatch if it is more than 1 inch thick.
Increase the height of cut. Reduced mowing heights result in a more dense turf stand, which may create a more favorable environment for large patch development
Improve the soil drainage of the turf.
Control traffic patterns to prevent severe compaction, and core aerate to improve soil drainage and increase air circulation around the shoots and root
Fall cultural practices and fungicide applications are key for Spring Dead Spot management. The disease is caused by fungi in the genus Ophiosphaerella (O. korrae, O. herpotricha and O. narmari). These fungi infect roots in the fall predisposing the turf to winter kill. As indicated by its name, initial symptoms of spring dead spot are noticeable in the spring, when turf resumes growth from its normal winter dormancy. As the turf ‘greens-up,’ circular patches of turf appear to remain dormant, roots, rhizomes and stolons are sparse and dark-colored (necrotic). No growth is observed within the patches. Recovery from the disease is very slow. The turf in affected patches is often dead; therefore, recovery occurs by spread of stolons inward into the patch. The causal agents of SDS are most active during cool and moist conditions in autumn and spring. Appearance of symptoms is correlated to freezing temperatures and periods of pathogen activity. Additionally, grass mortality can occur quickly after entering dormancy or may increase gradually during the course of the winter. Spring dead spot is typically more damaging on intensively managed turfgrass swards (such as bermudagrass greens) compared to low maintenance areas.
Practices that increase the cold hardiness of bermudagrass generally reduce the incidence of spring dead spot. Severity of the disease is increased by late-season applications of nitrogen during the previous fall.
Management strategies that increase bermudagrass cold tolerance such as applications of potassium in the fall prior to dormancy are thought to aid in the management of the disease. However, researchers have found that fall applications of potassium at high rates actually increased spring dead spot incidence. Therefore, application of excessive amounts of potassium or other nutrients, beyond what is required for optimal bermudagrass growth, is not recommended.
Excessive thatch favors the development of the disease. Therefore, thatch management is important for disease control,
Implement regular dethatching and aerification activities.
There are several fungicide labeled for spring dead spot control.
Timing, selection and application of fungicides are important for preventative management of SDS. Fungicide application in the fall when soil temperatures are between 60° and 80° F provides the best control of SDS
A complete list of fungicides, formulations and product updates for SDS can be found in the annual Georgia Pest Management Handbook and the Turfgrass Pest Control Recommendations for Professionals (http://www.georgiaturf.com). Some fungicide options are exclusively for golf course settings. Always check fungicide labels for specific instructions, restrictions, special rates, recommendations, follow-up applications and proper handling.
Severe leaf and crown rot, caused by Bipolaris ssp. can occur in bermudagrass lawns, sport fields, or golf fairways. Initial symptoms of this disease include brown to tan lesions on leaves. The lesions usually develop in late September or early October. Older leaves are most seriously affected. Under wet, overcast conditions, the fungus will begin to attack leaf sheaths, stolons and roots resulting in a dramatic loss of turf. Shade, poor drainage, reduced air circulation; high nitrogen fertility and low potassium levels favor the disease. To achieve acceptable control of leaf and crown rot, early detection (during the leaf spot stage) is a crucial.
Dollar spot is still active in the fall/early winter
Dollar spot is most prevalent during spring and fall with infections developing rapidly at temperatures between 60 and 75 degrees Fahrenheit combined with long periods of leaf wetness from dew, rain, or irrigation.
Excessive moisture on turfgrass foliage will promote dollar spot epidemics. Irrigating in the late afternoon or evening should be avoided, as this prolongs periods of leaf wetness.
If feasible, prune or remove trees and shrubs to promote air movement and accelerate drying of the turfgrass canopy
A variety of fungicides are available to professional turfgrass managers for dollar spot control including fungicides containing benzimidazoles, demethylation inhibitors
(DMI), carboximides, dicarboximides, dithiocarbamates, nitriles and dinitro-aniline. Several biological fungicides are now labeled for dollar spot control.
Warm-season vegetable planting time is almost here for most of Georgia. Here is your “to-do” list from UGA’s Vegetable Garden Calendar for this time of year:
Get rows ready for “warm-season” vegetables to be planted during the last week of March or first week or two of April as weather permits. Check your soil temperatures at georgiaweather.net.
You might want to risk planting out a few of the more tender crops and keeping them covered during bad weather.
Watch out for insects, especially cutworms, plant lice (aphids) and red spider mites.
Put down mulch between rows to control weeds.
Plant your choices of the following “warm-season” or “frost-tender” crops: beans (snap, pole and lima), cantaloupe, corn (sweet), cucumbers, eggplant, okra, field peas, peppers, squash, tomatoes and watermelon.
Plant tall-growing crops such as okra, pole beans and corn on the north side of other vegetables to avoid shading. Plant two or more rows of corn for better pollination.
Make a second planting within two to three weeks of the first planting of snap beans, corn and squash.
Within three to four weeks of the first planting, plant more lima beans and corn. Remember: for better pollination, plant at least two or more rows.
Be sure to plant enough vegetables for canning and freezing.
Cultivate to control weeds and grass, to break crusty soil and to provide aeration.
For the crops planted earlier, side-dress as described above.
Plant tender herbs.
Remember: Do not work in your garden when the foliage is wet to avoid spreading diseases from one plant to another.
Contact your local UGA Extension office if you need any help choosing varieties!
Dr. Clint Waltz, Extension Turfgrass Specialist with the University of Georgia, reports that hot temperatures and low rainfall in the fall of 2016 likely sent warm-season turfgrasses into winter dormancy with depleted carbohydrate reserves. During “normal” circumstances warm-season turfgrasses accumulate and store carbohydrates from late summer through early fall. Last year, non-irrigated turfgrasses likely suffered drought-induced dormancy and transitioned to winter a weakened condition. With insufficient energy accumulated in root systems, a thin canopy and a two- to four-week delay in the green-up of warm-season grasses might be common this spring.
What can be done to improve the green-up and growth of warm-season turfgrasses this spring?
1) AERIFICATION – Core aerification in late April to mid-May. This will improve air exchange and water infiltration to stimulate root and shoot growth. Performing hollow-tine aerification that removes 1/2 inch diameter soil cores to a 3 or 4 inch depth is the recommended approach.
2) TIMING OF FERTILIZER – Withhold the application of nitrogen fertilizer until soil temperatures at the 4-inch depth are consistently 65 degrees and rising. Visit www.Georgiaturf.com to find lawn calendars that include fertility recommendations for each species. Soil temperature data from the Georgia Automated Environmental Monitoring System can be found at www.Georgiaweather.net.
3) SOIL TESTING – Collect a soil sample and submit for testing to ensure that soil Ph, phosphorous, and potassium levels are within the recommended ranges for optimum growth. Contact your local UGA Extension Agent about submitting a soils sample to the UGA Agriculture and Environmental Services Laboratory or call 1-800-ASK-UGA1.
Restoring carbohydrate reserves this spring is an important step in preparing turfgrasses for a healthy growing season. Read the full article by Dr. Clint Waltz at www.Georgiaturf.com.