TPM/IPM Weekly Report

TPM/IPM Weekly Report for Arborists, Landscape Managers & Nursery Managers Commercial Horticulture May 17, 2013 In This Issue... - Conferences - Borer control - Ambrosia beetles - Japanese beetles - Scale updates - Leaffooted bug eggs - Sycamore anthracnose - Fire blight - Brown rot on cherries - Lilac borer - Spruce spider mites - Southern red mite - Four-lined plant bug - Frost damage - European pine sawfly - Euonymus leaf-notcher caterpillar - Eastern tent caterpillars - Japanese longhorned beetles - Eyespot gall on maple - Lady bird beetles Weed of the Week Plant of the Week Degree Days Phenology Announcements Integrated Pest Management for Commercial Horticulture ipmnet.umd.edu If you work for a commercial horticultural business in the area, you can report insect, disease, weed or cultural plant problems found in the landscape or nursery to sklick@umd.edu Coordinator Weekly IPM report: Stanton Gill, Extension Specialist, IPM for Nursery, Greenhouse and Managed Landscapes, sgill@umd.edu. 301-596-9413 (office) or 410-868-9400 (cell) Regular Contributors: Pest and Beneficial Insect Information: Stanton Gill and Paula Shrewsbury (Extension Specialists) Disease Information: Karen Rane (Plant Pathologist) and David Clement (Extension Specialist) Weed of the Week: Chuck Schuster (Extension Educator, Montgomery County) Cultural Information: Ginny Rosenkranz (Extension Educator, Wicomico/ Worcester/Somerset Counties) Fertility Management: Andrew Ristvey (Regional Specialist, Wye Research & Education Center) Design, Layout and Editing: Suzanne Klick (Technician, CMREC) Improving Your Diagnostic and Treatment Skills May 29, 2013Time: 4:30 p.m. to 8:30 p.m. A program on insect and disease identification and control and sprayer calibration and tree injection Location: Central Maryland Research and Education Center (CMREC) 11975 Homewood Road, Ellicott City, MD Sponsors: University of Maryland Extension and MD Arborist Association For registration information: http://www.mdarborist.com/ University of Maryland Extension Pesticide Recertification Conferences 18th Annual Procrastinator s Pest Management Conference Friday, June 7, 2013 from 7:30 AM to 4:00 PM Montgomery County Extension Office, Derwood, MD For more information: http://procrastinators18-eac2.eventbrite.com/ Eastern Shore Pest Management Conference Friday, June 14, 2013 from 7:30 AM to 4:00 PM (EDT) Wye Research and Education Center, Queenstown, MD For more inforamtion: Ginny Rosenkranz, 41-749-6141 ext 106

Azadirachtin- Can this Work as Well As Neonictinoids for Borers? From: Stanton Gill I received an email asking for the new low risk pesticides for caterpillar and borer control. Another email requested that we list materials that are alternatives to neonictinoids for insect control in the landscape. It is interesting that in Canada they have severely restricted the chemicals that can be used for insect control, creating a market for lower risk pesticides. The Canadian Forest Service has backed the development of a 5% Azadirachtin B marketed by BioForest Technology, Inc (one of the distributors for arborists in the US is Rainbow Tree Care) for tree injection that should satisfy the organic type customer. The product is called TreeAzin systemic insecticide. This is an organic systemic insecticide (OMRI listed) for control of tent caterpillars, gypsy moth, hemlock wooly adelgid, sawflies, and flatheaded borers including emerald ash borers. TreeAzin Systemic Insecticide is to be injected into trees to control insect pests using the EcoJect System, a medium pressure tree injection tool. In the United States, TreeAzin is registered by the Environmental Protection Agency (EPA Reg. No. 82996-1) for use against emerald ash borer, gypsy moth, hemlock woolly adelgid, elm leaf beetle, tent caterpillars, leafminers, spruce budworm, Jack pine budworm, and sawflies. Keep in mind this is designed to be applied using an injection system and not as a soil drench or basal trunk spray. The azadirachtin that is extracted from neem tree seeds acts as an insect growth regulator. The larvae or nymphs are prevented from completing development and die before they can go to the next instar (growth) stage. There are a couple of things to consider before you jump into using this product. It is expensive compared to many pesticides and its storage requirements are rather exacting. The product must be stored at 40 70 F and will last one year in storage. When you take it out to the field it is recommended that you pack the material in a cooler with ice packs to keep it cool. The formulation is very thick and when it is injected into trees it takes 30-60 minutes to be uptaken into the tree. They have an interesting looking large injection tube that provides pressure using a spring system. The claims of the manufacturers is that it provides 95% level of control of emerald ash borer. There is some testing of the product in the mid-west United States to evaluate its efficacy on EAB. We will update you as we receive summaries. Ambrosia Beetle Update The activity of Xylosandrus germanus and X. crassiusculus has been down for the last couple of weeks, but this week we are seeing an uptick in adults of Xylosandrus crassiusculus. If you have susceptible trees such as styrax and yellowwood, you might want to watch the trunks for wet areas or wood frass being expelled. If you see this activity you might want to consider an application of bifenthrin (Onyx) applied to the trunk. Japanese Beetles We examined turf areas in Westminster this weekend and we found mainly late instar white grubs, but no pupae yet. We expect a larger population of adult Japanese beetles this season. If you find pupation in your area or adult emergence please notify us at sgill@umd.edu. Thanks. Japanese beetle grub Photo: Jim Baker, North Carolina State University, Bugwood.org 2

Scale Updates This week we are receiving emails and calls reporting that soft scales are producing copious amounts of honeydew. Several species of soft scale females are getting ready to produce crawlers and just before they start laying eggs they draw up large quantities of plant fluids. Two of the most common soft scales being reported are lecanium scale and calico scale. They excrete the sugars which is the sticky, shiny honeydew that your customers are noticing on plant foliage or covering their desks and sidewalks. As the crawlers emerge and move out onto the foliage and small twigs, it would a good time to apply IGR (Insect Growth Regulators) such as Distance or Talus. Calico Scale and Lecanium Scale Todd Franklin, The Brickman Group, brought in two samples this week of soft scale that were swelling up rapidly. The one sample was honeylocust covered with calico scale. Marie Rojas, IPM Scout, is finding calico scale with eggs under covers on Cladrastis kentukea and Malus Calocarpa in Frederick County. Several other landscape managers are sending in pictures of this scale in the landscape this week. The females are swelling up as they become loaded with eggs. They have been feeding heavily and continue to feed while excreting large amounts of honeydew. The other sample was lecanium scale on English oak. The stem was thoroughly coated with females that are swelling up as the eggs are laid under the female cover. Lecanium scale is also being reported on redbuds in the Gaithersburg area and the scale is covering the stems of the plants. Trisha Marty, Thrive, found crawlers of lecanium scale on honeylocust in Reston, VA on May 15 (364 degree days). Control: A control method would be a basal trunk application of dinoterfuran (Safari or Transtect). The females will probably be finished laying eggs by the time the insecticide gets up into the plant, but once the crawlers move to the foliage they should pick up the insecticide as they feed and will be killed. Another method is to use one of the Insect Growth Regulators such as Distance or Talus when the crawlers emerge which should be in the next week or two in Central Maryland. Maskell Scale on Cryptomeria Dave Clement, HGIC, collected Maskell scale from a crypotomeria in College Park on May 15. We examined 10 females and found only 3rd instar females, no eggs yet. In a normal year we would have seen crawlers in early May, but with the cool weather, it is delaying egg laying and crawlers. Calico scale on honeylocust (top) and lecanium scale on English oak (bottom) Maskell scale on cryptomeria Indian Wax Scale on Ilex: Ten scale from a holly were sampled and there were two live females with eggs, two live females without eggs and six dead females with a lot of eggs under the cover on plants in Columbia on May 13 (260 degree days). 3

Japanese Maple Scale: Nancy Harding, UME, found females without eggs and no crawlers in the Layotnsville on May 14 (271 degree days). Marie Rojas, IPM Scout, reported that there were no eggs, only females of Japanese maple scale in Beallsville on May 14 (271). White Prunicola Scale: Nancy Harding, UME, found 94% of scales examined were females with eggs and there was still no sign of crawlers on Yoshino cherry on May 14 in Laytonsville (271 degree days). Juniper Scale: Debby Smith Fiola, IPM Consultant, found eggs on May 13 under juniper scale covers. Six of the fifteen scale covers flipped had eggs (40%). Three were parasitized (holes in cover, just a dried up skin under cover); Two were dead; the rest had no eggs yet. Another scout found minute cypress scale on Leyland cypress that had adults, no eggs visible yet in Gaithersburg. Monitoring: This scale is usually found on the leaf scales of small branches where they feed on the sap of the host plant. We are finding increasing numbers of this scale on Leyland cypress in Maryland. European Elm Scale John Shorb, John Shorb Landscaping, sent us photos of European elm scale. In May, females will form tough felted white fibers that will form a ring their oval-shaped bodies. The body of the insect is brown to blackish. Look for the yellow crawlers along veins on the undersides of leaves from now through fall. Heavy infestations of this scale will produce large amounts of honeydew. Control: Look for beneficial insects which can do a good job controlling this scale. If an insecticide application is necessary, treat with a soil drench of dinotefuran (Safari, Transtect) or imidacloprid (Merit in landscape, Marathon in the nursery) or make foliar applications of oil or Distance. Juniper scale Strange Egg Mass Mary Kay Malinoski, HGIC, found an unusual egg mass on juniper plants this week. It was an elongated, stick-shape with sections to it. It is a leaffootted bug egg mass. European elm scale Photo: John Shorb, John Shorb Landscaping Leaffooted bug eggs and adult 4

Sycamore Anthracnose Conditions have been perfect this spring for a severe outbreak of sycamore anthracnose, caused by the fungus Apiognomonia veneta (say that three times!). We have had many reports in the past of American sycamores (Platanus occidentalis) and London plane trees (a cross between American sycamore and Oriental plane tree with the scientific name Platanus x acerifolia) that show significant shoot blight and defoliation. This week, Marie Rojas, is reporting it on Platanus Bloodgood in Beallsville. The fungus overwinters in cankers from previous infections, and produces spores in the spring that are dispersed by rainfall to young developing shoots. Symptoms include shoot dieback and blighted areas on leaves that usually run along the veins. In addition to the amount of rainfall, the severity of the disease is affected by spring temperatures during bud break through leaf emergence. If the average daily temperature at this critical time is below 55F, anthracnose infections will be severe. If the average daily temperature is 60F or above during this time, disease incidence will be greatly reduced. Conditions were so favorable this spring that even London plane trees, which are reported to be resistant to sycamore anthracnose, are showing significant dieback. Remember, resistance does not mean immunity when environmental conditions are very favorable for the pathogen, some disease will develop in resistant plants. What can be done? At this point in time, nothing! Infections have already occurred, and the damage is done. Infected sycamores will develop new foliage later this spring to take the place of the initial growth lost to anthracnose, and temperatures will be warmer and therefore unfavorable for disease development on this new growth. Sanitation (raking fallen leaves and twigs, pruning out cankered branches back to healthy wood) can help to reduce the amount of reinfection. For high-value sycamores, there are a number of fungicides labeled for spray application, including thiophanate methyl (Cleary s 3336 and others), chlorothalonil (Daconil) and copper products (Kocide and others), but these must be applied before bud break in order to be effective, and large trees are difficult to treat in this manner. Arborists in our area have successfully controlled sycamore anthracnose using trunk injections of the systemic fungicide Arbotect 20S. Injections are performed in late summer (early September) when trees are in full leaf, and protection can last up to 3 years. Anthracnose Marie Rojas, IPM Scout, is reporting that anthracnose is also infecting Nandina domestica and Aucuba japonica. It is showing up on the newly expanding leaves (Nandina) and leaves and stem tips (Aucuba) in a landscape in Gaithersburg. Fire Blight Steve Sullivan reported fire blight on callery pear (probably a Cleveland Select ) in Howard County this week. Marie is also seeing a very bad infection of fire blight on Pyrus Korean Sun. Mangement: When we have some dry weather, prune several inches (at least 12 18 ) below the dieback section on the branches. Rainy weather spreads this bacterial disease. Fire blight on callery pear 5

Brown Rot on Cherries Brown rot has appeared once again in Maryland landscapes, causing flower blight and shoot dieback on flowering cherries, especially cv. Kwanzan. Brown rot is also a disease of peach and cherry grown for fruit production, and there are at least two species of the fungal pathogen Monilinia that can cause this disease. In Maryland landscapes we have been finding Monilinia laxa on symptomatic flowering cherries, but we are interested in collecting more samples of this disease from throughout the state to see if other species are present. If you suspect you have brown rot symptoms on flowering cherry, please send a few twigs with blighted leaves or shoot dieback to the UMD Plant Diagnostic Laboratory, 4112 Plant Sciences Building, College Park, MD 20742. Brown rot on cherry Initial symptoms of brown rot are browning and collapse of the blossoms followed closely by death of the small twigs. The symptoms look like fire blight, but cherries are not susceptible to that disease. If infected blossoms do not drop off, the fungus may grow through the flower stem (pedicel) and into the twig below. Twigs develop elliptical cankers with profuse gumming at the margin between diseased and healthy tissue. Leaves on these infected shoots turn brown and wither, but remain attached. In some instances, twigs are girdled and killed. During wet weather in May and June, the fungus sporulates on the surface of infected twig cankers. Cankers enlarge from season to season, and sporulation may continue on large cankers for 4 years or more. Visible presence of the pathogen is easy under wet conditions and appears as powdery tufts of brown gray spores that are visible on the outside of infected flowers, and on infected fruit or twig surfaces. Management of this disease in orchards depends on good sanitation and proper timing of protectant fungicides. In the landscape, management is more problematic. Pruning blighted shoots back to healthy tissue during dry weather may help, but this is difficult if large numbers of shoots are blighted. For specimen trees, fungicides such as chlorothalonil and propiconazole applied as foliar sprays starting when blossoms are first opening, may help protect trees from the blossom blight phase of the disease. Refer to product labels for rates and timing information. Lilac Borer A clearwing moth borer trap we have set out in Westminster pulled in the first lilac borer adults this year on May 11. Common lilac is in full bloom in this area. We usually see the adults emerge around 300 350 degree days. Control: The best protection for lilac is to do renewal pruning and keep vigorous young stems growing on the plant. Older growth tends to become infested with lilac borer. The stems can be protected with chemical applications of either bifenthrin (Onyx) or Permethrin (Astro). Lilac borer adult in trap 6

Spruce Spider Mites Marie Rojas is finding spruce spider mites on arborvitae in Beallsville and on Yoshino cryptomeria in Gaithersburg. Spruce spider mites are active during the cooler months of spring and fall. They cause stippling and yellowing of foliage. Bits of webbing can be seen between the needle and stems with high populations and needle drop can occur. Control: Horticultural oil can be applied to suffocate the eggs, and growth regulators such as Hexygon or TetraSan may be applied to early nymphs. Other options include Shuttle O, Avid, and Forbid. Southern Red Mites Southern red mites are the spider mites often found hollies. Dale Branch, John Shorb Landscaping, found these mites causing significant damage to compact Japanese holly in Washington, D.C.. Southern red mite is another mite that is more active in the cool weather of spring and fall. Monitoring: A tap test over white paper can show whether mites are present on the plant. Also look for signs of stippling and webbing on the foliage. Control: Horticultural oil, Hexygon, Floramite, Akari, or other labeled miticides.control: Horticultural oil, Hexygon, Floramite, Akari, or other labeled miticides. Southern mite damage on Japanese holly Photos: Dale Branch, John Shorb Landscaping Four-lined Plant Bug Four-lined plant bug immatures are active in landscapes on various herbs, including mint and lemon balm in Cabin John. Garden center customers might be asking about this damage on plants such as rudbeckia, mints, phlox, and coleus. This bug, however, can damage around 250 plant species, including some woody plants like dogwood, rose, azalea and forsythia. There is only one generation of this insect per year. Damage occurs early and plants grow out of it through the season. Monitoring: Look for white to dark colored spots on the foliage with plant damage concentrated on the upper foliage of the plant. The four-lined plant bug is a sucking insect that injects a toxin that discolors the foliage. Control: This pest is easily controlled by insecticidal soap or neem products. Acephate (Orthene) is also effective. 7 Four-lined plant bug adult and damage

Cold Nights On Sunday and Monday nights, the temperatures dipped into the low 30 F range and in some areas such as Frederick and Carroll Counties, the temperatures dropped below 32 F. You may notice tip dieback of some new growth on plant material from this last bit of cold weather. Generally, the damage will be seen on the tip growth. Marie Rojas reported cold injury on Nyssa sylvatica and noted the new tips looked like they were blowtorched! Other damaged plants included Cercis canadensis and C. canadensis Rising Sun, Cladrastis kentukea, Cephalotaxus harringtonia (flagging and purple-tinged tips), and Oxydendron arboreum in Frederick County. In Montgomery County, Marie found frost damage on new leaves of a variety of plants, including boxwood, Cladrastis kentukea, and Ilex Nellie Stevens. Jan Rieke in Damascus reported frost damage on grapes, raspberries, strawberries, blueberries, and peaches. Todd Armstrong, Davey Tree Experts, found frost damage on Nellie Stevens holly, blue holly, azaleas and hydrangea in Phoenix MD Steve Sullivan, The Brickman Group, had frost in Eldersburg. He covered a lot of plants, but still had some damage on plants including grapes, new growth on nandina, butterfly bush, hydrangea, Japanese painted fern, and hardy kiwi. Damage on Ilex Nellie Stevens Photo: Todd Armstrong, Davey Tree Experts Damage on hydrangea Photo: Steve Sullivan, The Brickman Group European Pine Sawfly Jan Rieke in Damascus reported a major attack of European pine sawfly larvae on pine last week and noted that there were hundreds of clusters. Look for gray green larvae on two and three needle pines. Control: There is only one generation per year and in most areas these sawflies are late instars at this point in time so it might not be worth applying any control measures. If larvae are still small, Conserve (spinosad) or Orthene (acephate) can be applied to foliage. You can also squish the larvae which works well or remove growth with clusters of larvae. European pine sawfly Photo: Louis-Michel Nageleisen, Département de la Santé des Forêts, Bugwood.org 8

Euonymus Leaf-notcher Caterpillar Damian Varga, Plant Scientific Service, reported euonymus leafnotcher caterpillar (Pryeria sinica) feeding on burning bush euonymus in Crownsville on May 14. The damage may look bad, but it is so early in the season that generally the euonymus plant recoups without suffering too much. There is one generation per year. The caterpillars are finishing up their feeding at this point and will be migrating around looking for places to pupate. Eastern Tent Caterpillars Damian Varga is also still finding larvae of eastern tent caterpillars on cherry laurel in Annapolis. This caterpillar is also finishing up its feeding for the season and is searching for places to pupate. Japanese Cedar Longhorned Beetle We are receiving reports of possible Japanese cedar longhorned beetle damage on arborvitae this week. Look for small oval exit holes (less than 0.25 inch) that are created by adults exiting the wood in the spring. Japanese cedar longhorned beetles Photo: Connecticut Agricultural Experiment Station Archive, Connecticut Agricultural Experiment Station, Bugwood.org Eyespot Gall (Acericeris ocellaris) Leaf galls are fairly common on trees such as maples. A gall is actually plant tissue that has developed as the result of feeding or other activity of insects or mites. Plant hormones are involved when the pest interferes with development of leaves in the spring. There are also galls caused by fungi, bacteria, and other organisms. This eyespot gall is caused by a cecidomyiid fly, Acericecis ocellaris. Trisha Marty, Thrive, Inc., and Richard Chaffin, The Eyespot gall on maple (left) and midges found inside (right) Photos: Trisha Marty, Thrive, Inc. Brickman Group, are finding this gall on maples this week. Once the gall appears on the leaf, there is no way to control it. Preventing most leaf galls is extremely difficult. However, other than being unsightly, most leaf galls are not harming the tree or shrub. 9

Beneficial Photo Todd Franklin, The Brickman Group, sent a photo of a lady bird beetle feeding on a colong of aphids on a plant in Laurel. Richard Chaffin, The Brickman Group, also sent in a photo of multicolored asian lady beetle larva feeding on eggs. Lady bird beetles are generalist predators and the eggs this one was feeding on turned out to be lady bird beetle eggs. Lady bird beetle adult feeding on aphids Photo: Todd Franklin, The Brickman Group Drift Issues and Weed Control, Chuck Schuster In an attempt to deal with many landscape and turf weed problems, professionals use a wide variety of products. Professionals are always concerned about drift, and many modifications have been made over the years to help decrease drift potential. Good applicators look at wind speed, nozzle type, discharge height, particle size, and pressure. Applicators have done a good job in reducing drift as is reflected in the number of complaints that MDA receives every year. Volatilization is another concern each applicator needs to review. This also is classified as a type of drift, but occurs after the product is applied, and the pesticide slowly evaporates into the air from the soil or plant tissue. This volatilization can occur days after application. This situation is no less problematic or dangerous than other forms of drift. Ester formulations are often more of a concern than amine formulations. Checking the label is very important. Checking the label for restrictions that might include statements be particularly careful within the drip line of trees and other ornamental species or Do not pour spray solutions near desirable plants is very important. The roots of trees are often farther from the trunk than the drip line of the crown, and application of chemicals to this area can potentially cause problems. This type of pesticide volatilization is potentially harmful to many desired trees and shrubs and can be avoided at the same time as control of weeds can be obtained. Read the label carefully to avoid any potential application issues. Distortion in the leaves is a potential indicator of some types of herbicide damage (left). Note leaves of oak tree (right) - the lower branches were small, distorted and in some cases falling from the branches; leaves at the top of the crown were normal sized. Photos: Chuck Schuster, UME 10

Plant of the Week, Ginny Rosenkranz Chionanthus retusus, Chinese fringe tree, is a small tree suitable for small courtyards, townhomes and small yards. It can be found as a single leader tree growing 20-40 feet tall or as a multi-branched shrub spreading out to 10-20 feet tall and wide. It is grown for the pure white fragrant flowers that cover the tree for a few weeks in mid-may through June and it blooms about two weeks before our native C. virginicus. The name, Chionanthus, is Latin for snow flower, an apt name as the entire plant is covered with white flowers.the fragrant flowers are composed of four thin petals that are one inch long and are held in clusters of many flowers about four inches long. Even though the plant is in full leaf when it flowers, the flowers are held at the ends of each branch, completely hiding the leaves while in bloom. Most plants are dioecious (separate female and male plants), but some have perfect flowers with both stigma and anthers. Male flowers are usually larger and showier while the female flowers can produce a cluster of olive-shaped blue-black fruit which does attract birds to the garden and gives another season of colorful interest with the tree. The bark is pale in color and peels off when young, but as the tree matures the bark has distinct ridges and furrows. The bright green 4-8 inch leaves have a pale underside and are arranged in an opposite fashion and can be entire or serrated. Fall color depends on cold temperatures, the warmer the areas the less color is formed in the leaves. Chinese fringe tree is cold hardy in USDA zones from 5-9 and prefers full sun to promote best flowering. They need moist, but well drained soils that are both acidic and fertile. Trees do not respond well to drought conditions. Mites and borers can be slightly problematic. Powdery mildew, leaf spot and cankers are the diseases that can affect the tree. Degree Days (As of May 16) Baltimore, MD (BWI) 325 College Park 465 Dulles Airport 364 Frostburg, MD 168 Martinsburg, WV 321 National Arboretum 465 Reagan National 465 Salisbury 432 11 Chionanthus retusus in bloom Photos: Charleen Miller To check degree day (DD) accumulations in your local area go to: http://www.weather.com/outdoors/agriculture/growing-degree-days/ USMD0100 Plant Phenology: What is in bloom PLANT PLANT STAGE (Bud with color, First bloom, Full bloom, First leaf) LOCATION Baptisia australis Purple Smoke Bud Ellicott City (May 13) Iris ensata (Japanese iris) First bloom Ellicott City (May 16) Iris pseudacorus (yellow flag) First bloom Ellicott City (May 16) Robinia pseudoacacia First bloom Bud College Park (May 14) Columbia (May 14) Tradescantia virginiana First bloom Ellicott City (May 15)

Upcoming Programs Improving Your Diagnostic and Treatment Skills: An Evening Seminar May 29, 2013 Location: CMREC, Ellicott City, MD Procrastinator s Pest Management Conference Friday, June 7, 2013 Location: Montgomery County Extension Office, Derwood, MD For more information: Chuck Schuster, 301-590-2807 or cfs@umd.edu To register: http://procrastinators18-eac2.eventbrite.com/ Eastern Shore Pest Management Conference Friday, June 14, 2013 Location: Wye Research and Education Center, Queenstown, MD For more information: Ginny Rosenkranz, 410-749- 6141, ext 106 MNLA Nursery Field Day June 20, 2013 Location: Waverly Farm, Adamstown, MD Contact: MNLA, 410-823-8684 The Maryland Christmas Tree Association (MCTA) Summer Christmas Tree Meeting June 22, 2013 Location: Jarrettsville Nurseries, 1121 Holy Cross Road, Street, Md 21154. Topics include: irrigation practices, field preparation, field tours, advanced shearing, fertilizer programs, pesticide and IPM. Agenda and registration: gavertreefarm@aol.com. Nutrient Management Plan Writing Nursery and Greenhouse Production July 10, 2013, 9 a.m. to 3:30 p.m. Location: CMREC, 11975 Homewood Road, Ellicott City, MD 21042 Contact: Andrew Ristvey, aristvey@umd.edu, 410-827-8056 x113 MDA Pesticide Container Recycling Program MDA is once again conducting a pesticide recycling program. For a list of dates and locations of collection sites, go to http://mda.maryland.gov/plants-pests/ Documents/recycle.pdf CONTRIBUTORS: Stanton Gill Extension Specialist sgill@umd.edu Paula Shrewsbury Extension Specialist pshrewsb@umd.edu Karen Rane Plant Pathologist rane@umd.edu Chuck Schuster Extension Educator cfs@umd.edu Ginny Rosenkranz Extension Educator rosnkrnz@umd.edu David Clement Plant Pathologist hgic.umd.edu Andrew Ristvey Extension Specialist aristvey@umd.edu Brian Clark Extension Educator bpclark@umd.edu Thank you to the Maryland Arborist Association, the Landscape Contractors Association of MD, D.C. and VA, the Maryland Nursery and Landscape Association, Professional Grounds Management Society, and FALCAN for your financial support in making these weekly reports possible. Photos are by Suzanne Klick or Stanton Gill unless stated otherwise. The information given herein is supplied with the understanding that no discrimination is intended and no endorsement by University of Maryland Extension is implied. University of Maryland Extension programs are open to all citizens without regard to race, color, gender, disability, religion, age, sexual orientation, marital or parental status, or national origin.