for Arborists, Landscape Managers & Nursery Managers

Commercial Horticulture May 10, 2013Coordinator 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)

In This Issue...

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

TPM/IPM Weekly Report

- Conferences- Fall cankerworms- Emerald ash borer- Azalea lace bug- Potato leafhoppers- Euonymus scale- Cottony camellia taxus scale- Cottony cushion scale- UME scale monitoring- American holly leaf drop- Boxwood psyllid- Anthracnose- Periodical cicada- Boxwood leafminer- Brown marmorated stink bug- Hooktip caterpillar- Cold weather and plant fertility- European lecanium scale- Carpenter bees- Aphids- Eastern tent caterpillars- Plum curculio- Lady bird beetles

Beneficial of the WeekWeed of the WeekPlant of the WeekDegree DaysPhenologyAnnouncements

Integrated Pest Management for

Commercial Horticulture

ipmnet.umd.edu

Improving Your Diagnostic and Treatment SkillsMay 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 ConferenceFriday, June 7, 2013 from 7:30 AM to 4:00 PM Montgomery County Extension Office, Derwood, MDFor more information: http://procrastinators18-eac2.eventbrite.com/

Eastern Shore Pest Management ConferenceFriday, June 14, 2013 from 7:30 AM to 4:00 PM (EDT)Wye Research and Education Center, Queenstown, MDFor more inforamtion: Ginny Rosenkranz, 41-749-6141 ext 106

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More on the Fall Cankerworms in St. Mary’s and Charles CountiesLast week, we reported that fall cankerworms, Alsophila pometaria, were very active in St. Mary’s and Charles Counties. Ben Beale, Extension Educator in Southern Maryland, sent pictures of the caterpillar and the major defoliation in his area. As mentioned last week, usually the native pest outbreaks, then the predators and parasites collapse the population within a year or so. Ben pointed out that this was the second year they have seen this major defoliation of oaks and other hardwood trees. His concern is that the trees

News Release from the Maryland Department of AgricultureCONTACT: Vanessa Orlando, 410-841-5889

Cankerworms Causing Defoliation in Southern Maryland Trees; Most Affected Trees Expected to Recover Fully

ANNAPOLIS, MD (May 06, 2013) – An infestation of spring cankerworms have eaten the leaves off of many trees in Prince George’s, Charles and St. Mary’s Counties; however, entomologists with the Maryland Department of Agriculture (MDA) expect most trees to survive the defoliation without difficulty. “These green caterpillars are often mistaken for the much more destructive gypsy moth,” said MDA Forest Pest Management Program Manager Bob Tatman, “Their presence, coupled with the obvious defoliation, has led some local residents to express concern about what’s going on. Trees experiencing defoliation due to cankerworms usually recover completely if they are not otherwise stressed.”

Cankerworms are native insects that have exhibited small one- or two-year outbreaks around Maryland, the last one was in 2007 in Anne Arundel and Cecil Counties. The outbreaks are difficult to predict and more likely to be gone after the second year than to persist. Residents who are concerned about the cankerworm’s impact on high-value trees may want to consider insecticide treatment by a licensed pesticide applicator. In addition, watering and fertilizing may also help keep trees healthy.

List of licensed pesticide applicators near you: http://mda.maryland.gov/plants-pests/Pages/pesticide_db.aspx

Difference between gypsy moths and cankerworms: http://mda.maryland.gov/plants-pests/Pages/fall_and_spring_cankerworm.aspx

For more info on Maryland Forest Pest Management: http://mda.maryland.gov/plants-pests/Pages/forest_pest_management.aspx. Or call (410) 841-5922.

Fall cankerworm damage and larvaePhotos: Ben Beale, UME

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Potato leafhopper stagesIllustration: Art Cushman, USDA Systematics Entomology Laboratory, Bugwood.org

Azalea Lace BugAzalea lace bug nymphs were found on azaleas in Olney on May 4. Look for yellow stippling of new foliage on azaleas. Look on the underside of foliage for nymphs, adults, and black fecal spots. Azalea lace bug populations tend to be highest when plants are grown in full sun and the damage can be more severe at these sites. Control: Systemic drenches of imidacloprid or dinotefuran can be used. Be sure to apply contact sprays such as horticultural soap and oil to the undersides of the leaves.

Nurseries: Time to Monitor For Potato LeafhoppersWith the last rain, new growth is flushing out on the red maples. Check new foliage for potato leafhoppers. Many growers have been using permethrin, bifenthrin or acephate applications for control. Azatrol (labeled for maples and leafhoppers) and Neemix (neem) products are reported to give fairly long periods of control. These two products are insect growth regulators so they will work on the nymphs, not the adults. Conserve (spinosad) is also labeled for potato leafhoppers and has a reduced impact on beneficial insects and mites, but it is slightly expensive.

If maples have a second flush of growth in late June to July you may need to monitor the tip growth closely for leafhoppers and decide if you need another application. Alfalfa fields are highly attractive to potato leafhoppers and it has been observed that when an alfalfa field is cut, the potato leafhoppers migrate to a new host – one of which is red maple.

Emerald Ash Borer (EAB) UpdateEAB is in the pupal stage at this time. Adult activity begins when black locust is in full bloom. Black locust is just starting to produce flowers in some of the warmer areas of the region.

would be weakened and susceptible to secondary pests. If a tree is defoliated for 2 to 3 years in a row it can be susceptible to secondary borer attack and valuable trees may need to have the trunk protected from borers. The fall cankerworm caterpillars are light green and some are dark brownish-green. The light green caterpillars have white lines running down their body from the head to the tip of the abdomen. The dark brownish-green caterpillars have a black stripe the length of their back. Generally, when more dark-colored caterpillars are seen, it may be a sign of a heavy infestation. Ben is reporting a rather heavy population active in their area. He said that several people reported caterpillars covering the sides of their houses. Richard Chaffin, The Brickman Group, reported fall cankerworm (green phase) feeding maple foliage in Maryland this week as well.

When populations build up it can cause alarming amounts of defoliation, but it is so early in the year the trees generally recover without control being applied. Nothing more alarming to homeowners than to see floating caterpillars suspended from trees or masses of caterpillars covering their houses. Ben mentioned that some desperate people were considering spraying their houses with insecticides. He was able to talk most of them out of this ridiculous action.

Azalea lace bug damage on azaleaPhoto: Pest and Diseases Image Library, Bugwood.org

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Euonymus ScaleMarty Adams, Bartlett Tree Experts, brought in a sample of Pachysandra terminalis infested with euonymus scale from Cockeysville on May 8. Dead and live females were present under the covers, but there was no sign of the crawlers. There is a crawler generation from May to early June and a second crawler generation in August and September.Control: A mixture of 1% horticultural oil and pyriproxyfen (Distance) or buprofezin (Talus) does controls this scale. A soil drench of dinotefuran (Safari, Transtect) also works well.

Univeristy of Maryland Extension Scale Monitoring for 2013• White prunicola scale on Yoshino cherry on May 7 in Laytonsville (203 degree days) - found 85% of scales

examined were females with eggs. No sign of crawlers yet.• Japanese maple scale on May 7 in Laytonsville - found high percentage of females with no eggs.• Indian wax scale on May 6 in Columbia (190 degree days) - found 57% females with no eggs, 43% females

with eggs; no sign of crawlers• Juniper scale in Keedysville - found adult females, but no eggs

Euonymus scale (males are white and females are brown) on pachysandra

Cottony Camellia Taxus ScaleDamian Varga, Plant Scientific Service, reported cottony camellia scale crawlers on Burford holly in Catonsville on May 6. Norm Brady, Bartlett Tree Experts, reported adults, some producing eggs, of this scale on Ilex x ‘Nellie R Stevens’ in Princess Anne on the Eastern Shore on May 8. Norm noted that the lower trunk and branches of one of the trees was coated with Japanese maple scale (JMS). He is seeing JMS on other hollies including ‘Nellie R Stevens’ hollies, Chinese hollies, blue hollies, Ilex crenata ‘Helleri’, but the populations are smaller. He noted that he has seen very little JMS on Ilex opaca so far.Monitoring: Hosts of cottony camellia taxus scale include yews, camellia, rhododendron, Japanese maple, and mulberry. Look for yellowing of foliage and plant dieback in severe infestations. This soft scale produces large amounts of honeydew on which sooty mold will grow. The scale tends to accumulate on the undersides of foliage. There is one generation a year, but each female can produce over 1000 eggs so populations can build up quickly. Control: Wait for eggs to hatch and then treat with pyriproxyfen (Distance) or buprofezin (Talus) mixed with 0.5 - 1% horticultural oil.

Cottony camellia taxus scale - females with some producing the white egg sacs

Cottony Cushion ScaleDamian Varga, Plant Scientific Service, reported cottony cushion scale adults on heavenly bamboo in Glenwood on May 9. This large scale attacks a wide range of woody and herbaceous plants. There are multiple, overlapping generations per year. After hatching the crawlers move to the foliage. This scale is mobile in all life stages and the scale will migrate back to stems and the trunk during the winter just before foliage drops in the fall. Control: Soil application of imidacloprid (Merit in the landscape and Marathon in the nursery) or dinotefuran (Safari, Transtect) should give good control. Another option is to apply pyriproxyfen (Distance) or buprofezin (Talus) to mobile stages during the summer months.

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Sycamore anthracnose on London planetree in Prince George’s CountyPhoto: Steve Sullivan, The Brickman Group

Boxwood psyllids and damage

Anthracnose in Shade TreesSpring is the season for anthracnose diseases in shade trees. This week, we have received multiple reports of sycamore anthracnose. Anthracnose diseases are caused by a group of related fungi that induce similar leaf lesions and/or twig dieback on a number of woody plants, and are common on sycamore, white oak, maple, ash, walnut and dogwood. Each tree species is infected by a specific anthracnose fungus, so the disease does not spread between different types of trees. All anthracnose diseases are favored by cool, wet spring weather, so it may seem as if the disease is spreading through entire landscapes.

The characteristic symptoms of anthracnose diseases are brown or tan lesions that are commonly found along leaf veins. Several lesions may coalesce and kill the entire leaf.Young leaves become distorted as healthy areas of the leaf continue to grow and expand around dead areas. Trees may lose a large number of leaves in the spring or early summer when weather conditions are optimum for disease development. A second flush of growth results in new Anthracnose symptoms on sycamore foliage to replace leaves lost to anthracnose, and by mid summer trees appear normal. With sycamore anthracnose, the infection moves from leaves into small twigs, causing cankers and twig dieback. This disease is responsible for the angular branching pattern of the species.

Management strategies: Although disease symptoms can be very noticeable, anthracnose rarely has a negative impact on the health of mature trees. Maintaining the health and vigor of commonly infected trees through cultural practices (irrigation during dry weather, avoiding root injury from construction, etc.) is important in managing the disease. Prune dead twigs during the winter or dry summer months. Mature trees can be thinned for better air circulation throughout the canopy, decreasing leaf wetness and thereby reducing fungal infection. Rake and remove infected leaves in the fall and plant resistant varieties when available. Oriental plane and certain cultivars of London plane (e.g. ‘Liberty’ and ‘Columbia’) are more resistant than American sycamore.

Boxwood PsyllidCarol Allen reported that boxwood psyllids were active on May 6 on English boxwood in Kensington. Steve Sullivan, The Brickman Group, also found psyllids active recently. The boxwood psyl-lid causes tip growth to cup and curl. Often, damage is not severe enough to warrant control.

American Holly – Looking Bad, But Getting BetterWe have received several calls and emails saying American hollies are almost completely defoliated in several locations this spring. Three weeks ago we put out an announcement that American holly had a lot of foliar leaf spotting from several different secondary leafspot fungi on foliage. Since then, many of the American hollies dropped their foliage – often making the trees look denuded. The rain this week is helping push out new growth and the American hollies will rapidly fill in with new growth. Your customers may be upset and want you to “spray” something, but you really do not have to do anything. Cleaning up old foliage would be the best action you can take.

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Periodical cicada that emerged in Leesburg, Virginia

Hooktip moth caterpillarPhoto: Todd Franklin, The Brickman Group

Brown Marmorated Stink BugsWe are seeing adults very active in houses this week. Adults should be moving outside at this point and laying eggs on plant material. Look for the eggs clusters over the next few weeks.

An Interesting CaterpillarTodd Franklin, The Brickman Group, sent in a photo of a caterpillar found on a viburnum in Laurel. Dave Shetler, Ohio State University, identified it as the hooktip moth larva and with the host, he noted that it’s most likely one of the color morphs (usually brown or grey) of Oreta rosea.

Periodical Cicada, Brood IIThere has been a lot of press coverage over the last few weeks on the return of periodcal cicadas. The media is not making it clear that it is Brood II which, in Maryland, will only show up in certain areas. Periodical cicadas emerge in different geographical areas and these emergence groups are labeled as “Broods.” The one we experienced in 2004 in most of Maryland was “Brood X”. In most areas of Maryland you will not see these Brood II cicadas, but if you have customers in Virginia, Pennsylvania, North Carolina, New Jersey, and New York they will be seeing activity of Brood II. As Gaye Williams, MDA, noted for Maryland “they will be on the heel of Charles, toe of St. Mary’s, little tiny bit of PG, and the bottom piece of Calvert”. We have received photos from Craig Greco, Yardbirds, Inc, that some periodical cicadas were emerging in Leesburg, Virginia as of May 8.

Boxwood LeafminerRich Aancker, A & A Tree Experts, Inc., reported that boxwood leafminer adults were active in Baltimore County on May 9.Control: Systemic insecticides such as imidacloprid should provide 2 – 3 years of control of this pest. Applications of dinotefuran should provide one season of control and is uptaken into the plant faster than imidacloprid. If you are on a budget an application of a synthetic pyrethroid such as bifenthrin or permethrin will kill adults, but it will also kill many beneficial organisms in the process.

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Cold Weather Getting You Down? From: Andrew Ristvey, Wye Research and Education CenterIt is possible your fertilizer might also feel the same way. If you have been experiencing slow growth or your plant leaves seem a little discolored and chlorotic, it may be due to your slow release fertilizer not releasing, especially if you have top dressed this winter. Most slow-release fertilizers (sometimes called controlled-release even though there is nothing controlled about them), are activated by heat. The higher the temperatures to which they are exposed, the faster they will release. Since this spring has been consistently cool, they may not be releasing as fast as the plants need, creating a potential for nutrient deficits.

For those plants you need to sell soon, corrective actions would be to give a shot of soluble fertilizer to the plants and wait one to two weeks for recovery. If you do not need to move plants soon, hold off for warmer weather in the next week.

Of course, by the time the hot weather comes, those fertilizers will be releasing quite quickly…so keep monitoring! Monitor for electrical conductivity by pour through or saturated media extract. Look for ranges between .5 and 2.0 dS/m (taking account of your irrigation water EC) for both monitoring methods. With anything higher than 2.5 dS/m, you should be irrigating.

For more information, please contact Andrew Ristvey at 410-827-8056 x 113

Rose with chlorotic foliagePhoto: Andrew Ristvey, UME

European lecanium scalePhoto: Jeanne Kavinski, Montgomery County Parks

European Lecanium ScaleJeanne Kavinski, MNCPPC - Montgomery County Parks, sent in a photo of European lecanium scale swelling up on willow oak. It is a soft scale that will be going to crawler very soon. Control: Apply either Distance or Talus as foliar spray or soil injection of imidacloprid or basal trunk spray of dinotefuran (Transtex or Safari).

Carpenter BeesBrian Clark, UME-Prince George’s County, sent an email regarding carpenter bees to note that steel wool is prone to rust and fall out. He suggests using a copper mesh instead (Stuff-it or copper pot scrubbers) in the holes. He mentioned “Carbaryl (Sevin) has a label for bees, and I recommend that product. It doesn’t agitate the bees like synthetic pyrethroids and is highly toxic against bees. Considering you will be applying it to a structure, pollinators are unlikely to be affected.”

AphidsAphids are active on a variety of plants in the spring. Steve Sullivan, The Brickman Group, is finding them on burning bush euonymus and noted that it distorts the ends of the new growth. Todd Franklin, The Brickman Group, is finding aphids on viburnum in Laurel. Check for predators such as syrphid fly larvae before deciding whether it is necessary to treat for aphids.

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ETC tent in D.C. on May 10Photo: John Shorb, John Shorb Landscaping

ETC tents on wild cherry in Owings MillsPhoto: Mark Schlossberg, ProLawn Plus, Inc.

Lady Bird Beetle ActivityRoger Carmack, Capitol LLC, sent in photos of the multi-colored Asian ladybird beetles covering a white wall. This insect is the sort of bug you want hanging out around a building. This lady bird beetle larvae and adults feed on scales and aphids in trees and large shrubs. In his picture the adults are hanging out on a sunny white wall. Just like other animals they like to hang out in the sunshine in the spring.

Eastern Tent Caterpillars (ETC)

Plum CurculioPlub curculio is active on fruit this week, so if you have customers with fruit trees, treat with an insecticide such as Imidan.

Lady bird beetles on wallPhotos: Roger Carmack, Capitol, LLC

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Problematic Plant of the Week, Chuck SchusterCanada thistle (Cirsium arvense) is currently peeking out above many grasses and shrubs in the area. Canada thistle is a creeping perennial that reproduces by seed and rhizomes. It is frequently found in patches because of its horizontal rhizome growth. Roots can be found penetrating the soil up to 36 inches downward. Seeds will germinate about the same time as the appearance of root derived shoots starting in April and going through May. Two flushes are found most years, one in late spring and then again in late fall. It can be distinguished from other members of the thistle family by looking at the stem and flowers. The stem on Canada thistle will be spineless, unlike bull thistle or musk thistle, and the flowers lack spines or prickles as well unlike bull or musk thistle. Seedlings have cotyledons that are club-shaped; leaf margins are not regular and have spines. Leaves are alternate, sessile, simple and oblong. They have an irregular lobe with spiny margins. Canada thistle do not have a basal rosette (see Photo on next page).

Larval stage of the predacious checkered beetle often found under bark feeding on boring beetle larvae. Photo: G.J. Lenhard, LSU; ForestryImages.org

Adult checkered beetle forages on the bark of trees where they feed on bark beetles. Photo: Moser, USDA Forest Service; ForestryImages.org

Beneficial of the Week, Paula ShrewsburyCheckered beetles like to eat wood boring beetlesCheckered or Clerid beetles are in the family Cleridae and have a worldwide distribution with over 3,500 species. Checkered beetles can range in size from 3 – 24 mm and are elongate in shape, have short bristly hairs, and often bright-colored. Many species are predacious as adults and larvae. Checkered beetles live in a variety of habitats and have diverse feeding preferences. Two of the major groups of checkered beetles are referred to as “flower visitors” and “tree living species”. “Flower visitors” hang out on flowers (obviously) and feed on insects that visit flowers and pollen. The “tree living species” of checkered beetles are found on trees where they hide from their predators under bark and forage for their prey above and below the bark. The most common food of these checkered beetles is bark beetle and other wood boring beetle larvae and adults. We surely have enough bark beetles in our trees to keep these beetles happy for a long time! Adult checkered beetles tend to feed on adult boring beetles. Females of predaceous checkered beetles lay their eggs under the bark of trees. Checkered beetle larvae are predaceous and forage in the galleries of wood boring insects where they feed on bark beetle larvae. Some checkered beetles are very voracious feeders and are often key players in biological control.

Canada thistlePhoto: Chuck Schuster, UME

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Control can be accomplished by using many broadleaf post emergent herbicides. In turf areas 2,4-D with chlorsulfuron, and dicamba are effective. In beds and nursery rows repeated application of glyphosate is effective. Cultural controls would include fertility management, maintaining a dense turf, but being mindful of nitrogen applications, as excess nitrogen will increase weed growth. A high mowing height to allow shading of newly germinating seeds is an effective management tool in turf. Burning is not an effective method of control for Canada thistle.

Canada thistlePhoto: Chuck Schuster, UME

Plant of the Week, Ginny RosenkranzIberis sempervirens, candytuft, is an evergreen groundcover that blooms from early to late spring with fragrant white bouquets of flowers. The name sempervirens means “always green” in Latin which perfectly describes the dark green glossy foliage that doesn’t fade even in the cold temperatures of winter. The flowers are pure white with 4 petals and are arranged in a circular fashion as if on a parasol. When in bloom the flowers completely cover the plants with fragrance and snow white flowers. Iberis sempervirens ‘Alexander’s White’ is more compact than the species, making it a better plant for edging and borders and it also has more flowers. Candytuft can also be planted as a groundcover for a small courtyard or to brighten sections of a large landscape. It is also an excellent choice to cascade over a wall or planted in a rock garden. Many perennials will bloom for only 1-3 weeks, but Candytuft blooms for at least 4 weeks, 6 if the spring weather is cool. The plant itself prefers to grow in full sun but will tolerate some partial shade, although it will produce fewer flowers in the shade. It prefers moist, but well-drained soils and when established it can be very drought tolerant. Candytuft is not picky about soil acidity and is cold hardy in USDA zones 4-9. It grows 5-10 inches high and spreads slowly to about 1-2 feet wide. Deer and rabbits tend to avoid nibbling on Iberis, but aphids can be a problem. Diseases include club root, root rot and stem blight, usually due to wet soils.

Iberis sempervirens ‘Alexander’s White’Photo: Ginny Rosenkranz, UME

Degree Days (As of May 9)Baltimore, MD (BWI) 282 College Park 403Dulles Airport 319 Frostburg, MD 153 Martinsburg, WV 284 National Arboretum 403 Reagan National 403 Salisbury 371

To check degree day (DD) accumulations in your local area go to: http://www.weather.com/outdoors/agricul-ture/growing-degree-days/USMD0100

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PLANT PLANT STAGE (Bud with color, First bloom, Full bloom, First leaf)

LOCATION

Baptisia australis Bud Ellicott City (May 9)Chrysogonum virginianum Full bloom Ellicott City (May 8)Convallaria montana Full bloom Silver Run (May 8)Dodecatheon meadia Full bloom Silver Run (May 8)Menziesia ciliicalyx First bloom Silver Run (May 8)Neviusia alabamensis Full bloom Silver Run (May 8)

Podophyllum peltatum (mayapple) Full bloom Ellicott City (May 2)Rhododendron atlanticum First bloom Silver Run (May 8)Rhododendron austrinum First bloom Silver Run (May 8)Rhododendron ‘Snow Bird’ Bud with color Silver Run (May 8)Saruma henryi First bloom Silver Run (May 8)Staphylea colchica Full bloom Silver Run (May 8)Stewartia pseudocamellia Bud Ellicott City (May 9)Uvularia grandiflora First bloom Silver Run (May 8)Viburnum rhytidophyllum Full bloom Ellicott City (April 29)

Plant Phenology: What is in bloom

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.

Stanton GillExtension Specialist

sgill@umd.edu

Paula Shrewsbury Extension Specialistpshrewsb@umd.edu

Ginny RosenkranzExtension Educatorrosnkrnz@umd.edu

Chuck SchusterExtension Educator

cfs@umd.edu

Karen Rane Plant Pathologistrane@umd.edu

Brian Clark Extension Educator bpclark@umd.edu

Andrew RistveyExtension Specialistaristvey@umd.edu

David ClementPlant Pathologist

hgic.umd.edu

The information given herein is supplied with the understanding that no discrimination is intended and no endorsement by University of Maryland Extension is implied.

CONTRIBUTORS:

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.

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.

Upcoming Programs

Improving Your Diagnostic and Treatment Skills: An Evening SeminarMay 29, 2013Location: CMREC, Ellicott City, MD

Procrastinator’s Pest Management ConferenceFriday, June 7, 2013Location: Montgomery County Extension Office, Derwood, MDFor more information: Chuck Schuster, 301-590-2807 or cfs@umd.eduTo register: http://procrastinators18-eac2.eventbrite.com/

Eastern Shore Pest Management ConferenceFriday, June 14, 2013Location: Wye Research and Education Center, Queenstown, MDFor more information: Ginny Rosenkranz, 410-749-6141, ext 106

MNLA Nursery Field DayJune 20, 2013Location: Waverly Farm, Adamstown, MDContact: MNLA, 410-823-8684

The Maryland Christmas Tree Association (MCTA) Summer Christmas Tree MeetingJune 22, 2013Location: 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 ProductionJuly 10, 2013, 9 a.m. to 3:30 p.m.Location: CMREC, 11975 Homewood Road, Ellicott City, MD 21042Contact: Andrew Ristvey, aristvey@umd.edu, 410-827-8056 x113