Pam Bennett, Barb Bloetscher, Joe Boggs, Jim Chatfield, Erik Draper, Dave Dyke, Gary Gao, David Goerig, Tim Malinich, Amy Stone, and Curtis Young.
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June 21, 2007
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This is the twelfth 2007 edition of the Buckeye Yard and Garden Line (BYGL).
BYGL is developed from a Tuesday morning conference call of Extension
agents, specialists and other contributors in Ohio.
BYGL is also made available on the Internet from the Ohio State University
Horticulture and Crop Science (HCS) in Virtual Perspective website
(http://bygl.osu.edu). Additional fact sheet information on any of
these articles may be found through the OSU fact sheet database (http://plantfacts.osu.edu).
BYGL is a service of OSU Extension and is aided by major support
from the Ohio Nursery and Landscape Association (ONLA), with additional
funding from the Ohio Chapter of the International Society of Arboriculture
(ISA) to the OSU Extension Nursery Landscape, and Turf Team (ENLTT).
Participants in the June 19, 2007 conference included: Barb Bloetscher; (Entomology/C. Wayne Ellett Plant and Pest Diagnostic Clinic); Jim Chatfield; (OSU Extension Center at Wooster/Hort and Crop Science); Dave Dyke (Hamilton); Gary Gao (Delaware); Dave Goerig (Mahoning); Michael Loos (Cuyahoga); Dave Shetlar (Entomology); Amy Stone (Lucas); Curtis Young (Allen) and Randy Zondag (Lake)..
Additional factsheet information on any of these articles may be found
through the OSU Factsheet Database (http://plantfacts.ohio-state.edu/)
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WEATHER WATCH
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The following weather information has been summarized from data collected from June 1-20, 2007. We have chosen six locations to highlight different regions of the state to be included in BYGL each week as seen in the table below. Additionally, there are weather station sites in Avon (Lorain County), Madison (Lake County), Perry (Lake County), at the Muck Crops Research Station (Huron County), at the North Central Research Station (Sandusky County), and at the Western Research Station (Clark County). The weather data collected from all the sites can be seen at .
Monthly Summary, June 1-20, 2007
| Weather Station |
Region of Ohio |
Ave. High Temp F |
Ave. Low Temp F |
Total Precip " |
Normal Precip " |
| Ashtabula |
NE |
78.7 |
53.6 |
NA |
3.1" |
| Wooster |
NE |
81.3 |
55.5 |
1.69" |
2.6" |
| Hoytville |
NW |
84.4 |
57.8 |
1.02" |
2.3" |
| Delaware |
Central |
81.9 |
56.7 |
0.00" |
2.9" |
| Piketon |
South |
85.3 |
57.9 |
0.01" |
2.0" |
| Jackson |
South |
84.5 |
56.6 |
3.01" |
2.4" |
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HORT SHORTS
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GDD (GROWING DEGREE DAYS)
GDD is a measure of the daily maximum and minimum temperature and directly relates to growth and development of plants and insects. The GDD of any zip code location in Ohio is estimated using the GDD of ten OARDC weather stations and available on the web at the site below.
The range of GDD accumulations in Ohio from north to south is 880 to 1,358. Following is a report of GDD for several locations around Ohio as of June 20, 2007: Painesville, 880; Cleveland, 947; Toledo, 1,041; Canfield, 970; Lima, 1,005; Wooster, 1,011; Coshocton, 940; Columbus, 1,042; Springfield, 1,179; Dayton, 1,211; Cincinnati, 1,277; Ironton, 1,321; Portsmouth, 1,325; Piketon, 1,358; Marietta, 1,275; and Jackson, 1,313.
To put these GDD accumulations into perspective, the following is an abbreviated listing of plant and insect species with their respective phenological event and average GDD accumulations at which these events occur. Due to variations in weather, temperature, humidity, etc., these events may occur a few days earlier or later than predicted by the average GDD. By looking at a city, town, or village near you from the above list, or visiting the above web site, you can see what could be taking place in the landscape around you.
Greater peach tree borer, adult emergence, 775; rhododendron borer, adult emergence, 815; northern catalpa, full bloom, 816; mountain laurel, full bloom, 822; dogwood borer, adult emergence, 830; oakleaf hydrangea, first bloom, 835; cottony maple scale, egg hatch, 851; panicle hydrangea, first bloom, 856; fall webworm, egg hatch (first generation), 867; mimosa webworm, egg hatch (first generation), 874; fuzzy deutzia, full bloom, 884; winged euonymus scale, egg hatch, 892; spruce budscale, egg hatch, 894; winterberry holly, full bloom, 897; panicled goldenraintree, first bloom, 924; June bride littleleaf linden, first bloom, 953; azalea bark scale, egg hatch, 957; Japanese beetle, adult emergence, 970; rosebay rhododendron, first bloom, 1,010; June bride littleleaf linden, full bloom, 1,115; bottlebrush buckeye, first bloom, 1,158; panicled goldenraintree, full bloom, 1251; rose-of-Sharon, first bloom, 1347; and pine needle scale egg hatch, 1349.
Take some time to go to the GDD website at http://www.oardc.ohio-state.edu/gdd/ and see what it offers because it is more than just current GDDs. New additions to the Summary of Phenological Events chart include links to factsheets, bulletins and images related to most of the plants and pests highlighted on the web page. The information covered by these materials includes diseases, pests and research.
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PLANTS OF THE WEEK
Read all about perennials and landscape trees and shrubs in the ONLA publications "Perennial Plants for Ohio" and "Landscape Plants for Ohio." The descriptions and photographs of plants were provided for these publications by the OSU ENLT Team along with other industry plant lovers. These full-color publications are available at http://Buckeyegardening.com for $5.00. Click on "garden store" and then "ONLA plant guides." ONLA members can purchase these in quantities at a reduced price at http://onla.org .
*PERENNIAL OF THE WEEK. RUSSIAN SAGE (Perovskia atriplicfolia) is the perennial plant of the week. It is in full bloom in Central Ohio during the third week of June. This wonderful plant has aromatic, gray-green foliage and spikes of tiny, lavender-blue flowers that bloom from June to September. It is an airy plant that contrasts well with other perennials. Russian sage does well in full sun to partial shade. Make sure you give it a lot of space since it grows to 36-48" tall. Russian sage was once a "Perennial Plant of the Year" selection by the Perennial Plant Association for its outstanding horticultural characteristics and ease of care.
*WOODY ORNAMENTAL OF THE WEEK. SUMMERSWEET CLETHRA (Clethra alnifolia). This increasingly popular 6-8' shrub has very fragrant, narrow upright flower panicles which freshen entire areas of the garden. Attractive lustrous green leaves and delicate persistent woody fruits are effective in winterscapes. Summersweet thrives in wet sites but tolerates dry soils. Good yellow fall foliage color. Many cultivars include 'Hummingbird', a 3-4' dwarf with 6" white flower panicles. 'Ruby Spice' with very ornamental rose-pink flowers, and 'Sixtenn Candles'.
*ANNUAL OF THE WEEK. ORNAMENTAL SWEET POTATO VINE (Ipomoea batatus) is grown for its decorative foliage, which comes in many shapes and colors, and vigorous growth habit, covering ground almost as quickly at kudzu. It is superb for cascading over walls and as a ground cover. Smaller, less vigorous cultivars may also work very well in mixed containers.
Sweet potatoes bring color to the garden through the entire growing season. They help emphasize and enhance the flowers and foliage of nearby plants. The purple, deeply lobed foliage of 'Blackie' and the lime green and heart-shaped leaves of 'Marguerite'; bring out the burgundy and green in coleus and contrast beautifully with both variegated plants and bright colors. Like 'Blackie', 'Black Heart' is purple, but with heart-shaped leaves. The pink hues in 'Tricolor' leaves appear bolder and more visible when planted with pink or fuchsia-colored flowers. 'Pink Frost' which is not as vigorous as most other cultivars, is outstanding with three-lobed leaves in variegated pink, green and white. Plants in the 'Sweet Caroline'; series come in green, bright lime green, purple, and bronze and have smaller root systems. All cultivars of sweet potato vines trialed at the Cincinnati Zoo and Botanical Garden have consistently done very well. They will do the best in full sun, with some afternoon shade quite acceptable, in a fertile and well-drained soil.
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THE WEEKLY WEED
Scattered throughout Ohio, along roadsides, pastures and low maintenance turfgrass areas, one may notice dainty blue ligulate (ray) flowers atop wiry stems reaching 1-3' in height. These flowers belong to CHICORY (Cichorium intybus). The flowers on this prolific seeder will be with us now until the first frost. Chicory is a perennial plant which forms a basal rosette that is sometimes confused with the dandelion. Distribution of this common plant appears to be worldwide. It produces a dark brown, fleshy taproot that has been used as a substitute for coffee. Chicory, like Jim Chatfield's hair, does not tolerate cultivation.
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LEAF DROPPERS
Drought seems to be the hot topic of the day as many areas of Ohio are suffering from little or no rain for weeks accompanied by excessive heat. Several BYGLers mentioned seeing warning signs of soil water deficits, such as grass going dormant taking on a straw-like appearance, shrubs wilting by midday, and tree leaves turning yellow and dropping to the ground. Some of these harbingers of impending drought stress are RIVER BIRCH (Betula nigra), tulip POPLAR TREES (Liriodendron tulipifera) and BLACK WALNUT (Juglans nigra). These trees respond to drought stress by shutting down old and damaged leaves, harvesting essential nutrients out of the leaves that usually turn yellow as this process proceeds, and finally drop the yellowed leaves to the ground. This leaf drop is a self-preservation mechanism used to slow water loss by the tree. Less leaves on the tree means less surface area through which to loss water.
Leaves are critical for manufacturing carbohydrates utilized in each and every life sustaining process within the tree. So the balancing game between the need for leaves to manufacture carbohydrates and the need to preserve precious water resources begins and will continue as long as water resources remain limited. All plants need water to survive, but the hard to answer question is how much water different types of plants need to survive through a drought.
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DECIDUOUS TREE DEBACLE
Dave Goerig and others reported they were called out this past week to visit landscape sites where they observed deciduous trees of various sizes and species in total collapse. The weekly BYGL round table wasted no time providing possible causes of the trees' demises. The following are some things to consider relative to your local situation:
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BUG BYTES
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MIMOSA WEBWORM TANGLES UP HONEYLOCUST LEAVES
Gary Gao reported that mimosa webworm is tangling up (webbing together) and skeletonizing honeylocust leaves in Delaware County. This webworm is a common pest of mimosa in the southern states where mimosa is grown but it damages honeylocusts, especially thornless varieties, in the northern states. Within the protection of the webbed foliage, the larvae skeletonize the leaflets. This causes the leaves to soon turn brown. During summers with prolonged warm weather conditions, this pest may complete several generations that result in most of the host tree foliage being webbed together and turned brown. Often, multiple trees planted in dense rows near buildings or other protected areas may be more heavily attacked than individual trees located by themselves in the open. Since the adult females are attracted to old larval silk, previously infested trees continue to be more heavily attacked through the season.
Control measures for mimosa webworm include using resistant cultivars and single plantings, biological control with Bacillus thuringiensis (Bt) or standard insecticide sprays. Green cultivars such as 'Moraine', 'Skyline', 'Shademaster' and 'Imperial' are less susceptible to attack by mimosa webworm. Avoid mass plantings. Most insecticides registered for caterpillar control will work against the mimosa webworm. However, spray all the tree foliage since small nests may be difficult to see. Once a tree has been infested, each subsequent generation of new adults will be attracted to the existing silk left behind. Therefore, additional applications may be necessary if new activity is noticed or the pearly pink eggs are detected in old webbing.
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WAITING ON WETTER WEATHER?
Over the past couple of weeks, BYGLers have reported a smattering of adult JAPANESE BEETLE (Popillia japonica) sightings around the state, but no great numbers. Randy Zondag in Lake County has also reported only chance sightings of a few EUROPEAN CHAFER (Rhizotrogus majalis) adults emerging, not the spectacular mass emergences of previous years. Dave Shetlar reported that he was finding Japanese beetle adults in earthen cells in the soil seemingly waiting to emerge once moisture conditions improve. Where NORTHERN MASKED CHAFER (Cyclocephala borealis) predominates, they too may be slow to emerge because of the excessive dryness of the soils. Interestingly, Curtis Young was visiting a landscape shortly after the Tuesday BYGL conference call in Lima where it has not rained more than 1/2" total rain for the month of June, but was raining at the time. Much to Curtis' surprise, many of the plants in the landscape had newly emerged Japanese beetle adults sitting on them. This may have been entirely coincidental that the two events were happening at the same time. Some locals around the state have been receiving more rain than the rest of Ohio and the preceding statements may not hold true for them.
Where populations of Japanese beetles remain low, the low numbers of scattered adults will not cause much damage and do not require management with insecticides. However, these loner adults can serve as "advanced scouts" to attract later emerging adults to the scene by releasing chemical attractants. Evening plant inspections and the physical removal and destruction of the scouts will help reduce overall damage to preferred and susceptible host plants. Remain on the alert for coming emergences of these adult scarabs.
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BROAD MITES
While participating in the Extension Reloaded Tour in Hamilton County with Dave Dyke a couple of weeks ago, Luis Canas, OSUE Entomology Specialist, noticed several hanging baskets of dark colored, very stunted and distorted TORENIA. The plants appeared to have been subjected to a misapplication of a herbicide or plant growth regulator. However, subsequent investigation at the C. Wayne Ellett Plant and Pest Diagnostic Clinic identified the culprit as broad mites (Polyphagotarsonemus latus).
These mites are so small that they are virtually invisible on the host plant, even with a good hand lens. In addition, they tend to crowd into crevices and buds and feed on the growing tips. Females are about 0.2 mm long and oval in outline. Their bodies are swollen in profile and are light yellow to amber or green in color with an indistinct, light, median stripe that forks near the back end of the body. Males are similar in color but lack the stripe. The male is smaller (0.11mm) and faster moving than the female. Broad mite eggs are elliptical but are covered by small whitish bumps that look like rows of diamonds. Their eggs tend to be laid so they are exposed on the underside of the leaf or stem surface.
Broad mites have a wide host range and can feed on African violets, ageratum, begonia, cyclamen, dahlia, gerbera, gloxinia, hibiscus, ivy, jasmine, impatiens, New Guinea impatiens, lantana, marigold, snapdragon, verbena, and zinnia. These mites can also infest vegetable bedding plants such as beans, peppers and tomatoes. They inject a toxin from their saliva as they feed. Leaves become twisted, and hardened with bronzed lower surfaces. Leaves frequently turn downward, and young terminal buds can be killed. For further information on this mite, refer to University of Connecticut IPM publication, "Managing Cyclamen Mites and Broad Mites in the Greenhouse" that can be found at the following website: http://www.hort.uconn.edu/Ipm/greenhs/htms/cyclmites.htm
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SUMMER CATS ARE OUT!
Several caterpillars have been sighted this week including the CATALPA SPHINX, FALL WEBWORM, HICKORY TUSSOCK MOTH, and WALNUT CATERPILLAR. Catalpa sphinx caterpillars (Ceratomia catalpae) are quite distinctive, as they are black, smooth, with a pale or yellow stripe along each side, and typical of their Family Sphingidae, have a prominent black horn arising from the tip of the abdomen. Mature caterpillars are about 3" in length. Because the early instars feed gregariously, large populations of the catalpa sphinx can damage smaller trees. Watch vulnerable catalpa trees and treat if large numbers of these hungry caterpillars appear.
Fall webworms (Hyphantria cunea) are covered with long hairs which vary in color from pale yellow-white to gray. Black tufts of hair may be seen along the back, as well as black warts. These caterpillars enjoy a large palette of greens including apple, ash, cherry, elm, hickory, oak, maple and walnut leaves, and live in communes with their siblings within a mask of white silk and leaves. Their silken hideouts are often confused with the Eastern tent caterpillar "nests," however Eastern tent caterpillars form their silken hideouts in forks or crotches of trees, while the fall webworms choose the tips of branches. Early detection and disposal of the nests is the best defense against these caterpillars.
Hickory tussock moth caterpillars (Lophocampa caryae) look similar to the fall webworms, but are solitary and tend to roam more. They are covered with tufts of white hairs with long tufts of black hairs on each side behind the head and two more on opposite sides toward the tip of the abdomen. A series of short black tufts may be seen in the center of each abdominal segment. Like the fall webworms, they can eat a wide variety of leaves and at times, can enjoy a "good year" with large populations. When populations are high, damage can occasionally occur on small trees. Monitor trees to make sure that heavy populations don't damage susceptible trees.
Walnut caterpillars (Datana integerrima) also feed gregariously at first but hide on the bottom of leaves where they often undergo several instars before the damage is noticed. The walnut caterpillars change color as they mature, starting as a reddish caterpillar with white stripes and fine white hairs until finally it becomes all black with long, soft white hairs.
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SPIDER MITES TAKING THE HEAT
Although the plants may not care for the warm weather and droughty conditions, the summer spider mites are loving it! Dave Shetlar noted OAK MITES (Oligonychus bicolor) damaging oak leaves and MAPLE SPIDER MITES (O. aceris) sucking the sap out of silver and red maple leaves. These mites can build high populations quickly in hot, sultry weather, and cause a bronzing of leaves.
Monitoring is the best defense to avoid plant injury. Trees and shrubs near sidewalks, buildings and hot, dry places should be checked weekly along with plants which have been attacked in previous years. Look closely and know the habits of the spider mites, as while many spider mites feed from the bottom of leaves, the oak mite lives on the upper surface of oak leaves.
Dave Shetlar recommends using a white board to detect the presence of spider mites. Hold a branch over a stiff white board and whack it firmly with a stick several times. Tilt the board to allow the debris to fall off the board then watch the board closely. You may notice different colored dots moving on the board. Depending on the plant and the mites which attack it, different colored "dots" may appear. Fast moving red ones are usually predatory mites and should be encouraged to persist. Oak mites are dark with yellowish legs and head, while the maple and honeylocust mites are mostly yellowish to beige. Twospotted spider mites are yellowish with two black spots on their back.
Learn to recognize the pest species of mites, so when they appear on the board, prompt treatment can follow. Remember to avoid permethrin, malathion and carbaryl, as the more standard insecticides tend to kill the predatory mites instead of the phytophagous mites. Avid, Floramite, Hexygon and Scimitar are listed as effective for some spider mites, however follow the labels carefully to avoid problems.
Refer to OSU Extension Bulletin 504, "Insect and Mite Control of Woody Ornamentals and Herbaceous Perennials" for current recommendations.
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WHITE PINE SHEPHERDS CROOKS
Damage as a result of the feeding activity of WHITE PINE WEEVIL (Pissodes strobi) larvae is becoming very obvious on white pines and spruces that were attacked this spring. Dave Shetlar reported the terminal leaders, especially on Eastern white pines, are rapidly dying, drying out, turning brown and bending over to form the shepherd's crooks characteristic of white pine weevil infestation. Spruces that were attacked are not progressing in the development as the pines, but the terminal leaders are beginning to take on an unhealthy appearance displaying a gray ghostly hue to reddish-brown. The death of the terminal leaders is the result of the larval tunneling. Larvae typically tunnel downwards just under the bark of the limbs. The tunneling usually does not progress past the top two limb whorls; however on small trees, larvae may tunnel to the base of the main stem, killing the entire tree.
It is too late to apply insecticides to kill the developing larvae. Dave observed larvae still feeding, but some larvae had already begun to make their characteristic chip cocoons beneath the bark. The best approach to management of the white pine weevil now is to identify the infested leaders, prune them out of the trees and destroy them. When pruning out the infested leaders, one may have to cut into what appears to be un-infested living tissue. After making the first cut, check the end of the cut to see if larval tunneling goes further down into the tree than where the cut was made. Repeat cuts until clean tissue is observed. After removal of the infested leader, a new leader will have to be trained to replace the original.
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DISEASE DIGEST
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RUST NEVER SLEEPS: PART I
Following are some key points about the many rust diseases that occur on plants. We will discuss rusts in the next several BYGLs.
Rust diseases are infectious plant diseases caused by rust fungi. There are many different rust fungi. In fact, there are over 5000 different species of rust fungi, classified in the Basidiomycetes or club fungi. Basidiomycete fungi include mushroom fungi, bracket fungi, and many others, but rust fungi are a distinct group within the Basidiomycetes, classified in the Uredinales order.
There are many rust diseases of historical importance, many rust diseases currently in the news and many rust diseases that are present and in some cases causing significant problems in landscapes, greenhouses and nurseries.
Historically, black stem rust of wheat contributed to hunger and famine worldwide following World War I, cedar apple rust disease was long a bane for orchardists in many parts of the world, white pine blister rust is a major forest disease in North America, and coffee rust in tropical climes, well - that is enough not to keep you up awake at night. Today the news is full of news of soybean rust as it moves northward and threatens this critical farm crop in the U.S. Rust diseases are even common on woodland wildflowers. Green industry professionals can bore your family even while on springtime woodland walks, pointing out the yellow-orange lesions on the upper leaves of may-apples and the bright orange changing to rusty red pustules on the leaf undersides.
As for nursery, landscape and greenhouse ornamentals we hear frequently of rust diseases such as: cedar rusts on junipers, hawthorns, and crabapples, daylily rust, hollyhock rust, snapdragon rust, geranium rust, and various turfgrass rusts.
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TURF TIPS
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WATCH OUT FOR CUTWORMS
Both adult BLACK CUTWORMS (Agrotis ipsilon) and COMMON ARMYWORMS (Pseudaletia convecta) have been caught in Dave Shetlar's light traps this week, with peak numbers of the black cutworm occurring. Golf course managers should be watching for the larvae to appear in the next few weeks, and treat if they have had problems with them in the past.
Damage from black cutworm larvae looks like brown depressed spots or ball marks, as the larvae clip the leaf blades at the base, under the cover of darkness. During the day, the caterpillars hide in tunnels made by aeration holes or spikes. The caterpillars undergo 6-7 molts in 20-40 days, then pupate in the soil and emerge for a second generation.
To reduce the larval pressure on greens and tees, take the clippings far away from the location, as the eggs are often on the tips of the leaves, and hatching caterpillars will crawl from the clippings pile right back to the green. If the course was treated with one of the preventive systemic insecticides earlier this season, no additional treatment may be necessary. If brown pock marks appear though, drench the area with a mixture containing 2 gallons of water to 2 tablespoons of a dishwashing liquid. In 5-10 minutes, small to medium sized greasy looking, dark colored caterpillars will come writhing to the surface. If black cutworms are seen, treatment may be required. Beta-cyfluthrin, bifenthrin, cyfluthrin and deltamethrin will control these caterpillars curatively, if applied late in the day. Since black cutworms feed on the surface, do not irrigate after treatment.
Armyworms are less of a problem on golf courses but occasionally have been known to "mow" neighborhood lawns. Homeowners will call in alarm when their lawn suddenly disappeared! By the time the damage is seen, no treatment is necessary, except maybe lots of water to encourage new growth.
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INDUSTRY INSIGHT
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DROWNING DURING A DROUGHT?
Randy Zondag warned of potential watering problems for plants grown in containers as well as in the field. Plants grown under both conditions need to be monitored closely to determine if watering practices are accomplishing the intended end results. If irrigation systems are not monitored or hand-watering practices are not checked, plants may not be receiving the proper amount of water they need. They may be getting too little or too much. Randy reported finding wilted viburnum plants in containers that were wilted not because of a lack of water, but rather a response to excessive heat. There was plenty of water in the soil in the pots, thus there was not a need for additional water. However, if the soil had not been check it would have logically looked like a plant lacking water and it would have been watered again. Too much water could result in root rots and greater plant damage than simple drought stress.
Monitoring of watering practices and irrigation systems is a must. Containers in production areas need to be randomly checked through it block to determine if plants are being missed, over-watered or receiving the right amount to keep them healthy. This check should include pulling some plants out of the containers to observe the extent to which water is penetrating into the soil of the pots. In field production areas being irrigated, irrigation equipment should be check for wear and proper function and irrigated soils should be probed with a soil probe to check for soil conditions. Look for water penetration into the soil, dryness or over saturation. Adjust irrigation heads and placement, and hand-watering practices accordingly based on the results of the spot checks made.
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TOLEDO TOUR HIGHLIGHTS EAB ACTIVITY
On Wednesday, June 20, the Ohio Chapter of the Association of Natural Resources Extension Professionals (ANREP) hosted a tour of EMERALD ASH BORER (EAB) infested areas in NW Ohio. Tour highlights included seeing Davis Sydnor's EAB Host Preference Study, Toledo streets at various stages of EAB attack and recent replanting projects, the Toledo's Wood Lot and its horizontal grinder at work, and a woodland in Oak Openings Metropark. The tour provided participants with hands-on (and eyes-on) experience with EAB and opportunities for lots of photos. Adult beetles were observed feeding and mating, and larvae were found as the draw knives were used to peel back the bark of infested trees.
If you haven't had the opportunity to see EAB devastation first hand, now is the time get that look. As Ohioans prepare for the arrival of this exotic insect pest, seeing the impact first hand is truly eye-opening. No matter the distance from the leading edge of EAB, the artificial spread has infestations "popping-up" across the state. Currently, EAB has been found in 29 Ohio counties including the southern most infestation in Hamilton County (east of Cincinnati) and the eastern-most infestation in Mahoning County (along I-76, near the Pennsylvania line). Current maps can be found at the Ohio Department of Agriculture (ODA) at http://www.ohioagriculture.gov/eab .
If you are interested in seeing the EAB sites, contact Amy Stone at 419-578-6783 or by email at stone.91@osu.edu .
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ODA EXPANDS EAB QUARATINE
The Ohio Department of Agriculture (ODA) has expanded the EMERALD ASH BORER quarantine to include Mahoning County. The insect was found in declining trees along I-76 in Ohio's last service plaza before entering Pennsylvania. The specimens were collected and sent to USDA APHIS for confirmation. Currently, 29 of Ohio's 88 counties have identified populations. For additional information on EAB check out the following websites: http://ashalert.osu.edu and http://www.ohioagriculture.gov/eab/.
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COMING ATTRACTIONS
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DELAWARE COUNTY LANDSCAPE AND GARDEN DIAGNOSTIC WORKSHOP
OSU Extension in Delaware County is pleased to offer a landscape and garden diagnostic workshop from 9:30 a.m. to 12:00 p.m. on June 25. This program will be held in room G35 of Hayes Service Building at 140 North Sandusky Street, Delaware, OH 43105. It is open to Master Gardeners, home gardeners, garden center employees and landscapers. Jim Chatfield and his new sidekick, Gary Gao, will be the featured speakers. There is a $15 fee, which includes the program, refreshments and a certificate of completion. Please contact Cindy Kaelber of OSU Extension-Delaware County by phone at 740-833-2030 or email at kaelber.1@cfaes.osu.edu for a registration form.
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10th ANNUAL GREEN INDUSTRY SUMMER SESSION SET FOR AUGUST 1
This August 1, 2007 all Northwestern Ohio industry professionals are invited to attend the 10th annual educational event, held at Owens Community College in Toledo, OH. Credits for ONCT, ASLA, ISA, Pesticide Applicators, and/or Master Gardeners will be available. For questions - contact OSU Extension, Green Industry Center (419-354-6916).
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40TH ANNUAL NURSERY GROWERS OF LAKE COUNTY OHIO (NGLCO) FIELD DAY
40TH ANNUAL NURSERY GROWERS OF LAKE COUNTY OHIO (NGLCO) FIELD DAY is August 14, 2007. The NGLCO Field Day will be held at Holden Arboretum in Kirtland Ohio. The program this year will feature garden tours of the 3500 acre Holden Arboretum - this year featuring a garden railroad. Time and location information will be on the following website http://www.nglco.com/fieldday.htm . Master Gardeners and students will receive a special price. For further information call 440-241-7969.
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BYGLOSOPHY
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"Those who dwell, as scientist or laymen, among the beauties and mysteries of the earth are never alone or weary of life" - Rachel Carson, who was born 100 years ago on May 27th.
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