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About cmanneri

Christy is a graduate of the Biden School of Public Policy and Administration at the University of Delaware with a master's in Public Administration. She is the chief operating officer of a local non-profit, 3B Brae’s Brown Bags and a Communications Specialist for the University of Delaware. Her research interests include issues of social justice, such as nutritional insecurity, community re-entry, and domestic violence. She also volunteers with her local school district and has a deep passion for education policy, as she believes many social injustices stem from inequitable opportunities in education.

The 71st annual meeting of the NJDelMarVaPa Plant Pathologists was held March 1, 2016, NJDelMarVaPa_2016at the University of Delaware. It was hosted this year by Nancy Gregory and Nathan Kleczewski, and serves as a regional update for colleagues and for networking, and is also an opportunity for students to present work.  Attendees included Cooperative Extension personnel from DE, MD, VA and PA, and pathologists from Pennsylvania Department of Agriculture. Information was presented on new and notable plant diseases, diagnostics, and field trials.
N Gregory 3/3/16

The final report for the UD Plant Diagnostic Clinic for 2015 has been posted and can be viewed at the following link:
Final Delaware Plant Diagnostic Clinic Report 2015 2_10_2016
The Plant Diagnostic Clinic at the University of Delaware is housed in the Department of Plant and Soil Sciences, and is located in Townsend Hall, Room 151. The clinic serves the public through Delaware Cooperative Extension, directly serving commercial growers, crop consultants, nurserymen, landscapers, public gardens, and private homeowners. Samples are also received through county offices, from Extension specialists, and the Master Gardener Program. The clinic is the National Plant Diagnostic Network (NPDN) laboratory for Delaware, and the survey laboratory for Delaware Department of Agriculture and USDA/APHIS CAPS for Delaware. The clinic operates with one full-time staff, the Plant Diagnostician, cooperating with the Extension Plant Pathologist and the Ornamentals IPM Specialist in Entomology, and numerous Extension personnel.
During 2015, the Plant Diagnostic Clinic processed approximately 630 non-survey routine clinic samples. A National USDA/APHIS PPQ CAPS karnal bunt survey in cooperation with Delaware Department of Agriculture for wheat seed samples from all grain elevator processing stations in Delaware included five composite aliquot samples. All samples examined for the presence of karnal bunt were negative, ensuring the safety of the Delaware wheat crop for trade and export. Nursery surveys for Delaware Department of Agriculture resulted in a few samples of boxwood and chrysanthemum. Other samples were diagnosed in field situations, and not brought in for analysis. Phone inquiries and e-mail requests for information accounted for undocumented samples in addition to physical specimens submitted to the lab. The Ask an Expert service through eXtension.org included 69 questions answered by the Diagnostician in 2015. Over 50 % of the total questions answered via Ask an Expert for Delaware involved trouble-shooting of possible disease issues. Some trouble-shooting samples for possible nematode infections were processed in the lab, but are not included in this report.... see link for full report and data.
NFG 2/11/16

The recent storm in the mid-Atlantic affected landscapes differently, but here are some tips from the lawn and garden experts in UD Cooperative Extension that you can take to repair your landscape.
Leaves – Most of the leaves remaining on trees prior to the storm are now down on the ground.  Leaves should be removed from lawn areas so turf can continue to receive sun and grow.  Rake, blow, mow or use a leaf vacuum to remove leaves and place them in the compost pile, a nearby landscape bed or the vegetable garden.  Leaves are a great source of nutrients and organic matter.  They are a resource you don’t want to leave your property.
Branches – Branches that have fallen can be picked up, used for firewood or chipped.  If a branch fell off a tree and left a ragged edge to the remaining limb, try to cut that limb off following the principles of natural target pruning—cut outside the branch collar (swollen area at the base of the branch) so you don’t injure trunk tissue.  Do not wrap or paint over cut areas, they will heal better if exposed to air. If the limb is too large or too high for you to handle, hire an insured tree company to clean up the damage.
Fallen Trees – If you have a chain saw, you can start sawing up fallen trees, once they have dried out.  But, in many cases it is better to hire an insured arborist (see below) to deal with fallen trees.
Damaged plants – Try to return shrubs bent over by winds to an upright position and secure them if soil remains saturated. Plants that were damaged due to limbs falling on them can be reshaped with some judicious pruning.  Any limb that is partially broken should be completely removed with a fresh cut outside the branch collar.  Do not wrap or paint over cut areas, they will heal better if exposed to air. Check out our pruning and maintenance page on the Lawn and Garden area of the website.
Water – Roots may be damaged by standing water and saturated soils, making them more susceptible to root rot fungi.  Keep in mind that it may take a while for soil to dry, and for new root development to occur.  Do not fertilize during this recovery period. Excess water puddling throughout your landscape will drain away eventually.  Just hope for a few sunny days!
Gardeners in the beach areas that may experience salt water intrusion on existing lawns should irrigate with fresh water to move the salt through the soil profile down below the root zone of the plants affected.  Good drainage is important for this to work.   If you are worried that the salt levels are too high for good plant growth, a soil test from UD’s Soil Testing Program can be done to determine soluble salt levels.
Our experts do not offer site visits to assess storm damage.  We do encourage homeowners to contact a local, certified, insured arborist.  We recommend looking on the  International Society of Arboriculture website or visit the Delaware Nursery and Landscape Association’s website for a list of landscapers.  You might want to also want to check with the Delaware Forest Service for additional tree resources.
For general gardening or landscaping questions that might be answered over the phone, call one of our county garden helplines.

An unusual sight on the morning of December 14th in Newark, DE was powdery mildew on Turf Powdery Mildewturfgrass in a residential lawn. Powdery mildew is favored by cool humid conditions and is usually seen in the spring and fall, in shady areas. Our normal December temperatures would have sent our lawns to a dormant state by now, but not this year. Our temperatures have been above normal, and there has been fog the past two mornings.  No control is normally necessary for residential lawns, but in severe cases or commercial sites, a fungicide can be applied. Call your local Cooperative Extension office for guidance on fungicides that are labeled.
N Gregory 12/14/15

Many of us choose a fresh cut tree to decorate our homes for the holiday season. Choose a tree with dark green color, good shape, a straight trunk at the base, and no taller than you really need. Check to see if the tree is fresh by bending needles; they should bend and not break. Needles should not fall off in great numbers, but some needle drop is normal. Have the vendor make a fresh cut of about 1/2 inch at the base, or do so yourself. Cut off small low branches, do not pull off. Some vendors will trim, shake, and wrap for transport.
Choose a good location in your home for your tree, not in a sunny window or near a fire place or heat vent. Until you bring it indoors, keep the tree in a cool, shady location, and stand it up in a bucket of water. Cut trees take up a lot of water in the first 5 days. Inside, use a tree stand that can hold at least a quart or two of water. Add water daily and try to not let the w ater level go below the cut end of the tree. Resin on the cut surface will cause it to stop taking up water. There are many “old-wives-tales” but adding a little lemon-lime soda, vinegar, or mouthwash to tree water may help keep bacteria levels low and trees fresh a bit longer. Keeping the thermostat set cool (about 68 F) will help a tree last.
Some people choose a live tree that has roots and soil wrapped in burlap. These trees can be planted outside after the holidays, but the time indoors adds to the stress of transplanting. Live trees should not be kept inside for more than about 8-10 days. The hole for planting should be prepared ahead of time since soil may freeze. Live trees are heavy and do cost more, but can be a memory that lasts. Cut trees must be discarded, but many municipalities will chip for mulch.
NFG 12/1/2015

A new fact sheet from UD Cooperative Extension highlights information on bacterial leaf scorch (BLS) of oak and other trees.  BLS has been problematic in oaks in the red oak group for almost ten years, and has led to the decline and death of many oaks in Delaware.  http://extension.udel.edu/factsheets/bacterial-leaf-scorch/
 

Poplar with early leaf drop due to drought
Poplar with early leaf drop due to drought

PREMATURE LEAF DROP is prevalent in the landscape due to dry weather. Plants are drought damaged by leaf desiccation, slowing of photosynthesis, and slowing of growth. Leaves wilt or roll, turn off-color, and drop.  Conifer needles drop, current season needles may turn yellow, then brown, and are smaller. Plants in the first three years of establishment (root development) are the most susceptible to extremes in water, including too much or too little water. Drought stress predisposes plants to insects and disease.  Examples of plants that do not tolerate drought include sycamore, tulip poplar, horse chestnut, sweet gum, Prunus, dogwood, maple, azalea, rhododendron, ash, pine, hemlock, Skimmia, Stewartia, Franklinia, and ground covers such as ivy and Lamium. Options for more drought tolerant plants include abelia, barberry, bayberry, birch, Malus, Amelanchier, Ginkgo, holly, lilac, some maples, ironwood, and white oak. Drought resistant conifers include Eastern red cedar, most junipers, Japanese black pine, mugo pine, Norway spruce, Colorado blue spruce and Taxus.
NFG 9/11/2015

Did you know that there is a plant diagnostic clinic associated with every land grant university in the U.S. and beyond?

Nancy Gregory talking to Newark residents about their landscape
Nancy Gregory talking to Newark residents about their landscape

Did you know that there is a plant diagnostic clinic associated with every land grant university in the U.S. and beyond? Some state Departments of Agriculture also have labs for commercial and regulatory samples.  https://www.facebook.com/pages/National-Plant-Diagnostic-Network-Training-and-Education-Page/150509028334075?fref=nf

Adult emerald ash borer
Adult emerald ash borer

EMERALD ASH BORER has been found in several surrounding states, but has NOT been found in Delaware to date. An article appeared in the 6/20/15 Wilmington News Journal regarding trapping efforts and preparedness for the detection of the invasive emerald ash borer in the state: http://www.delawareonline.com/story/news/local/2015/06/19/firewood-carries-unwanted-travelers/289815....  This is one of many cooperative efforts in Delaware between Delaware Department of Agriculture, USDA, University of Delaware, and many municipalities. Traps are specifically designed to attract and detect nearby emerald ash borer, which only feeds on ash, and another related tree, Chionanthus. A trap will not lessen the damage, those traps are only put out in certain locations in an attempt to detect low populations of the insect should it arrive in Delaware. If we detect very low numbers, we have a better chance of eradicating the pest. Ash, however, is attacked by numerous other insects (lilac/ash borers) and several plant disease causing organisms such as those causing anthracnose, rust, heart rot, ash yellows and ash decline. In Delaware, if you suspect you may have EAB in your ash trees, contact the Delaware Dept of Ag's Plant Industries Section at (302) 698-4586.
Keeping ash trees free of insect pests, woodpecker damage and plant diseases is best done by keeping trees healthy and reducing stress on trees. Water during times of drought, have trees pruned by a reputable company if there is significant dieback of branches, and avoid wounding if possible.
NFG 6/23/2015