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UMass Extension Landscape Message #4
March 20, 2008

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The LANDSCAPE MESSAGE is an educational newsletter intended to guide landscape, nursery and urban forestry professionals in identifying pests in the landscape, monitoring their development, planning management strategies and creating site-specific records for future management reference.

UMass Extension has updated this issue to provide timely pest management information and the latest regional news and environmental data throughout Massachusetts. During the months April, May, and June this newsletter will be updated weekly. The next update will be available on or about April 3, 2008.

Missed a previous message? Visit the Landscape Message Archive.

Interested in additional turf-oriented content? UMass Extension Turf Program Management Updates External link

SCOUTING INFORMATION BY REGION

REGIONAL NOTES -

Cape Cod Region (Barnstable) – General Conditions:  No report.

Southeast Region (Hanson) – General Conditions: Hanson received 3.8 inches of rain the past two weeks.  Soils are moist.  Silver maple, Helleborus foetidus, Adonis vernalis (winter aconites), snow drops, Hamamelis mollis 'Pallida' and Hamamelis x intermidia 'Arnold Promise' are in full bloom.  Helleborushybridus and Helleborus niger have pushed up flower buds and are showingcolor.  Last year at this time the hellebore flowers were dead from cold injury.  In Boston, Helleborus niger was in full bloom on Commonwealth Avenue.  Crocus are in bloom in some areas of Plymouth County and Cornus mas buds are fat, swollen and starting to show color.  The fruit of cranberry viburnum, the berries of many hollies, and the bark of Acer griseum are still providing color and interest in the landscape.  The black-winged blackbirds have been back for a few weeks, and lawns abound with robins.  Pests/Problems:  Be on the lookout for deer ticks on warmer days.  Deer continue to browse.  Vole damage to trees has been reported.  There were no other pest problems to report.

East Region (Boston) – Pests/Problems: Soils are saturated.

Metro West (Hopkinton) – General Conditions: There was 3.2 inches of rain during the storm that started on the 7th of March and ended on the 9th.  Snowdrops and crocus are in flower now.  Pests/Problems:  Some winter desiccation is now becoming noticeable on Taxus and Chamaecyparis.

Metro West (Waltham) – General Conditions: Spring bulbs are starting to emerge.  The snow is mostly gone.  I think we are officially in the mud season.

Central Region (Boylston) – General Conditions: The snow is slowly melting and early bloomers like Christmas Rose (Helleborus niger), Snow Drops (Galanthus nivalis), Crocus and Aconite (Adonis amurensis) are beginning to show color.  Pests/Problems:  Deer damage continues.   

Pioneer Valley Region ( Amherst) - General Conditions: The snow is gradually melting with the mild daytime temperatures and heavy rainfall.  Cold nights (below freezing) and cool days (above freezing) were the pattern, which is great for maple syrup collecting.  All plant life continues to appear dormant except a slight greening of lawns and foliage of bulbous plants beginning to erupt through the soil.  Pests/Problems:  There is pooling of water on areas with saturated soil.  No significant pests or disease problems to report.  

Berkshire Region (Great Barrington) - General Conditions: Cold and damp weather continues to dominate.  The past two weeks were a very wet period.  There are very few signs of spring renewal.  Snowdrops, pussy willow, and witchhazel are in bloom.  Early crocus are in bloom in sheltered locations.  Pests/Problems: Other than deer browsing and wind damage to trees and shrubs, there is not much to report.  Heavy rains resulted in some flooding and standing water is common on poorly drained sites and in depressions where soil remains frozen.

ENVIRONMENTAL DATA -

The following growing-degree-day (GDD) and precipitation data was collected for two-week period, March 5, 2008 through March 18, 2008.  Soil temperature and phenological indicators were observed on  March 18, 2007.  Accumulated GDDs represent the heating units above a 50° F baseline temperature collected via our instruments from the beginning of the current calendar year.  This information is intended for use as a guide for monitoring the developmental stages of pests in your location and planning management strategies accordingly.

Region/Location
2008 GROWING DEGREE DAYS
Soil Temp
(°F at 4" depth)
Precipitation
(4-Week Gain)
2-Week Gain
Total accumulation for 2008
Cape Cod
n/a
n/a
n/a
n/a
Southeast
5
16
40°
3.80"

East

n/a
9
32°
2.00"
Metro West
(Hopkinton)
1
8
37°
3.67"
Metro West
(Waltham)
0
0
32°
2.56"
Central
0
0
Frozen
3.54" rain + 2" snow
Pioneer Valley
0
0
32°
3.24"
Berkshires
0
0
35°
4.25"
AVERAGE
1
5
35°
--

n/a = information not available

PHENOLOGY -

The phenological indicators are a visual tool for correlating plant development with pest development. The following are the indicator plants and the stages of bloom observed for this period:

Indicator Plants - Stages of Flowering (begin, b/full, full, f/end, end)

PLANT NAME (Botanic/Common)

CAPE

SOUTH EAST

EAST

METRO W.

CENT.

P.V.

BERK.

Hopkinton
Waltham

Hamamelis x intermidia (Witchhazel hybrids)
*
full
full
full
full
full
*
begin
Hamamelis x mollis (Chinese Witchhazel hybrids)
*
full
full
begin
*
full
*
*
Cornus mas (Corneliancherry Dogwood)
*
*
begin
full
*
*
begin
*
Acer saccharinum (Silver Maple)
*
*
*
begin
*
*
*
*
* = no activity to report/information not available

CAPE COD REGION - Roberta Clark, Horticulturist for Barnstable County, Barnstable.

SOUTHEAST REGION - Deborah Swanson, Horticulturist for UMass Extension in Plymouth County, Hanson.

EAST REGION - James R. Allen, Horticulturist and Greenhouse Manager for UMass Biology Department, Boston.

METRO WEST REGION – Mark Sawyer, Horticulturist, Weston Nurseries, Hopkinton.

METRO WEST REGION – James Martin, Consulting Arborist, reporting from the UMass Extension Center, Waltham.

CENTRAL REGION - Joann Vieira, Superintendent of Horticulture, Tower Hill Botanic Garden, Boylston.

PIONEER VALLEY - Dan Gillman, Plant Pathologist, UMass Extension Plant Diagnostic Lab, UMass, Amherst.

BERKSHIRES - Ron Kujawski, Specialist, UMass Extension Landscape, Nursery & Urban Forestry Program, Amherst.

WOODY ORNAMENTALS

INSECTS -

Piercing-Sucking Pests:

  • Hemlock Woolly Adelgid Adobe PDF icon - Populations of this pest are resurging in the state after several years of being reduced in numbers.  Sudden cold in January of 2000, after a mild entry into winter, reduced HWA populations in MA significantly.  Then, the extended and deep cold during the winter of 2005, again, reduced their numbers by as much as 90% in some areas.  However, early indications are that HWA is once again rebounding in high numbers.  Monitor for building populations and treat in the spring when the weather is conducive for the application of dormant oil sprays or the application of a systemic imidacloprid product.   Dr. Joseph Elkinton at UMass Amherst is currently working on a new predatory beetle which, initially, shows great promise as being a natural control for hemlock woolly adelgid in MA.  For more information on the Laricobius nigrinus beetle, visit the following web site:    http://www.invasive.org/hwa/laricobius.cfm External link

  • Fiorinia Scale (aka Elongate Hemlock Scale) - This very serious pest of hemlock is often found attacking the same trees, at the same time, as hemlock woolly adelgid.  Monitor for the presence of this pest as well and treat when appropriate.  If left unchecked, Fiorinia scale can be a devastating pest for hemlock.

Defoliators:

  • Winter Moth -   Flight of the adult moths in late 2007 was, initially, quite noticeable; but the incidence of earlier than normal snowfall may have reduced the numbers emerging from the soil.  If so, this event may result in lower numbers of caterpillars in some areas this coming spring.  However, the eggs of winter moth are difficult to detect.  Starting around early to mid April, carefully inspect the interior of buds on susceptible host plants for the activity of this pest.  Dr. Elkinton and his research lab continue to rear the parasitic fly, Cyzenis albicans, for release this coming spring in MA.  Last year, they were able to recover some winter moth larvae on Cape Cod that had been parasitized by flies from their earlier releases.

Reported by Robert Childs, Entomologist, UMass Extension Landscape, Nursery and Urban Forestry Program, Amherst

DISEASES -

Trees and shrubs - The spring of 2007 was wet in many parts of New England and resulted in a lot of leaf spot and shoot blight diseases.  These diseases, as well as branch cankers, may disfigure woody plants, but they seldom kill otherwise healthy plants.  However, if leaf spots and blights were serious problems last year, infected plant material from last years may produce fungal fruiting structures this spring that release an abundance of inoculum.  During wet springs, these spores infect young leaves and shoots.  For high value plants where appearance is important, consider several applications of fungicides beginning as buds open if conditions are wet this spring.  Alternatively, consider replacing plants with recurring leaf spots and blights with resistant varieties or other plant materials better adapted to the site.

In addition, scout rosaceous plants watching for brown-black branches infected with the fire blight Adobe PDF icon bacterium, such as crabapple, apple, pear, firethorn, hawthorn, cotoneaster, and related plants.  Remove dead branches and dispose of them away from the plants to reduce inoculum.  Lilacs with dead shoots from bacterial blight also benefit from their removal.  Disinfect pruning tools between each cut with 70% ethyl alcohol, a 10% bleach solution, or a comparable bacterial disinfectant.

Look for swollen branches (twice or more the normal diameter) on plum and cherry trees infected with black knot Adobe PDF icon canker. Prune to remove infected branches, but also to improve the branch structure within the tree crown.  Removal of inoculum before the fruiting structures erupt through the bark helps reduce inoculum that could cause new infections in the spring and is a key factor in managing this disease.

Ramorum blight Adobe PDF icon, also known as sudden oak death (SOD) and ramorum dieback.  Since 1995, oaks and tanoaks have been dying in the coastal counties of California.  Since then, surveys found other plants infected or associated with this disease caused by the water mold, Phytophthora ramorumResearchers in the U. S. first isolated the pathogen in Mill Valley (Marin County) on tanoak, but since that time additional surveys confirmed the pathogen on various native hosts in fourteen coastal California counties and in Curry County, Oregon.  Through ongoing surveys of nurseries, USDA-APHIS-PPQ continues to define the extent of the pathogen’s distribution in the U. S. and limit its artificial spread beyond infected areas through quarantine and a public education program.

Status of Phytophthora ramorum in 2008

There are no updates for 2008 at this time.

Federal Regulation, State Inspection, Nursery Survey, and Other Finds.  There was no report this month.

Forest Detection Survey.  There was no report this month.

Reported by Dan Gillman, Plant Pathologist, UMass Extension Plant Diagnostic Lab, Amherst

WEEDS -

Weeds are dormant and/or snow covered.  Brush up on your weed identification skills by visiting the UMass Extension Weed Herbarium online at www.umassextensionweedherbarium.org

Reported by Randall Prostak, Weed Specialist, UMass Extension Landscape, Nursery and Urban Forestry Program, Amherst.

LANDSCAPE TURF

DISEASES -

No report this month.

INSECTS -

No report this month.

WEEDS -

No report this month.

IMPORTANT INFORMATIONAL RESOURCES

For a complete listing of upcoming events, see our Conferences and Workshops page.


Attention Massachusetts Schools and Daycare Facilities: Training for Grounds Managers and Public Officials on the Implementation of Cost Effective IPM Guidelines for Turf, Landscapes and Indoor Pests

April 1, 2008   -  Holiday Inn - Marlborough, MA

Massachusetts schools and daycare facilities are required by the Children and Families Protection Act to have IPM (Integrated Pest Management) plans for both grounds and buildings. This optional training program recognizes the restrictive budget environment of daycare facilities and schools and provides information that combines practical pest management strategies to prevent or control pests in ways that reduce risks to health and the environment while addressing the fiscal issues faced by these facilities and municipalities. While some of the content is a repeat of last year's informative program, we're offering new this year:

  • School and Sports Turf IPM: Using Protocols to Develop, Practice, and Evaluate an IPM System
  • How to File a School IPM Plan

This program is EEC approved (5 credits) and meets the requirement under 102 CMR 7.08(4)(e)(1)(b). Two pesticide contact hours will be awarded in categories 36, 37, 41 and Applicators License.

To register by mail with check or PO#:
 
To register online with credit card:

Contact UMass Extension at (413) 545-0895 or eweeks@umext.umass.edu.


Don't forget to visit the UMass Extension Online Weed Herbarium!

2008-2009 Professional Management Guide for Insects, Diseases and Weeds of Trees and Shrubs in New England - Pesticide label registration changes every year in all states and you can only legally apply pesticides according to the current year's label. This updated 2008-09 guide tells you what is current and legal for use in all the New England states and is the way for you to stay current with pesticide information. If you already have the 2003 version, this is the updated supplement for pesticide information. Remember, if you're a pesticide applicator, it's the law! Created by UMass Extension professionals, this manual offers the latest on virtually all the insects, diseases, and weeds of woody plants in New England; current and legal listings of chemical compounds labeled for the management of these pests; Integrated Pest Management (IPM) considerations for most of these pests; environmentally friendly alternatives in pest management such as horticultural oils, soaps, biologicals, etc.; and Growing Degree Day (GDD) information for most of the insect pests of woody plants. Click here to order online from the UMass Extension Bookstore External link or contact (413) 545-0895; eweeks@umext.umass.edu for information.

Planting and Maintaining Sustainable Landscapes: A Guide for Public Officials and the Green Industry - An updated and reprinted collection of fact sheets, including Trees and Shrubs for Low Maintenance Landscapes; Recommendations for Planting and Maintaining Trees and Shrubs; Integrated Pest Management and Plant Health Care; Streetscape Design and Planting; Selecting Turfgrasses for Low Maintenance Sites; Turf Pesticides and the Environment; Children's Protection Act and School IPM Plans; and Guidelines for Planting within the 100 Foot Wetland Buffer. Click here to order online from the UMass Extension Bookstore External link or contact (413) 545-0895; eweeks@umext.umass.edu for information.

DIAGNOSTIC SERVICES

UMass Laboratory Diagnoses Turf and Landscape Problems - Accurate diagnosis for a turf or landscape problem can often eliminate or reduce the need for pesticide use. The UMass Extension Plant Diagnostic Lab is available to serve commercial landscape contractors, turf managers, arborists, nurseries and other green industry professionals. It provides woody plant and turf disease analysis, woody plant and turf insect identification, turfgrass identification, weed identification, and offers a report of pest management strategies that are research based, economically sound and environmentally appropriate for the situation. Send specimens and payment (payable to the University of Massachusetts) to UMass Extension Plant Diagnostic Lab, Holdsworth Natural Resources Center, 160 Holdsworth Way, UMass, Amherst, MA 01003. The fee for a woody plant disease analysis is $50; the fee for turf disease analysis or nematode assay is $75. All insect, weed and turfgrass identification samples are $25 each. For more detailed submission instructions see http://www.umass.edu/agland/diagnostics External link

Soil and Plant Tissue Testing - The University of Massachusetts Soil and Plant Tissue Testing Laboratory is located on the campus of The University of Massachusetts at Amherst. Testing services are available to all. The function of the Soil and Plant Tissue Testing Laboratory is to provide test results and recommendations that lead to the wise and economical use of soils and soil amendments. For complete information, visit the UMass Soil and Plant tissue Testing Laboratory web site at: http://www.umass.edu/plsoils/soiltest External link Alternatively, call the lab at (413) 545-2311.


NEXT UPDATE: The next issue will be available on April 3, 2008.

This message is produced by the UMASS Extension, Landscape, Nursery and Urban Forestry Program. The copy is prepared by Anna Greene from data and reports provided by the staff and faculty of the UMass Landscape, Nursery and Urban Forestry Program and the UMASS Extension Turf Program as well as cooperating horticulturists and Green Industry professionals. The text is adapted for access via the Internet by Jason Lanier.

DISCLAIMER. This message is intended for commercial use. UMass Extension assumes no liability for recommendations. It is the responsibility of the applicator to verify the registration status of any pesticide BEFORE applying it. Different states have different regulations as well. The use of trade names (™) does not imply endorsement. Similarly, there may be other products you prefer to use.

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