Landscape Message: August 6, 2021 Umass Extension Landscape, Nursery and Urban Forestry Program(/Landscape)
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Visit T Apply Give Center for Agriculture, Food, and the EnvironmentSearch (/) UMass.edu UMass Extension Landscape, Nursery and Urban Forestry Program (/landscape) Search CAFE LNUF Home (/landscape) About (/landscape/about) Newsletters & Updates (/landscape/newsletters-updates) Publications & Resources (/landscape/publications-resources) Services (/landscape/services) Education & Events (/landscape/upcoming-events) Make a Gift (https://securelb.imodules.com/s/1640/alumni/index.aspx? sid=1640&gid=2&pgid=443&cid=1121&dids=2540) Landscape Message: August 6, 2021 August 6, 2021 Issue: 15 UMass Extension's Landscape Message is an educational newsletter intended to inform and guide Massachusetts Green Industry professionals in the management of our collective landscape. Detailed reports from scouts and Extension specialists on growing conditions, pest activity, and cultural practices for the management of woody ornamentals, trees, and turf are regular features. The following issue has been updated to provide timely management information and the latest regional news and environmental data. The Landscape Message will be updated bi-monthly in August. The next message will be posted on August 20. To receive immediate notication when the next Landscape Message update is posted, be sure to join our e-mail list (/landscape/email-list) To read individual sections of the message, click on the section headings below to expand the content: Scouting Information by Region Environmental Data The following data was collected on or about August 4, 2021. Total accumulated growing degree days (GDD) represent the heating units above a 50° F baseline temperature collected via regional NEWA stations for the 2021 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. Soil Temp GDD (°F at 4" MA depth) Precipitation Time/Date of Region/Location 2-Week Gain Readings 2-Week 2021 Total Sun Shade Gain CAPE 276 1569.5 69 65 0.21 12:00 PM 8/4 SOUTHEAST 262 1627 73 68 0.50 5:30 PM 8/4 NORTH SHORE 271.5 1704 67 63 1.16 10:30 AM 8/4 EAST 278.5 1723.5 72 68 0.93 5:00 PM 8/4 METRO 251.5 1614 64 63 1.00 6:15 AM 8/4 CENTRAL 260.5 1666.5 68 64 1.80 7:00 AM 8/4 PIONEER VALLEY 260.5 1685.5 69 65 0.95 11:00 AM 8/4 BERKSHIRES 214 1384 69 61 3.48 7:00 AM 8/4 AVERAGE 259 1622 69 65 1.25 _ n/a = information not available As of 8/3, there is a "moderate drought" status for the mid Cape and Nantucket and an "abnormally dry" status for the upper and lower Cape: https://droughtmonitor.unl.edu/CurrentMap/StateDroughtMonitor.aspx?MA (https://droughtmonitor.unl.edu/CurrentMap/StateDroughtMonitor.aspx?MA) Municipal water restrictions map dated 7/29: https://www.mass.gov/doc/water-use-restrictions- map/download (https://www.mass.gov/doc/water-use-restrictions-map/download) Phenology INDICATOR PLANTS - STAGES OF FLOWERING (BEGIN, BEGIN/FULL, FULL, FULL/END, END) PLANT NAME (BOTANIC / CAPE S.E. N.S. EAST METRO W. CENT. P.V. BERK. COMMON) Polygonum * Begin * * * * * * cuspidatum (Japanese knotweed) Clethra Begin/Full Full Begin/Full Full Full Full Full * alnifolia (summersweet clethra) Hydrangea Full Begin/Full Begin/Full Full Full Full Begin/Full Begin/Full paniculata (panicle hydrangea) Hibiscus Full Full/End Full Full Full Full/End Full/End Full syriacus (rose- of-Sharon) Lythrum Full Full/End Full Full Full Full Full/End Full salicaria (purple loosestrife) Campsis Full/End End End Full Full Full Full/End Full radicans (trumpet vine) Oxydendrum Full/End Full/End Full/End Full Full/End Full/End Full/End * arboreum (sourwood) Buddleia Full/End End Full/End Full Full/End Full/End Full/End Full/End davidii (buttery bush) * = no activity to report/information not available Regional Notes Cape Cod Region (Barnstable) General Conditions: The average temperature for the period from July 21 thru Aug. 4 was 70˚F with a high of 88˚F on July 27 and a low of 53˚F on August 1. The period has been dominated by mostly sunny days with highs in the 70s and lows in the 60s. Less than a quarter inch of precipitation fell during the two-week period, occurring on July 30 and August 2. Soil moisture is short and the US drought monitor lists portions of the Cape abnormally dry and portions in moderate drought. Woody plants seen in bloom the past two weeks include sourwood, rose of Sharon, chaste tree, mimosa, summersweet, buttery bush, as well as oak, panicle and bigleaf hydrangeas. Herbaceous plants seen in bloom during the period include daylily, liatris, echinacea, shasta daisy, coreopsis, lavender, hosta, Salvia yangii (previously known as Perovskia atriplicifolia, commonly called Russian sage), creeping bellower, achillea, buttery weed, Baptisia tinctoria, veronicastrum, blue vervain, beebalm, garden phlox, black-eyed Susan, balloon ower, and cutleaf coneower. Pests/Problems: Insect pests or damage seen include Japanese beetle on various plants, daylily leafminer damage on daylily, euonymus scale on euonymus, white prunicola scale on lilac, scale on tupelo, black turpentine beetle on pitch pine, pine tip moth on pitch pine (causing signicant damage on young trees across mid and outer Cape), hibiscus sawy on hardy hibiscus, thrips on gladiolus and crocosmia, azalea lacebug on azalea, andromeda lacebug on andromeda, oak shothole leafminer damage on oak, eriophyid mites on black cherry, tupelo, and birch. After several seasons of high lecanium scale populations, it is now dicult to nd in the areas I have scouted. Plant disease symptoms or signs observed during the period include maple anthracnose, sycamore anthracnose, both powdery and downy mildews and black spot on rose, leaf spot on river birch, apple scab and cedar-apple rust on crabapple, aster yellows on purple coneower, cercospora leaf spot on hydrangea, powdery mildew on smokebush, dogwood, and numerous perennials, anthracnose on dogwood, guignardia leaf blotch on horsechestnut, and needlecast on pitch pine. Physiological leaf scorch is showing up on dogwoods due to low soil moisture. Weeds and wildowers seen in bloom were sheep’s bit (Jasione montana), spotted knapweed, rabbitfoot clover, chicory, carpetweed, prostrate spurge, Pennsylvania smartweed, annual eabane, pokeweed, white clover, birdsfoot trefoil, yellow toadax, Queen Annes’ lace, goldenrod, pepperweed, horseweed, tansy, pilewort, cat’s ear, and narrowleaf plantain. Don’t forget to protect yourself from mosquitoes and ticks. Rabbits continue to be a landscape problem for most people. Southeast Region (Dighton) General Conditions: It's been hard to nd fault with the weather over the past two weeks, presented with mild days and frequent light showers in the evening. Remarkably, even unirrigated lawns are still green and show few signs of stress. In a more typical summer most lawns would already be drought dormant. Among the many plants in ower, I've noticed these: Acalypha virginica (Virginia copperleaf), Albizia julibrissin (mimosa), Alcea rosea (hollyhock), Ambrosia artemisiifolia (annual ragweed), Asclepias incarnata (swamp milkweed), Vernonia noveboracensis (New York ironweed), Buddleia davidii (buttery bush), Campanula rapunculoides (creeping bellower), Campsis radicans (trumpet vine), Centaurea stoebe (spotted knapweed), Cirsium arvense (Canada thistle), Clethra alnifolia (summersweet), Daucus carota (Queen Anne's lace), Echinacea purpurea (purple coneower), Eutrochium purpureum (Joe-pye-weed), Hemerocallis (daylily), Hibiscus syriacus (rose of Sharon), Hosta spp. (plantain lily), Hydrangea macrophylla (bigleaf hydrangea), H. paniculata (panicled hydrangea), Hypericum perforatum (St. John's wort), Impatiens capensis (jewel weed), Iliamna rivularis (streambank wild hollyhock), Liatris spicata (blazing star), Lilium lancifolium (tiger lily), L. orientalis (Oriental lily), L. superbum (Turk's cap lily), Linaria vulgaris (toadax), Lotus corniculatus (bird’s-foot trefoil), Lysimachia clethroides (gooseneck loosestrife), Monarda spp. (beebalm), Nuphar lutea (spadderdock, yellow water lily), Nymphaea odorata (American white water lily), Oenothera biennis (evening primrose), Oxydendrum arboreum (sourwood), Phlox paniculata (garden phlox), Hieracium pilosella (yellow hawkweed), Pontederia cordata (pickerel weed), Rosa 'Knockout', Rudbeckia hirta (black-eyed-Susan), Salvia yangii (Russian sage), Sedum 'Autumn Joy', Solidago spp. (goldenrod), Spiraea alba (meadowsweet), Tanacetum vulgare (Tansy), and Vitex agnus-castus (chaste tree). Pests/Problems: Crabgrass now has several tillers. The following invasive plants are in ower: Lythrum salicaria (purple loosestrife), Japanese knotweed (Reynoutria japonica, syn. Fallopia japonica, Polygonum cuspidatum), Phragmites australis (common reed), Artemisia vulgaris (mugwort), Cyperus esculentus (yellow nutsedge), Calystegia sepium (hedge bindweed), and Erigeron canadensis (horseweed). North Shore (Beverly) General Conditions: This two-week period was mild with scattered rain showers on some days. Approximately 1.16 inches of rain were recorded at Long Hill during this period. Air temperature ranged from low 50s to mid 80s. The average daily temperature was 69℉. The average daily maximum temperature was 78°F and the daily minimum temperature was 61℉. The maximum temperature of 88℉ was recorded on July 26 and the minimum temperature of 56℉ was recorded on August 2. Woody plants seen in bloom include: bottlebrush buckeye (Aesculus parviora), the bee-bee tree or Korean evodia (Tetradium daniellii), sourwood (Oxydendrum arboreum),