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Visit 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: May 28, 2021 May 28, 2021 Issue: 8 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 weekly in June. The next message will be posted on June 4. 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 May 26, 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 (1-Week Gain) Readings 1-Week 2021 Total Sun Shade Gain CAPE 74.5 238 63 58 0.06 12:00 PM 5/26 SOUTHEAST 92 280 82 65 0.15 3:30 PM 5/26 NORTH SHORE 126.5 334 62 56 0.05 10:00 AM 5/26 EAST 122.5 351.5 69 62 0 4:00 PM 5/26 METRO 121.5 326.5 64 57 0 5:45 AM 5/26 CENTRAL 123.5 342.5 70 68 0.23 3:00 PM 5/26 PIONEER VALLEY 124 342 66 58 0 11:00 AM 5/26 BERKSHIRES 113.5 247 63 60 0.02 8:00 AM 5/26 AVERAGE 112 308 67 60 0.06 _ n/a = information not available Check the drought status as of 5/25 here: https://droughtmonitor.unl.edu/CurrentMap/StateDroughtMonitor.aspx?MA (https://droughtmonitor.unl.edu/CurrentMap/StateDroughtMonitor.aspx?MA) Current municipal water restrictions are shown on this map: 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) Enkianthus * * Full Begin * Full Full Begin campanulatus (redvein enkianthus) Rhododendron Begin/Full Full/End Full/End Full Full Begin/Full Full * catawbiense (Catawba rhododendron) Deutzia spp. Begin/Full End Full Full Full Full Full Begin/Full (deutzia species) Aesculus Full Full Full Full Full Begin/Full Full Full hippocastanum (common horsechestnut) Rhododendron Full/End * Full/End Full/End Full Full Full Full carolinianum (Carolina rhododendron) Elaeagnus End End * End Full/End Full/End Full/End Full umbellata (autumn-olive) Spiraea x Full/End Full/End Full/End Full/End Full/End Full/End Full/End Full vanhouttei (Vanhoutte spirea) Syringa vulgaris End Full/End End End End End End Full (common lilac) Cornus orida Full/End End Full/End Full/End Full/End Full/End Full/End Full/End (owering dogwood) Rhododendron End End Full/End Full Full/End Full/End End Full/End spp. (early azaleas) * = no activity to report/information not available Regional Notes Cape Cod Region (Barnstable) General Conditions: The average temperature for the period from May 19 – May 26 was 60˚F with a low of 44˚F on May 21 and a high of 86˚F on May 23. The period was mostly sunny and there was no signicant precipitation. Weather conditions have been favorable, with late spring and some summer like conditions. The lack of precipitation is a concern; the last signicant rainfall was on May 10. The lack of soil moisture is troubling, especially for tilled, disturbed or sandy soils. Make sure new plantings are being watered properly. Herbaceous plants seen in bloom the past week include columbine, bearded iris, lupine, bloodred geranium, lily of the valley, Solomon’s seal, vinca vine, fringed bleeding heart, sweet woodru, painted daisies, and allium. Woody plants in bloom include wisteria, beach plum, ame azalea, doublele viburnum, Korean spice viburnum, dwarf fothergilla, weigelia, and golden chain tree. Oak pollen is abundant. Now is the time to pinch herbaceous plants like chrysanthemum, aster, and goldenrod. Pests/Problems: Insect pests or damage seen over the period include winter moth damage to maples (holes in leaves), rose (holes in leaves), blueberry (ower damage and holes in leaves), and apple (ower damage and holes in leaves); viburnum leaf beetle larvae on viburnum, hydrangea leaftier on smooth leaf hydrangea, columbine leaf miner on columbine, rose slug sawy larvae on rose, Japanese maple scale on privet, lilac borer damage on privet, white prunicola scale on lilac, lecanium scale on white oak, boxwood leafminer adults emerging on boxwood, iris borer on bearded iris and aphids on numerous woody and herbaceous species. Disease symptoms or signs observed during the period have been limited; armillaria on privet and sycamore anthracnose on sycamore. Invasive plants in bloom include burning bush, autumn olive, bush honeysuckles, garlic mustard, and cypress spurge. Weeds in bloom include buttercup, narrowleaf plantain, red sorrel, black medic and white clover. Rabbits and deer ticks are abundant. Southeast Region (Dighton) General Conditions: We've had some very pleasant cool crisp weather interspersed with a couple of days in the 80's. Passing showers and threatened thunderstorms have produced very little in the way of addressing the lack of soil moisture. It's been fairly breezy as well. All in all, these have been comfortable conditions for humans to be outdoors but we are already in desperate need of rain for most of the other life forms. On a positive note, I'm not seeing any powdery mildew or other fungus problems that appear when there is free water on leaves. Even here on the water, there hasn't been morning dew in several weeks. It's dry enough that anthracnose infected sycamore trees are beginning to have a bit more than just a terminal leaf, something that doesn't usually occur until summer. Among the many plants I've noticed in ower are the following: Achillea millefolium (common yarrow), A. x 'Moonshine', Allium spp.(owering onion), Aquilegia (columbine), Aesculus hippocastanum (horse chestnut), Baptisia australis (blue indigo), Coreopsis spp. (tickseed), Chionanthus virginicus (white fringetree), Chelidonium majus (greater celandine), Conium maculatum (poison hemlock), Convallaria majalis (lily of the valley), Cotinus coggygria (smoke bush), Cornus kousa (Chinese dogwood), C. sericea (redtwig dogwood), Cytisus scoparius (Scotch broom), Dianthus spp. (pinks), Deutzia, Euonymus alatus (winged euonymus, burning bush), Euphorbia epithymoides (yellow spurge), Geranium maculatum (wild geranium), G. sanguineum (cranesbill geranium), Hesperis matronalis (dame's rocket), Heuchera (coral bells), Hyacinthoides hispanica (wood hyacinth), Iris germanica (German iris), I. pseudacorus (yellow ag iris), I. sibirica (Siberian iris), Kalmia latifolia (mountain laurel), Kerria japonica 'pleniora', Laburnum anagyroides (golden rain tree), Lamprocapnos spectabilis (bleeding heart), Leucanthemum vulgare (oxeye daisy), L. x superbum (shasta daisy), Lonicera morrowii (Morrow's honeysuckle), L. sempervirens (Japanese honeysuckle), L. tatarica (Tatarian honeysuckle), Lupinus (lupine), Myosotis (forget-me-not), Nepeta spp. (catmint), Osmunda claytoniana (interrupted fern), Ornithogalum (star of Bethlehem), Paeonia (peony) Papaver orientale (oriental poppy), Paulownia elongata (empress tree), Phlox subulata (creeping phlox), Pilosella (hawkweed), Polygonatum biorum (Solomon's seal), Prunus serotina (black cherry), Vaccinium corymbosum (highbush blueberry), Viburnum x burkwoodii (Burkwood viburnum), V. plicatum, (double-le viburnum), Viola papilionacea (common violet), V. tricolor (Johnny-jump-up), Vinca minor (periwinkle), Ranunculus repens (creeping buttercup), Rheum rhabarbarum (rhubarb), Robinia pseudoacacia (black locust), Rosa rugosa (beach rose), R. 'Knockout Rose', Rhododendron catawbiens (evergreen and semi-evergreen azaleas), Salvia nemorosa (perennial sage), Silene latifolia (white campion), Spiraea prunifolia (bridal wreath spirea), Syringa vulgaris (common lilac), S. x persica (Persian lilac), Trifolium repens (white clover), Weigela, and Wisteria sinensis. Pests/Problems: I fear the beginnings of a drought so deep even your dreams will be wilted. Unless we get some signicant precipitation, the rst heat wave will be devastating. North Shore (Beverly) General Conditions: Dry conditions persisted during this period. The weather was sunny, dry and warm with little cloud cover. The average daily temperature for this period was 67˚F. The highest temperature during this reporting period was 87˚F, recorded on May 26, and the lowest temperature was 49˚F recorded on May 20. A quick, light shower passed through on May 24 and dropped just 0.05