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2011 | Umass Extension Landscape Nursery & Urban Forestry UMass Extension Landscape Message #11 - 2011 | UMass Extension Landscape Nursery & Urban Forestry | UMass Amherst UMass Amherst UMass Amherst Center for UMass Extension Agriculture Home About Services Landscape Message Weed Herbarium Publications & Resources Education News & Events UMass Extension Landscape Message #11 - 2011 May 13, 2011 Quick Links Scouting Information by Region Scouting Information Regional Notes Regional Notes Cape Cod Cape Cod Region (Barnstable) – General Conditions: Overall, the week has been chilly, windy, and wet as a stalled storm system rotated nasty weather back onto the Cape. Friday and Saturday were nice days, Southeast weather wise, but it has been more like March than May since then. Landscapes are looking soggy. Cool East temperatures have slowed down plant development. Pests/Problems: High winds stripped many emerging Metro West leaves from trees over the past few days. Winter moth caterpillars are feeding but overall the infestation is Central spotty. Reports from Brewster indicate fairly high numbers while observations in Marstons Mills show lowered Pioneer Valley numbers. hemlock wooly adelgid egg masses are noticeable. Treatment for black turpentine beetle should be Berkshire wrapping up. The gelatinous orange galls of cedar-apple rust are becoming visible on eastern red cedar. Environmental Data Slugs and snails are abundant. We have had a good infection period for dogwood anthracnose and apple Phenology scab with the prolonged damp weather. Woody Ornamentals Southeast Region (Hanson) - General Conditions: Hanson received 0.60 inches of rain this past week Landscape Turf and the weather continued to be cool extending the bloom of many spring flowering plants. Halesia sp. (Silverbell), Kwanzan cherry, Crabapples, Lilac, dogwood, Cercis canadensis (Eastern Redbud), Viburnum Archived Messages carlesii (Mayflower Viburnum), Viburnum x burkwoodii ‘Mohawk’, R. schlippenbachii (Royal Azalea), Exochorda (Pearlbush), Spiraea prunifolia (Bridalwreath Spirea), Pieris japonica, Pieris floribunda (Mountain Pieris), Fothergilla major (large fothergilla), Fothergilla gardenii (dwarf Fothergilla), Kerria, Daphne tangutica, Daphne x burkwoodii ‘Carol Mackie’, Iberis sempervirens, Epimedium sp., Trillium sp., Tulips, Narcissus, Convallaria majalis (Lily-of-the-valley), Euphorbia polychroma, Brunnera macrophylla, Phlox subulata, Arisaema sp., H. x hybridus, H. foetidus, Corydalis lutea, Corydalis scouleri, Primula sp., Pulmonaria, Ajuga, bearded Iris, Sweet woodruff, Polygonatum sp. (Solomon’s Seal), Saruma henryi, Lamium, Lunaria annua (honesty or money plant), Hyacinth, Tiarella cordifolia (Foam Flower), Lamium, Dicentra eximia, Mertensia virginica (Virginia bluebells), Violets, and Vinca minor are in full bloom. Flowering Quince and Pieris 'Brouwer's Beauty' are ending bloom. Rhus ‘Tiger Eyes’ and Cotinus coggyria are finally starting to leave out. Chionanthus virginicus, as always, is late to leaf out, looks to someone unfamiliar with it, like a dead shrub in the landscape. Japanese maples and Hosta have leafed out providing nice foliage color. Pests/Problems: As of right now, damage by winter moth caterpillars appears to be down this year, however, it may be too early to tell. Some Norway maples appear to have little damage while a few have foliage resembling Swiss cheese. Some Japanese maples are also showing damage. Winter moth caterpillars were found in second, third and fourth instar, and in some instances, fifth, and all on the same leaf! Winter moth caterpillars were found feeding on the foliage of maples (Norway, sugar, paperbark, red and Japanese), roses, Amelanchier, beech, oaks, birch, crabapples, apples and blueberries. They were also found feeding inside the developing fruit of European beech tree. Wasps and hornets, carpenter bees, honey bees, carpenter ants, mason bees, lily leaf beetle adults, Hemlock woolly adelgid, black flies, mosquitoes, deer and dog ticks are all active. Have not seen many ‘tents’ of Eastern tent caterpillar. Beneficial insects are also active. Barberry, one of the Massachusetts invasive plants is in full bloom. Autumn olive, burning bush and Oriental bittersweet will soon be blooming. If warranted, prune or remove the plants now to reduce potential seed production. Ground ivy, buttercups, veronica, violets, chickweed, wild mustard, and dandelions are in full bloom. Continue to check for deer and dog ticks frequently, especially after yard cleanups or walking through tall grass. East Region (Boston) – General Conditions: We are experiencing a typical New England spring; we have had precipitation six out of the last seven days, but totaling less than an inch. We had an average high temperature of 64.8 °F, but with the winds, it seems quite cooler. We gained 46.5 GDDs compared to 73 gained during this week in 2010. Despite the weather, spring pushes forward with color in full force. Shrubs in bloom include: Andromeda [A. glaucophylla (downy andromeda) and A. polifolia ‘Blue Ice‘ (bog rosemary)], Berberis sp. (barberry), Cotoneaster apiculatus (cranberry cotoneaster), Daphne cneorum ‘Ruby Glow’ (Rose Daphne), Elaeagnus multiflora (cherry elaeagnus), Exochorda ‘The Bride’ (pearlbush), Fothergilla major (large fothergilla), Ilex rugosa (prostrate holly), Kerria japonica (Japanese kerria), Leucothoe [L. http://extension.umass.edu/landscape/message/lm-112011[5/23/2012 12:52:15 PM] UMass Extension Landscape Message #11 - 2011 | UMass Extension Landscape Nursery & Urban Forestry | UMass Amherst axillaris (coast leucothoe), L. fontanesiana (drooping leucothoe) and L. recurva (fetterbush)], Lonicera chrysantha (coralline honeysuckle), Poncirus trifoliata (trifoliate orange), Rhododendron [R. canadense (Rhodora), R. kaempferi (torch azalea) and R. vaseyi (pinkshell azalea)], Rhus aromatica (fragrant sumac), Vaccinium [V. angustifolium (lowbush blueberry) and V. corymbosum (highbush blueberry)], Viburnum [V. bitchiuense (Bitchiu viburnum), V. x burkwoodii (Burkwood viburnum), V. carlesii (Korean spice viburnum), V. lantana (wayfaring tree), V. rhytidophyllum (leatherleaf viburnum), V. x rhytidophylloides (lantanaphyllum viburnum) and V. utile (service viburnum)] and Weigela [W. florida (old fashioned weigela), W. hortensis (gardeners weigela), W. praecox (early weigela) and Weigela subsessilis (weigela)]. Trees in bloom include: Betula nigra (river birch), Caragana franchetiana (Franchet peashrub), Cercis canadensis (Eastern redbud), Quercus sp. (oak) and Sorbus yuana. Convallaria majalis (lily of the valley) and Dicentra sp. (bleeding heart) are flowering throughout the grounds. Vines in flower: Akebia quinata (fiveleaf akebia), Clematis alpina (alpine clematis), Schisandra chinensis (magnolia-vine) and Wisteria sinensis (Chinese Wisteria). Interesting and unusual plants in bloom: Davidia involucrata (Dove Tree), Halesia tetraptera (Carolina silverbell), Orixa japonica (Japanese orixa) and Staphylea trifolia (American bladdernut). Pests/Problems: Weeds continue to flower and some have started (and continue) to seed including an array of winter annuals, Poa annua (annual bluegrass) and Taraxacum sp. (dandelion). Alliaria petiolata (garlic mustard) remains in flower, giving an extended period of time to allow for proper management of the plant. Imported willow leaf beetle (Plagiodera versicolora) adults have begun munching on willows. Winter moth (Operophtera brumata) is abundant throughout the grounds, but particularly on maple (Acer sp.), linden (Tilia sp.), horsechestnut (Aesculus sp.) and oak (Quercus sp.). Azalea sawfly has hatched as these first instar larvae begin to feed. European pine sawfly (Neodiprion sertifer) eggs have been spotted and are almost ready to hatch. Hemlock woolly adelgid (Adelges tsugae) are highly visible in the landscape. Hydrangea leaf tier (Olethreutes ferriferana) continues to hatch, continues to bind leaves for shelter and ultimately continues feeding on the leaves. Berberis thunbergii (Japanese barberry) is in flower. Metro West (Acton) – General Conditions: We gained 35.5 growing degree days this past week.Trees in bloom include Amelanchier spp. (Shadbush, Serviceberry), Cercis canadensis (Redbud), Halesia spp. (Silverbell), Magnolia x loebneri ‘Leonard Messel’and M. ‘Yellow Lantern’, Malus spp. (Apple, Crabapple), Prunus serrulata ‘Kwanzan’(Kwanzan Cherry), P. serotina (Black Cherry) and Pyrus spp. (Pear). Shrubs in bloom include Chaenomeles speciosa (Common Flowering Quince), Daphne burkwoodii ‘Carol Mackie’ (Carol Mackie daphne), Fothergilla gardenii (Dwarf Fothergilla), F.major (Large Fothergilla), Rhododendron ‘Black Satin’, R. ‘Pink Diamond’, R. schlippenbachii (Royal Azalea), R. vaseyii (Pinkshell Azalea), Spiraea thunbergii (Thunberg Spirea), Vaccinium angustifolium (Lowbush Blueberry)and Viburnum x burkwoodii (Burkwood Viburnum). Perennials and spring ephemerals in bloom include: Arisaema triphyllum (Jack-in-the-Pulpit), Asarum canadense (Canada Wild Ginger), Aurinia saxatilis (Basket of Gold), Bergenia cordifolia (Pig Squeak), Caltha palustris (Marsh Marigold), Chionodoxa luciliae (Glory of the Snow), Claytonia virginica (Virginia Spring Beauty), Crocus spp. (Crocus), Dicentra canadensis (Squirrel Corn), D. cucullaria (Dutchman’s Breeches), D. spectabilis (Old Fashioned Bleeding Heart), Epimedium spp. (Barrenwort), Gallium odorata (Sweet Woodruff), Helleborous niger (Christmas Rose), Hyacinthus sp. (Hyacinth), Iris germanica (Dwarf Bearded Iris), Linaria annua (Money Plant), Mertensia virginica (Virginia Bluebells), Muscari sp.
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