( Helfand et al., 2006 ). The shrubs meadowsweet and steeplebush are native to eastern North America, and can be found growing from the Gulf States into Canada ( U.S. Department of Agriculture, 2007 ). Meadowsweet and steeplebush grow to be 1 to 1.5 m tall
, respectively. Trees can also cast considerable shade. Based on these varying light patterns, there is demand for shade-adapted flowering plants in urban landscapes ( Schwartz, 1997 ). The native shrubs S. alba (meadowsweet) and S. tomentosa (hardhack or
The native shrubs Spiraea alba (meadowsweet) and S. tomentosa (hardhack or steeplebush) grow to be 1 to 1.5 m tall with long-lasting terminal inflorescences (white and pink flowers, respectively) present throughout most of the summer. Both
Abstract
Hexazinone was applied preemergent, after pruning, at 1.1, 2.2, 4.5, or 9.0 kg/ha to a commercial lowbush blueberry (Vaccinium angustifolium Ait.) field. Visual ratings indicated a quadratic decline in grasses and a linear increase in blueberry injury associated with hexazinone application. Counts of weed populations showed a highly significant linear decline in meadowsweet (Spiraea latifolia Borkh.) and goldenrod (So-lidago sp.) with an increase in hexazinone rate. Hexazinone treatments did not affect the density of blueberry stems, but flower buds and yield followed a quadratic trend. Hexazinone provided excellent control of many common weed species accompanied by a significant increase in blueberry yield. Chemical name used: 3-cyclohexyl-6-(di-methylamino)-1-methyl-1,3,5-triazine-2,4(1H,3H)-dione (hexazinone).
. thunbergia for DNA extraction (yellow arrows: broken ovisacs). Spiraea , commonly known as spirea or meadowsweet, is a genus of ornamental plants under the Rosaceae family. Approximately 100 to 120 Spiraea species were known worldwide and were
Invasive species. 28 Mar. 2012. < http://www.gencourt.state.nh.us/rules/state_agencies/agr3800.html > Stanton, K.M. Weeks, S.W. Dana, M.N. Mikelbart, M.V. 2010 Pruning of meadowsweet and steeplebush HortTechnology 20 4 700 704 10.21273/HORTTECH.20.4.700 The
, eight [three clematis species, chinese pear, bridalwreath spiraea ( Spiraea prunifolia ), thunberg’s meadowsweet ( Spiraea thunbergii ), ‘Regal’ bukhara fleeceflower ( Polygonum baldschuanicum ), and carolina fanwort ( Cabomba caroliniana )] are not
) evaluated the water stress responses of Spiraea alba (meadowsweet) and Spiraea tomentosa (steeplebush) under greenhouse conditions and found that both species had reduced growth, transpiration, and predawn water potential, but that they exhibited the