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Photos of its beautiful blossoms grace the s of slick gardening magazines and catalogs, television programs and garden center displays. Garden writers laud the butterfly bush as a fast-growing, robust, easy-to-grow shrub that attracts a wide variety of butterflies. But there's a dark side to this popular plant. Butterfly bush can be a very aggressive, or invasive non-native shrub that, in certain situations, can overtake native vegetation, according to horticulturists with the Oregon State University Extension Service and weed biologists with Oregon's Department of Agriculture ODA.
Its strategic plan includes efforts to eradicate butterfly bush in the wild, but not from people's yards. Butterfly bush is extremely invasive in natural areas. It has spread to most of the counties in western Oregon and Washington. It has been a huge problem in England, where it is one of the top 20 weeds, having overtaken large tracts of disturbed land 50 years after it was introduced from China.
It is a terrible problem in New Zealand as well, especially in areas prone to frequent flooding.
In reviewing the scientific literature about the invasiveness of butterfly bush in the United Kingdom, the OSU researchers found that seed there requires a long time to develop and release from the plant. British researchers have discovered that flower he from a summer do not release seed until dry weather occurs the following spring, said Altland. Practically applied, this means that if nurseries and home gardeners prune all the spent blossoms off their butterfly bushes in the fall, it is a way of controlling the release of seed from the plant.
Altland and Ream are conducting trials on five cultivars of butterfly bush commonly produced in Oregon to see exactly when seeds are released in the Willamette Valley, as seed releases may be slightly different from England. They also conducted research on the soils, and habitat of butterfly bush-infested sites to determine and describe what factors favor these infestations in Oregon. So far, they have found butterfly bush infestations in a wide variety of sites, from floodplains to mountain slopes, said Altland. They found the densest infestations in burned sites in reforestation areas and in frequently disturbed floodplains and riparian areas.
They found few escaped seedlings from nurseries, as production nurseries often cut back plants at the end of the year to encourage branching. Both OSU and ODA scientists are encouraging home gardeners to pay close attention to choosing butterfly bushes that are cultivated varieties, not the straight wild species Buddleia davidii. Only this species Buddleia davidii, not specially bred cultivars are subject to Oregon's noxious weed listing.
It is most commonly seen growing wild along roides, in riparian areas and in forest openings. Some cultivars have been found to produce much less seed than others. For example, a study at Longwood Gardens in southern Pennsylvania found large differences in the amount of viable seed produced by B. The study also found that a single flower cluster of 'Potter's Purple' was found to produce more than 40, seeds.
In the Longwood study, some Buddleia species and hybrids produced fewer viable seeds than B. If you already have butterfly bush on your property or are planning on planting some soon, there are ways to keep it in control. Don't let Buddleia go to seed. Deadhead, or clip off all flower he in the fall. Do not wait until spring. Do not leave the clippings on the ground, as they can easily take root and create a new plant. Dispose of plants by sending away in your yard debris pickup service, where it will be ground up and composted.
Or burn the branches. Whatever you do, don't dump the clippings along a roide or along a creek or river, as these are preferred habitats for escaped butterfly bush. Watch your property for new seedlings. Dig up and get rid of any volunteer bushes.
Don't give them away to friends. Buddleia or Buddleja are both considered correct spellings of the Latin name of the genus of the butterfly bush, according to the gardeners' encyclopedia of ornamental plants called Flora: A Gardeners Encyclopedia, published by Timber Press.
The genus has about species in the wild. Most grown in our region are native to Asia. Others originate from South Africa. And some are from South America. Only a few species in the genus are domesticated and garden-grown in our region. Outlines five basic pruning stages deed to restore a neglected apple tree to health. Includes illustrations, a glossary of terms, and sources for additional information. Includes growing information, suggested plant combinations, and color photos of dozens of western Oregon native plants. Full version available online.
The new edition describes more than trees, each illustrated with several color photos. Kym Pokorny Mar 26, News story. Deed for both commercial and home growers. Explains how to determine whether the soil is appropriate for planting walnut trees.
Covers different types of walnuts, including Franquette, Spurgeon, Hartley, Manregian, Carpathian, and When producing cherries on productive rootstocks, orchardists must focus on reducing crop load and increasing vigor.
This publication discusses how to use thinning cuts, stub cuts, and heading cuts to achieve these objectives. Includes step-by-step illustrated instructions. Cherry growers have many options when it comes to choosing rootstocks. The combination of new dwarfing rootstocks with high-density training systems le to earlier production. But growers need to consider soil fertility, scion Describes characteristics of 'Sacajawea', a new hazelnut cultivar released by Oregon State University.
Describes characteristics of 'Santiam', a new hazelnut cultivar from Oregon State University that is resistant to eastern filbert blight. When choosing a tree, first do some research. Walk around neighborhoods, parks and public gardens to get ideas.
Kym Pokorny Aug 27, News story. This class will focus on the identification, biology, and management of pest and non-pest insects found on trees in Oregon. Insects covered will include bark beetles as well as wood boring, defoliating, and sapsucking insects. So you have captured a 'creature' in a jar, or your field is full of tiny bugs, now what?
Accurate identification of insects is a key first step. Use the resources below to help. If you have a sample and would like Jessica Green Aug Article. Information about garden planning, maintenance, cleanup, pest management, houseplants and indoor gardening for the month of November. The information allows the Bureau of Land Management to correlate sagebrush steppe vegetation data and insect populations to better assess the condition of sage-grouse habitat. Fara Brummer Mar Impact story. Dan Stark Mar Impact story. Neil Bell Sep Impact story.
Research is incorporated into the Harney County Cooperative Weed Management Area, which will restore 20, acres that have been invaded by medusahead in western Harney County. Dustin Johnson Aug Impact story. We have experts in family and health, community development, food and agriculture, coastal issues, forestry, programs for young people, and gardening. Altland would like to conduct similar studies in Oregon. Want to learn more about this topic? Was this helpful? Yes No. Pruning to Restore an Old, Neglected Apple Tree Outlines five basic pruning stages deed to restore a neglected apple tree to health.
Gardening with Oregon Native Plants West of the Cascades Includes growing information, suggested plant combinations, and color photos of dozens of western Oregon native plants.Story your wife spread wide trimmed bush
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