Pennsylvania begins phasing out sales of Bradford pear tree
Courtesy of Mason Heberling
Courtesy of Mason Heberling
Leaves from a young Bradford pear tree planted at the carriage entrance to the Carnegie Museum of Natural History were cut and documented by the museum无毛视频檚 herbarium department.
Each spring, Bradford pear trees add a pop of color to the Carnegie Museum of Natural History无毛视频檚 entrance. Planting of the Callery pear tree was banned inside Pittsburgh无毛视频檚 city limits in 2015. (Photo courtesy of Mason Heberling)
Courtey of James H. Miller
Courtey of James H. Miller
Courtey of James H. Miller
Callery pear trees are known for their pretty white blooms.
Courtesy of David J. Moorhead
Courtesy of David J. Moorhead
Courtesy of David J. Moorhead
Callery pear trees spread like weeds, especially in bright fields, across the commonwealth. Planting of the trees is being phased out because Callery pears choke out native species.
Katherine Mansfield
Katherine Mansfield
Katherine Mansfield Bradford pear trees line the streets of downtown Washington. The tree was recently added to Pennsylvania无毛视频檚 Controlled Plants and Noxious Weeds List and will be phased out over the next two years.
Courtesy of Dr. Ben Dolan
Courtesy of Dr. Ben Dolan
Callery pear trees are often part of public landscaping and, despite a pungent odor when they bloom, are admired for their bright white flowers. These Callery pears line a quiet street in Findlay, Ohio.
The Pennsylvania Department of Agriculture recently announced the addition of Callery pear to its Controlled and Noxious Weed List, along with a plan to phase out the sale and planting of America无毛视频檚 darling by 2024.
无毛视频淚t无毛视频檚 popular as a street tree. A lot of people line their driveways with them; they are in a lot of public places,无毛视频� said Scott Weaver, fourth-generation owner of Iannetti无毛视频檚 Garden Center in Burgettstown. 无毛视频淚t is a very popular tree. It is a very attractive tree. People really like them.无毛视频�
The public has adored Callery pear trees (also called the Bradford pear tree in Pennsylvania) since the species无毛视频� introduction to the United States more than a century ago.
During the early 1960s, the National Arbor Day Foundation无毛视频檚 celebrations included the distribution of the tree nationwide, and as part of Lady Bird Johnson无毛视频檚 beautification program, she promoted the Callery pear tree.
Callery pear was lauded in the New York Times for its supposed immunity to fire blight, a contagious plant disease. It was easy to grow and its flowers 无毛视频� Dr. Jason Kilgore, associate professor of biology at Washington & Jefferson College, describes them as 无毛视频渟howy, white, prolific flowers无毛视频� 无毛视频� were unmatched in beauty.
The Callery pear无毛视频檚 roots were grafted onto other fruit trees to help them grow; the tree was cloned, and varieties of Callery pear lined the streets of grand cities, including Pittsburgh.
The Callery pear was everywhere.
无毛视频淓veryone thought it was great,无毛视频� said Mason Heberling, assistant curator of botany at the Carnegie Museum of Natural History. 无毛视频淚t无毛视频檚 actually quite common. You don无毛视频檛 have to go very far to find it. I无毛视频檝e seen a lot in old fields, abandoned fields 无毛视频� or cut-down forest along the highway. Callery pear is definitely a concern.无毛视频�
The Callery pear has been on scientists无毛视频� radars for the past couple of decades.
无毛视频淢ost invasive species take time to become invasive,无毛视频� said Kilgore, who also founded and curates W&J无毛视频檚 campus arboretum. 无毛视频淐allery pear escaped from cultivation where we intended to plant it in the mid-60s, in Maryland. We无毛视频檝e known since the 无毛视频�60s that the plant can escape, but the plant didn无毛视频檛 become noticed as an invasive plant until the early 无毛视频�80s. Since then, the plant无毛视频檚 population exploded across eastern North America.无毛视频�
And in the last 10 years, said Shannon Powers, press secretary of the DOA, Pennsylvania has taken note of the species无毛视频� spread.
无毛视频淛ust over the last decade, it无毛视频檚 become more and more readily apparent it无毛视频檚 naturalizing, it无毛视频檚 spreading,无毛视频� she said. 无毛视频淚t无毛视频檚 a lovely tree. It无毛视频檚 beautiful when it blooms, but it smells horrible. For some people, it无毛视频檚 an allergen. That in itself is not reason to ban a sale of a tree. The reason to ban the sale of a tree is when it无毛视频檚 a danger to our environment, our ecology and human health.无毛视频�
The Callery pear tree and its derivatives, including the Bradford, have begun impacting the growth of native species.
无毛视频淚t spreads without human intervention,无毛视频� said Heberling. 无毛视频淚t无毛视频檚 not from our area, so it无毛视频檚 competing with our native vegetation and impacting the natural ecological cycle. Other things won无毛视频檛 grow under the Callery pear; that无毛视频檚 why it无毛视频檚 problematic.无毛视频�
Another issue with the Callery pear: it supports non-native species, including the European starling, an invasive bird that works with the Callery pear tree, said Kilgore, whose research includes northeastern North American forests. The two species support each other in their spread across the northern part of the continent.
Adding a species to Pennsylvania无毛视频檚 Controlled Plant and Noxious Weed list is a big deal. Before fall of 2021, just 39 species had made the list, which has been around since 1862.
无毛视频淚t无毛视频檚 a legal procedure,无毛视频� said Powers. 无毛视频淭here无毛视频檚 a deliberation that happens over a period of time. It无毛视频檚 not just a decision that无毛视频檚 made and boom, it无毛视频檚 banned. It无毛视频檚 tied to regulations.无毛视频�
Before it winds up on the list, a plant is voted on and must be approved by the Controlled Plant and Noxious Weed Committee. The species is published to the state无毛视频檚 bulletin and, 60 days after publication, it is formally added to the noxious weeds list.
The Callery pear was added in November.
无毛视频淚t无毛视频檚 very unusual to ban a plant that无毛视频檚 popularly available in nurseries,无毛视频� said Powers.
Powers said even more unusual is that the Callery pear tree is not the only species recently added to the noxious weed list.
无毛视频淎 couple months ago, we banned Japanese barberry. It无毛视频檚 a shrub; it无毛视频檚 very pretty, it无毛视频檚 prolific. But it is thorny, so it无毛视频檚 resistant to deer. It spreads, it harbors ticks, it takes over the understory in the forest,无毛视频� she said. 无毛视频淚t destroys habitat.无毛视频�
Because both the Bradford pear and Japanese barberry are sold commercially, the state will phase out the two species over the next couple of years 无毛视频渢o allow nurseries and landscapers to replace their stock,无毛视频� Powers said.
The sale ban of Bradford pear trees goes into effect Feb. 9.
In February 2023, the DOA will issue a letter of warning to anyone still selling the Bradford pear tree. The following February, anyone with Callery pear trees remaining in their inventory will be mailed a destruction order.
无毛视频淭hat无毛视频檚 a big deal,无毛视频� said Heberling. 无毛视频淚t just brings a bit of awareness. That state botanists and state legislatures are saying that this plant is a troubling plant and therefore would encourage people to remove any Callery pears they have 无毛视频� this does make it more in the public consciousness.无毛视频�
The state already announced exemptions to seedless varieties of Callery pear will be granted, after research confirms those varieties are sterile and won无毛视频檛 pose harm to the environment.
But Heberling and Kilgore agree the best thing for the environment is planting more native species.
无毛视频淚 always encourage people to consider native alternatives: red bud, native dogwood, small trees like blackhaw, wild plum, chokecherry and hawthorn,无毛视频� said Kilgore. 无毛视频�(Those) give a lot of the similar kinds of vibrant, prolific flowers that we would see in Callery pear, that people like. Not only should they be removing, but they should be replacing with native alternatives.无毛视频�