The spotted lanternfly (Lycorma delicatula), a native to China, India, and Vietnam, has been discovered in NJ. This easily recognizable bug is a major threat to fruit and hardwood trees including willows, maples, poplars, tulip poplars, birch and ash. It feeds on leaves and bark. Mercer County is currently under quarantine and Department of Agriculture officials are asking residents to email pictures of spotted lanternflies to SLFemail@example.com or call the New Jersey Spotted Lanternfly Hotline at 1-833-223-2840.
The recent discovery of Japanese knotweed (Fallopia japonica) around the parking lot of Marquand Park demands some attention. The perennial has a bamboo-like reddish stem, heart-shaped bright green leaves, and when blooming pretty little white-flower tassels. Introduced in Europe at the beginning of the 19th century, Japanese knotweed became popular as a garden plant because of its soft and pleasing effect. In the United States, Frederic Law Olmsted was responsible for planting it in Central Park.
Over time, the plant has become the most pernicious weed in Great Britain posing a threat to building structures and road surfaces. In the United States, Japanese knotweed is considered an invasive in 38 states and occurs on the New Jersey Invasive Plant Species List. The weed likes to grow along roads and in areas disturbed by human activity. It spreads like wildfire. Eradicating a cluster of plants is not easy. A home improvement website called the Spruce describes techniques such as using tarp to smother the weed; cutting and digging up the plant and its root system; and spraying and injecting knotweed with herbicides. In the United Kingdom, scientists are experimenting with the release of a plant eating insect called Aphalara itadori that feeds on the Japanese knotweed and kills the plant.
As a service to the Princeton community, the Marquand Park Foundation would like to share information on the location of Ash trees in the public right away in Princeton.
The following link Ash trees in Princeton will provide the public with an interactive map of the location of all municipal Ash trees. The icons in the right top corner gives access the legend and the map layers. Information is based on the municipal inventory of street trees in Princeton. The location of Ash trees in public parks or on private property is NOT included.
We also created a link to the Ash trees in Marquand Park, Ash Trees in Marquand Park. Some trees have been treated last year to protect the trees from the EAB
For more information on the inventory and the pending infestation of the Emerald Ash Borer, please consult the Princeton Shade Tree website: Princeton Shade Tree Commission