James Sellmer, a Penn State University horticulture professor, said some recent research done to help assist PennDOT showed promise for a herbicide that killed invasive plants, but spared milkweed.
Sellmer also pointed to research showing that milkweed could be available for monarch butterflies if the mowing was done on a very specific schedule.
MORE:
http://lancasteronline.com/insider/lancaster-watchdog-merits-of-fire-house-sirens-considered-update-provided/article_f290d6da-8f7a-11e7-a9c4-b794f0c0ee06.html
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