Penn State University Extension
Pennsylvania ground zero for another invasive pest
Penn State University has confirmed that the allium leafminer (also known as the onion leafminer) was found on infested leeks and onions collected in December 2015 from Lancaster County, Pennsylvania. It’s the first confirmed allium... more »
Watch for alternaria leafspot and head rot on broccoli
Penn State University Extension has identified alternaria leafspot and head rot on the leaves and heads of fall broccoli. To see more about how to approach this late-season disease, visit here. more »