The first step to controlling weeds is proper identification. There are many resources available to help with identification.
Virginia Weed Identification Clinic: Farmers and homeowners can also submit samples to the through their county extension agent.
Find your agent: https://ext.vt.edu/offices.html
For agents: Virginia Weed ID Clinic
Other online identification tools include:
The University of Tennessee has a fee-based identification service that offers both traditional identification by botanical characteristics and molecular weed identification.