Author Affiliations +
Gaye L. Williams,1 Robert B. Trumbule2
1(GLW) Maryland Department of Agriculture (MDA), Plant Protection and Weed Management Section, 50 Harry S. Truman Parkway, Annapolis, Md. 21401. (e-mail: gaye.williams@maryland.gov)
2(RBT) 6 Forest Way, Greenbelt, Md. 20770. (e-mail: rbtrumbule@verizon.net)