A final rule on areas under quarantine for plum pox virus removes areas in Pennsylvania from the list and adds parts of New York, according to a notice published May 11 in the Federal Register.

The Animal and Plant Health Inspection Service of the U.S. Department of Agriculture issued an interim rule in December that was the same as the final version, with the exception of the changes for Pennsylvania and New York. The agency sought public comments through Feb. 25 this year, but no comments were filed.

The final rule removes portions of Adams County, Pa., from the quarantine list and adds portions of Niagara, Orleans and Wayne counties in New York. The final rule is effective immediately. Detailed descriptions of the changes are in the May 11 notice in the Federal Register.

According to the notice, plum pox virus can infect plums, peaches, apricots, almonds, nectarines and cherries. The virus can eventually cause severely reduced yields and fruit that is produced is often misshapen and blemished.

The virus is spread by several species of aphids. It can also be spread by grafting and by the movement of infected bud wood, nursery stock and other plant parts. Transmission also can occur via farm tools and machinery.