(BCN) – The egg mass of an insect capable of sickening wine grapes was discovered for the second time this spring in Napa, according to the Napa County Agricultural Commissioner’s Office.

A local winery received around 100 large trees on March 29 from a Riverside County nursery, and during inspection the Commissioners office said staff found one viable Glassy-Winged Sharpshooter egg mass that appeared very fresh, along with over 50 older, nonviable egg masses.

The commissioner’s office said a notice of rejection was issued to the nursery for failing to provide advance notice or transporting a live pest at least 24 hours before arrival as required by state law and regulation.

As a result of the incident the commissioner’s office said they are investigating the matter and may pursue enforcement action against the origin nursery for quarantined violations.

“The second find of a viable egg mass this year is of great concern and demonstrates the ongoing need and importance of our Glassy-Winged Sharpshooter exclusion program.” Agricultural Commissioner Greg Clark said in a statement.