Official Pest Reports

Official Pest Reports are provided by National Plant Protection Organizations within the NAPPO region. These Pest Reports are intended to comply with the International Plant Protection Convention's Standard on Pest Reporting, endorsed by the Interim Commission on Phytosanitary Measures in March 2002.

USA Flag Cucumber Green Mottle Mosaic Virus (CGMMV) in California
Date posted: 12/06/2013
Contact: Deborah McPartlan, National Policy Manager, at 301-851-2191 or Robert Bailey, National Operations Manager, at 970-494-7569
On July 24, 2013, PPQ confirmed the first U.S. detection of Cucumber Green Mottle Mosaic Virus (CGMMV) in a sample taken from a melon seed field in Yolo County, California. The virus, which occurs in certain areas of Europe and Asia, is a tobamovirus that affects cucumber and melon.

PPQ is working closely with its State and County cooperators to determine the size and scope of the infestation and the appropriate next steps. Since the initial find, a 4 acre plot in Sutter County has also tested positive for CGMMV. The California Department of Food and Agriculture (CDFA) and County officials have placed a hold on all of the confirmed fields and are working to identify equipment used in these fields. PPQ’s Technical Working Group (TWG) has developed protocols for mitigation of risk from this virus, including sanitation protocols, and provides guidance for future farming operation in the infected areas

CGMMV affects cucumber and different types of melons and is seed-borne; spread of the disease is primarily through infected seed and mechanical means. Available literature reports yield losses of about 15 percent in cucurbitaceous crops.

Under IPPC Standards, Cucumber Green Mottle Mosaic Virus (CGMMV) is considered to be a pest that is transient, actionable, and under eradication in the United States.