Submitted to: International Organization of Citrus Virologists Newsletter
Publication Type: Other
Publication Acceptance Date: May 15, 2001
Publication Date: June 15, 2001
Citation: KRUEGER, R. NATIONAL CLONAL GERMPLASM REPOSITORY FOR CITRUS AND DATES: BROWN CITRUS APHID IN YUCATAN, MEXICO. INTERNATIONAL ORGANIZATION OF CITRUS VIROLOGISTS NEWSLETTER. 2001. Technical Abstract: The Brown Citrus Aphid (BCA) was reported as entering the Yucatan Peninsula of Mexico in the Spring of 2000. A cooperative project between the USDA-ARS National Clonal Germplasm Repository for Citrus & Dates (NCGRCD), Riverside, California and the INIFAP Campo Experimental Uxmal (CEUM), Yucatan was initiated in 2000 with the goal of establishing a source of virus-free propagative material for the Yucatan nurseries. In January, 2001, Robert Krueger, Director of the NCGRCD, visited the Yucatan Peninsula hosted by Juan Jasso-Argumedo of CEUM. The penetration of the BCA was observed during this trip. There were two separated invasions of the BCA in 2000. One entrance was through the northern part of the state of Quintana Roo, near Cancun; the other through the southern part of Quintana Roo, near Chetumal. It has spread approximately 100 km westward in less than a year, and in some cases is only about 20 km from production areas in the state of Yucatan. Its spread has been primarily along roadways, and at this time it is found mainly in dooryard plantings near the highways. The BCA has apparently not been detected further than a few hundred meters from the highways. If it reaches production areas, spread will undoubtedly be faster and wider. It is expected that the onset of hot weather in April may push it back towards the east somewhat. The BCA is being tracked by Sanidad Vegetal. In addition to the penetration of the BCA, the trip allowed the observation of the beginning of the protected mother block at CEUM, and of the Yucatan citrus industry. A reciprocal visit to California will be made in March, 2001, allowing observation of the California certification program and other efforts to suppress CTV and other graft-transmissible diseases.