. Cooperative economic insect report. Insect pests Control United States Periodicals. - 958 - STATUS OF THE SCREW-WORM (Cochliomyia hominivorax) IN THE SOUTHWEST During the period August 2-8, one screw-worm case was confirmed in Irion County, TEXAS. No infestations reported in NEW MEXICO. One case was reported in Pinal County, ARIZONA. The Republic of Mexico reported 100 cases from the States of Sonora (22) , Chihuahua (45) , Coahuila (2) , Nuevo Leon (5), Tamaulipas (11) , San Luis Potosi (3), Durango (8) and Veracruz (4). Total of 122,737,450 sterile screw-worm flies was released: 28,662,250
. Cooperative economic insect report. Insect pests Control United States Periodicals. - 958 - STATUS OF THE SCREW-WORM (Cochliomyia hominivorax) IN THE SOUTHWEST During the period August 2-8, one screw-worm case was confirmed in Irion County, TEXAS. No infestations reported in NEW MEXICO. One case was reported in Pinal County, ARIZONA. The Republic of Mexico reported 100 cases from the States of Sonora (22) , Chihuahua (45) , Coahuila (2) , Nuevo Leon (5), Tamaulipas (11) , San Luis Potosi (3), Durango (8) and Veracruz (4). Total of 122,737,450 sterile screw-worm flies was released: 28,662,250 in Texas, 1,942,000 in New Mexico, 5,862,000 in Arizona and 86,271,200 in Mexico. The following is a comparison of specimens reported during corresponding weeks in 1962 and 1963. Ratio of Cases Positive Cases Negative Cases* Positive to Negative** Year Current Cumulative Current Cumulative Current Cumulative 1962 1,366 31,082 42 2,167 3,:100 1,:100 1963 33 2,309 66 4,487 :100 :100 1964 1 107 45 4,143 :100 :100 * The number of cases not screw-worm is an index of the efficiency of the reporting system. ** A comparison of the ratios of screw-worm cases with cases that are not screw- worm is an index of the change in number of screw-worm cases. (Anim. Dis. Erad. Div.).. Figures - Number of cases reported in infested counties for ^ period August 2-8 '^/^ August 2-8 Limits of fly drop areas Linear drop along river valleys. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Entomology and Plant Quarantine; United States. Plant Pest Control Branch; United States. Plant Pest Control Division; United States. Animal and Plant Health Inspection Service. Plant Protection and Quarantine Programs. Washington, D. C. : U. S. Dept. of Agriculture, Agricultural Research Administra
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