. Cooperative economic insect report. Beneficial insects; Insect pests. - 853 - STATUS OF THE SCREW-WORM (Cochliomyia hominivorax) IN THE SOUTHWEST During the period July 12-18, one screw-worm infestation was confirmed in Crockett County, TEXAS; this county is outside fly-release area. One case was reported from Grant County, NEW MEXICO. ARIZONA reported 3 cases - Pima County (1), Santa Cruz County (2). The Republic of Mexico reported 104 cases from the States of Sonora (26), Durango (19), Choahuila (2), Chihuahua (39), Nuevo Leon (10), Tamaulipas (6), and San Luis Potosi (2). A total of 95,47
. Cooperative economic insect report. Beneficial insects; Insect pests. - 853 - STATUS OF THE SCREW-WORM (Cochliomyia hominivorax) IN THE SOUTHWEST During the period July 12-18, one screw-worm infestation was confirmed in Crockett County, TEXAS; this county is outside fly-release area. One case was reported from Grant County, NEW MEXICO. ARIZONA reported 3 cases - Pima County (1), Santa Cruz County (2). The Republic of Mexico reported 104 cases from the States of Sonora (26), Durango (19), Choahuila (2), Chihuahua (39), Nuevo Leon (10), Tamaulipas (6), and San Luis Potosi (2). A total of 95,476,650 sterile screw-worm flies was released: 25,274,250 in Texas; 1,800,000 in New Mexico; 3,392,000 in Arizona; and 65,010,400 in Mexico. The following is a comparison of specimens reported during corresponding weeks in 1962 and 1963. Positive Cases Negative Cases* Year Current Cumulative Current Cumulative Ratio of Cases Positive to Negative** Current Cumulative 1962 1,994 25,050 43 2,018 4,:100 1,:100 1963 124 2,139 110 4,270 :100 :100 1964 2 97 49 3,985 :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 to 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 July 12-18 ^â ^â ^ 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. Animal and Plant Health Service. Plant Protection and Quarantine Programs; United States. Bureau of Entomology and Plant Quarantine; United States. Plant Pest Control Division. Hyattsville, MD. [etc. ] Plant Protection and Quarantine Programs Animal and Plant H
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