. Cooperative economic insect report. Insect pests Control United States Periodicals. - 587 - STATUS OF THE SCREW-WORM (Cochliomyia hominivorax) IN THE SOUTHWEST During the period May 24-30, a total of 7 screw-worm cases was reported from TEXAS. First screw-worm cases of this year were reported from Lampasas (1), Mason (2), Schleicher (2) and Bexar (1). Bee County also reported one case. The Republic of Mexico reported 61 screw-worm cases from the States of Sonora (28), Coahuila (8), Nuevo Leon (8), Tamaulipas (15) and Jalisco (2). A total of 100,942,650 sterile screw-worms was released: 32,78
. Cooperative economic insect report. Insect pests Control United States Periodicals. - 587 - STATUS OF THE SCREW-WORM (Cochliomyia hominivorax) IN THE SOUTHWEST During the period May 24-30, a total of 7 screw-worm cases was reported from TEXAS. First screw-worm cases of this year were reported from Lampasas (1), Mason (2), Schleicher (2) and Bexar (1). Bee County also reported one case. The Republic of Mexico reported 61 screw-worm cases from the States of Sonora (28), Coahuila (8), Nuevo Leon (8), Tamaulipas (15) and Jalisco (2). A total of 100,942,650 sterile screw-worms was released: 32,786,250 in Texas, 1,942,000 in New Mexico, 400,000 in Arizona and 65,814,400 in Mexico. The following is a comparison of specimens reported during corresponding weeks in 1962 and 1963: Year Positive Cases Negative Cases* Ratio of Positive to Cases Negative** Current Cumulative Current Cumulative Current Cumulative 1962 1,853 9,771 105 1,507 1,764:1,000 6,483:1,000 1963 154 1,170 213 3,238 723:1,000 361:1,000 1964 7 71 168 3,229 41:1,000 22:1,000 * 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 numbers of screw-worm 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 Administration, Bureau of Entomology and Plant Quarantine
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