. Cooperative economic insect report. Insect pests Control United States Periodicals. - 1245 - STATUS OF THE SCREW-WORM (Cochliomyia hominivorax) IN THE SOUTHWEST During the period November 7-14, TEXAS reported 13 screw-worm cases: 3 in Webb County, 2 each in Starr, Maverick and Nueces Counties, and 1 each in Dimmit, Jeff Davis, Medina and Live Oak Counties. ARIZONA reported 6 cases: 3 in Pima County, 2 in Santa Cruz County and 1 in Yuma County. The Republic of Mexico reported 125 cases: Sonora 58, Chihuahua 34, Veracruz 1, Durango 6, San Luis Potosi 2, Coahuila 9, Tamaulipas 6 and Nuevo Leon
. Cooperative economic insect report. Insect pests Control United States Periodicals. - 1245 - STATUS OF THE SCREW-WORM (Cochliomyia hominivorax) IN THE SOUTHWEST During the period November 7-14, TEXAS reported 13 screw-worm cases: 3 in Webb County, 2 each in Starr, Maverick and Nueces Counties, and 1 each in Dimmit, Jeff Davis, Medina and Live Oak Counties. ARIZONA reported 6 cases: 3 in Pima County, 2 in Santa Cruz County and 1 in Yuma County. The Republic of Mexico reported 125 cases: Sonora 58, Chihuahua 34, Veracruz 1, Durango 6, San Luis Potosi 2, Coahuila 9, Tamaulipas 6 and Nuevo Leon 9. Sterile screw-worm flies released: Texas 19,499,950, New Mexico 2,760,000, Arizona 6,540,000 and Mexico 50,791,600. Ratio of Positive Cases Positive Cases Negative Cases to 100 Cases Negative Year Current Cumulative Current Cumulative Current Cumulative Table 1. Comparison of specimens reported during corresponding weeks in 1962 and 1963 in Southwestern Eradication Area. 1962 690 49,109 57 2,916 1, 1, 1963 219 6,105 273 6,774 1964 13 211 219 5,780 Table 2. Comparison of specimens reported during corresponding weeks and in a corresponding area in 1963 in the United States-Mexico Barrier Zone.* 1963 197 5,587 34 1,313 1964 130 3,850 55 1,883 Table 2A. Mexican portion of Barrier Zone only. 1963 128 1,844 32 193 400 1964 116 3,622 20 792 580 * Barrier Zone - Area in which screw-worm eradication operations are being carried out in an effort to prevent establishment of self-sustaining screw-worm popula- tion in the United States. (Anim. Dis. Erad. Div.).. Figures - Number of cases reported -« in infested counties for ^â period November 7-14 â â â -âLimits of Barrier Zone â¢" 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
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