. Cooperative economic insect report. Insect pests Control United States Periodicals. - 1197 - STATUS OF THE SCREW-WORM (Cochliomyia homlnivorax) IN THE SOUTHWEST During the period October 18 - 24, TEXAS reported 22 screw-worm cases from 20 counties: Milam (1), Pecos (1), Kinney (1), Uvalde (1), Dimmit (2), Zapata (1), Starr (2), Hidalgo (2), Medina (1), Bexar (1), Bandera (1), Schleicher (1), McCulloch (1), Kendall (1), Comal (1), Hays (1), Gonzales (1) De Witt (1) and Limestone (1). NEW MEXICO reported 1 case in Grant County. ARIZONA reported 11 cases from 4 counties: Cochise (6), Pinal (3),
. Cooperative economic insect report. Insect pests Control United States Periodicals. - 1197 - STATUS OF THE SCREW-WORM (Cochliomyia homlnivorax) IN THE SOUTHWEST During the period October 18 - 24, TEXAS reported 22 screw-worm cases from 20 counties: Milam (1), Pecos (1), Kinney (1), Uvalde (1), Dimmit (2), Zapata (1), Starr (2), Hidalgo (2), Medina (1), Bexar (1), Bandera (1), Schleicher (1), McCulloch (1), Kendall (1), Comal (1), Hays (1), Gonzales (1) De Witt (1) and Limestone (1). NEW MEXICO reported 1 case in Grant County. ARIZONA reported 11 cases from 4 counties: Cochise (6), Pinal (3), Maricopa (1) and Yuma (1). Republic of Mexico reported 117 cases: Chihuahua (52), Tamaulipas (3), Coahuila (3), Durango (10), Nuevo Leon (4), San Luis Potosi (2) and Sonora (43). Sterile screw-worm flies released: Texas 20,508,250, New Mexico 2,500,000, Arizona 6,122,000 and Mexico 51,706,000. 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 2,424 46,012 90 2,663 1963 261 5,156 256 5,978 1964 24 153 148 5,095 Table 2. Comparison of specimens reported during corresponding weeks and in a corresponding area in 1963 in the United States-Mexico Barrier Zone.* 1963 282 4,804 30 1,205 1964 121 3,286 26 1,665 Table 2A. Mexican portion of Barrier Zone only. 1963 95 1,486 0 155 1964 105 3,100 4 749 * 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 ^ period Oct. 18 - Oct. 2k â Limits of Barrier Zone â â â â â â ami Linear drop along river valleys. Please note that the
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