. Cooperative economic insect report. Insect pests Control United States Periodicals. - 1229 - STATUS OF THE SCREW-WORM (Cochliomyia hominivorax) IN THE SOUTHWEST During the period November 1-7, TEXAS reported 23 screw-worm cases; 1 each from Val Verde, Cameron, Crockett, Hidalgo, La Salle, Dimmit, Kinney, Uvalde, Donley, Kerr, Burnet, Comal, Frio, McCulloch and Schleicher Counties; 2 cases reported in Zavala and Medina Counties and 3 cases in Zapata County. The twenty-third case was not traceable to point of origin. ARIZONA reported one case each in Pima and Maricopa Counties. The Republic of
. Cooperative economic insect report. Insect pests Control United States Periodicals. - 1229 - STATUS OF THE SCREW-WORM (Cochliomyia hominivorax) IN THE SOUTHWEST During the period November 1-7, TEXAS reported 23 screw-worm cases; 1 each from Val Verde, Cameron, Crockett, Hidalgo, La Salle, Dimmit, Kinney, Uvalde, Donley, Kerr, Burnet, Comal, Frio, McCulloch and Schleicher Counties; 2 cases reported in Zavala and Medina Counties and 3 cases in Zapata County. The twenty-third case was not traceable to point of origin. ARIZONA reported one case each in Pima and Maricopa Counties. The Republic of Mexico reported 144 cases from States of Sonora 73, Chihuahua 38, Tamaulipas 10, Durango 11, Coahuila 4, Nuevo Leon 4, Zacatecas 1, San Luis Potosi 1, and Veracruz 2. Total of 17,980,000 sterile flies released over Texas, 1,160,000 over New Mexico, 7,102,000 over Arizona and 55,438,400 over Mexico. 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 932 48,419 82 2,859 1963 361 5,886 224 6,501 1964 23 188 293 5,561 Table 2. Comparison of specimens reported during corresponding weeks and in a corresponding area in 1963 in the United States-Mexico Barrier Zone.* 1963 305 5,390 31 1,279 1964 158 3,720 67 1,778 Table 2A. Mexican portion of Barrier Zone only. 1963 165 1,716 6 161 2, 1, 1964 144 3,506 10 772 1, * 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 eases reported in Infested counties for period November 1-7 - â â â â Limits of Barrier Zone iiiimimi Linear drop along river valleys. Please note that the
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