. Cooperative economic insect report. Beneficial insects; Insect pests. STATUS OF THE SCREW-WORM (Cochliomyia hominivorax) IN THE SOUTHWEST During the period October 17-23 a total of 24 cases was reported in the Southwestern Eradication Area by States and counties as follows: TEXAS - Medina and Uvalde 2 each, Brewster, Presidio, Webb, Val Verde, Zapata, Kendall, El Paso, Dimmit, Zavala and Gillespie 1 each; ARIZONA - Maricopa 5, Graham 2, Yuma, Cochise and Pinal 1 each. The Republic of Mexico reported 72 cases: Tamaulipas 4, Sonora 27, Coahuila 16, Chihuahua 23 and Territorio sur de Baja Calif
. Cooperative economic insect report. Beneficial insects; Insect pests. STATUS OF THE SCREW-WORM (Cochliomyia hominivorax) IN THE SOUTHWEST During the period October 17-23 a total of 24 cases was reported in the Southwestern Eradication Area by States and counties as follows: TEXAS - Medina and Uvalde 2 each, Brewster, Presidio, Webb, Val Verde, Zapata, Kendall, El Paso, Dimmit, Zavala and Gillespie 1 each; ARIZONA - Maricopa 5, Graham 2, Yuma, Cochise and Pinal 1 each. The Republic of Mexico reported 72 cases: Tamaulipas 4, Sonora 27, Coahuila 16, Chihuahua 23 and Territorio sur de Baja California 2. Sterile screw-worm flies re- leased: Texas 18,826,250, New Mexico 3,916,000, Arizona 16,665,000, California 224,000, Mexico 69,520,000. Positive Cases Negative Cases Ratio of Positive Cases to 100 Cases Negative Cumulative Current Cumulative Current Cumulative Table 1. Comparison of specimens reported during corresponding week in 1963 and 1964 in Southwestern Eradication Area. (1965 area figures include cases reported from Arizona and/or California; 1964 figures reflect those from the 5-State area). 1963 261 5156 1964 23 151 1965 24 838 Table 2. Comparison correspondi 1964 121 3286 1965 92 4561 256 5978 148 5095 85 4162 Comparison of specimens reported during corresponding week and in a corresponding area in 1964 in the United States-Mexico Barrier Zone.* 26 34 1665 1915 Feasibility Survey - During this period 259 cases were identified in Mexico south of the Barrier Zone, as follows: San Luis Potosi 26, Michoacan 6, Chiapas 12, Oaxaca 4, Veracruz 71, Jalisco 29, Durango53, Queretaro 1, Tabasco 1, Colima 2, Morelos 8, Nayarit 9, Puebla 7, Guerrero 8, Mexico 1, Yucatan 1, Hidalgo 9, Sinaloa 10, Guanajuato 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- tions in the United States. (Anim. Healt
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