. Cooperative economic insect report. Beneficial insects; Insect pests. - 397 - STATUS OF THE SCREW-WORM (Cochliomyia homlnivorax) IN THE SOUTHWEST During the period April 24-30, a total of 10 cases was reported in the Southwestern Eradication Area by States and counties as follaws: TEXAS - Cameron 1; ARIZONA - Yuma 2, Maricopa 2, Cochise 2, Pinal 1, Pima 1; CALIFORNIA - Imperial 1. The Republic of Mexico reported 64 cases: Sonora 52, Chihuahua 5, Coahuila 1, Tamaul- ipas 4, Nuevo Leon 2. Sterile screw-worm flies released: Texas 17,538,250, Arizona 24,456,000, New Mexico 5,600,000, California
. Cooperative economic insect report. Beneficial insects; Insect pests. - 397 - STATUS OF THE SCREW-WORM (Cochliomyia homlnivorax) IN THE SOUTHWEST During the period April 24-30, a total of 10 cases was reported in the Southwestern Eradication Area by States and counties as follaws: TEXAS - Cameron 1; ARIZONA - Yuma 2, Maricopa 2, Cochise 2, Pinal 1, Pima 1; CALIFORNIA - Imperial 1. The Republic of Mexico reported 64 cases: Sonora 52, Chihuahua 5, Coahuila 1, Tamaul- ipas 4, Nuevo Leon 2. Sterile screw-worm flies released: Texas 17,538,250, Arizona 24,456,000, New Mexico 5,600,000, California 400,000 and Mexico 83,216,000. Note: The report for April 10-16 (CEIR 16(16):344) included one case in Grant County, New Mexico. Further investigation showed the specimen was old and it is believed to have beeen collected in 1965, Consequently this case is deleted from the 1966 records. Positive Cases Negative Cases Ratio of Positive Cases to 100 Cases Negative Year Current Cumulative Current Cumulative Current Cumulative Table 1. Comparison of specimens reported during corresponding week in 1964 and 1965 in Southwestern Eradication Area. (1966 area figures include cases reported from Arizona and/or California; 1965 figures reflect those from the 5-State area), 1964 7 1965 3 1966 10 37 401 23 228 67 142 2272 1498 887 Table 2. Comparison of specimens reported during corresponding week and in a corresponding area in 1965 in the United States-Mexico Barrier Zone.* 1965 1966 101 74 903 817 64 60 607 541 Mexico Field Study - During this period 203 cases were identified in Mexico south of the Barrier Zone as follows: Guanajuato 5, Campeche 12, Yucatan 17, Sinaloa 48, San Luis Potosi 8, Nayarit 17, Colima 3, Zacatecas 20, Mexico 4, Queretaro 3, Morelos 2, Durango 2, Chiapas 3, Jalisco 22, Tabasco 15, Hidalgo 1, Oaxaca 4, Veracruz 6, Guerrero 6, Territorio de Quintana Roo 1, Michoacan 4. * Barrier Zone - Area in which screw-worm
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