. Bulletin of the Department of Agriculture. Agriculture. E BULLETIN No. 965 Contribution from the Bureau of Entomology L. O. HOWARD, Chief. Washington, D. C. October 18, 1921 CONTROL OF THE ARGENTINE ANT IN CALIFORNIA CITRUS ORCHARDS. By R. S. WoGLUM, Entomologist, and A. D. Borden, Scientijic Assistant, Fruit Insect Investigations.^ Introduction Relation of the ant to the citrus industry. Other relations Distribution Characteristics and habits Control Banding Trap nesting Poisoned sirups Page. 1 2 Page. Control—Continued. Factors influencing control 34 Control on marginal trees Clean cu
. Bulletin of the Department of Agriculture. Agriculture. E BULLETIN No. 965 Contribution from the Bureau of Entomology L. O. HOWARD, Chief. Washington, D. C. October 18, 1921 CONTROL OF THE ARGENTINE ANT IN CALIFORNIA CITRUS ORCHARDS. By R. S. WoGLUM, Entomologist, and A. D. Borden, Scientijic Assistant, Fruit Insect Investigations.^ Introduction Relation of the ant to the citrus industry. Other relations Distribution Characteristics and habits Control Banding Trap nesting Poisoned sirups Page. 1 2 Page. Control—Continued. Factors influencing control 34 Control on marginal trees Clean culture Control on house lots or about build- ings Comprehensive demonstration of con- trol arv INTRODUCTION. Supposedly introduced into the United States at the close of the nineteenth century the Argentine ant {Iridomyrmex humilis Mayr) has since become widely distributed through the more temperate regions, where its complete occupancy, in long-infested localities, and its omnivorous habit bear an important relation to crop pro- duction and food storage and rank it as one of the most annoying of household pests. Its discovery in 1908 in cities bordering San Fran- cisco Bay resulted in the initiation of a control campaign under the direction of Prof. C. W. Woodworth, of the University of California, and subsequently led to the development of an arsenical poisoned sirup of considerable merit. The Argentine ant was recorded in citrus orchards in California almost from the date of its reported presence in the State. It appeared to cause no alarm to orchardists, however, usually remained unnoticed except about the buildings, and where observed was classed 1 Photographs by senior writer; figure 3 drawn by Miss A. Hotter. Mr. Woglum resigned from the Bureau of Entomology September 11,1920. 48155°—21-Bull. 965 1. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrati
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