. Bulletin of the Department of Agriculture. Agriculture; Agriculture. BULLETIN OF THE No. 233. § Contribution from the Bureau of Entomology, L. O. Howard, Chief. May 27, 1915. RELATION OF THE ARIZONA WILD COTTON WEEVIL TO COTTON PLANTING IN THE ARID By B. R. Coad, Entomological Assistant, Southern Field Crop Insect Investigations. INTRODUCTION. With the introduction of cotton culture into Arizona under con- ditions of irrigation, it was hoped that the establishment of important insect pests could be prevented by quarantines, and this was ren- dered possible by the complete isolati
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. BULLETIN OF THE No. 233. § Contribution from the Bureau of Entomology, L. O. Howard, Chief. May 27, 1915. RELATION OF THE ARIZONA WILD COTTON WEEVIL TO COTTON PLANTING IN THE ARID By B. R. Coad, Entomological Assistant, Southern Field Crop Insect Investigations. INTRODUCTION. With the introduction of cotton culture into Arizona under con- ditions of irrigation, it was hoped that the establishment of important insect pests could be prevented by quarantines, and this was ren- dered possible by the complete isolation of the new territory. Recent investigations in Arizona, however, have revealed the presence of a weevil, Anihonomus grandis thurherise, very nearly identical with the famous Mexican cotton-boll weevil which has proved so disastrous to cotton culture in many parts of the South. This is due to the occur- rence, in many of the mountain ranges of the southeastern section of the State, of a wild cotton plant known technically as Thuroeria ihespesioides. This plant, which is so closely related to cotton that some investigators have classed it in the genus Gossypium (the genus of cotton), was found to be the host of a weevil closely related to the cotton-boll weevil, as well as the host of a number of other insects, and it was at once perceived that there was a possibility that these insects might attack cultivated cotton grown near these mountains. Of the various insects found on the wild cotton plant, the weevil is probably the mosty important, and the present bulletin deals with this species. HISTORY OF THE WEEVIL. While the history of the cotton-boll weevil is a familiar subject to almost every one in the infested territory, it is not nearly so well known in the western cotton country, and a brief review of its activi- ties in the United States will help to an understanding of the sig- nificance of its presence in Arizona. The Mexican cotton-boll weevil, Anihonomus grandis Boh
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