. Bulletin of the Department of Agriculture. Agriculture; Agriculture. BULLETIN 902, U. S. DEPARTMENT OF AGRICULTURE. It is widely distributed in the Rocky Mountain region of Colorado and New Mexico, and is known to occur in more isolated localities in Arizona, Wyoming, Nebraska, Oklahoma, and Kansas. It is also abundant in some portions of Texas, ranging southward to Browns- ville and undoubtedly into Mexico, although only doubtfully recorded from that country. The known distribution is shown in the map (fig. 3). This species is to be found quite frequently at very high elevations and is
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. BULLETIN 902, U. S. DEPARTMENT OF AGRICULTURE. It is widely distributed in the Rocky Mountain region of Colorado and New Mexico, and is known to occur in more isolated localities in Arizona, Wyoming, Nebraska, Oklahoma, and Kansas. It is also abundant in some portions of Texas, ranging southward to Browns- ville and undoubtedly into Mexico, although only doubtfully recorded from that country. The known distribution is shown in the map (fig. 3). This species is to be found quite frequently at very high elevations and is also evidently a permanent inhabitant of lower areas,.as, for example, Brownsville, Tex. It is evidently a Sonoran form and common to both the Upper and Lower Sonoran Life Zones,4 but in some States it has been observed in the Semitropical, Transi- tion, and Boreal Zones. Undoubtedly the species has a wider distribution than is indicated by the map, comprising an area considerably larger in extent than one-third of the United States. It probably occurs in southern Idaho, and without doubt is more widely distributed in the States of Nebraska, Wyoming, Montana, Utah, Arizona, and Texas than is at pres- ent known. While it does not approach the border lines of several other States known to be inhab- ited, nevertheless a lookout should be kept in the future for invasions in southwestern Louisiana, southeastern Idaho, and Nevada. REPORTS OF INJURY. Our record of injury positively attributable to the western cabbage flea-beetle begins in 1889, the year when the species was described as new to science. That year, May 25, Prof. T. D. A. Cockerell sent specimens to the Department of Agriculture with the report that the insect did great damage to the leaves of turnip at West- cliff e, Colo. Injuries were reported at intervals in 1893, 1897, 1904, and 1906. In 1908 and 1909 there were several outbreaks over con- siderable territory, and a somewhat smaller outbreak occurred also over a la
Size: 1997px × 1252px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1900, bookdecade1910, booksubjectagriculture
