. Circular. Insects. CIRCULAR NO. 68. United States Department of Agriculture, BUREAU OF ENTOMOLOGY, L. O. HOWARD. Entomologist. HE TOBACCO THRIPS AND REMEDIES TO PREVENT "WHITE VEINS" IN WRAPPER TOBACCO. (Euthrips nicotianre Hinds.)1 By W. A. Hooker, Special Field Agent. In the tobacco thrips, an insect until recently unknown to science, e have a pest that has become of great economic importance. It is losely related to the minute yel- wish wheat thrips (Uuthrips itici Fitch) that is common /erywhere in blossoms of all mds. It may be distinguished, jwever, by its brown color, he com
. Circular. Insects. CIRCULAR NO. 68. United States Department of Agriculture, BUREAU OF ENTOMOLOGY, L. O. HOWARD. Entomologist. HE TOBACCO THRIPS AND REMEDIES TO PREVENT "WHITE VEINS" IN WRAPPER TOBACCO. (Euthrips nicotianre Hinds.)1 By W. A. Hooker, Special Field Agent. In the tobacco thrips, an insect until recently unknown to science, e have a pest that has become of great economic importance. It is losely related to the minute yel- wish wheat thrips (Uuthrips itici Fitch) that is common /erywhere in blossoms of all mds. It may be distinguished, jwever, by its brown color, he common onion thrips Thrips tabaci) of this country as originally described by indeman as attacking tobacco : Russia, but since it has never ien found to do so in the United • iates, this new pest may be firmed "the tobacco ; This insect injures shade- (j$own cigar-wrapper tobacco in ^Ttarida, southern Georgia, and 1 sxas, and thus appears to be widely distributed through the kith. Its occurrence in Texas is discovered the past sum- er. The adult thrips in feed- er on the upper surface of the aves, as is their custom, re- ove the sap from the lateral ins and veinlets, which when mented and ready for the ide become of a much lighter color than the other parts of the leaf. lese light veins (fig. 1) are objectionable, since they appear in the uiufactured cigars. As a result, tobacco thus affected is reduced in. Fig. 1.—Leaf of tobacco, showing " white veins caused by Euthrips nicotiance (original). Described in the Proceedings of the Biological Society of Washington, Vol. fill, pp. 197-200, September, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Entomology. Washington, Govt. print. off.
Size: 1178px × 2121px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectinsects
