. Bulletin of the Department of Agriculture. Agriculture; Agriculture. BULLETIN OF THE mmofAffldM No. 59 ontribution from the Bureau of Entomology, L. O. Howard, Chief. January 19, 1914. (PROFESSIONAL PAPER.) THE TOBACCO SPLITWORM. By A. C. Morgan and S. E. Crumb, Of Southern Field Crop Insect Investigations, INTRODUCTION. The following account of the tobacco splitworm (PJithorimaea operculella Zeller), although not complete, contains data not hereto- fore published. The life history notes, description of stages, etc., were made by the junior writer. Credit is due the senior writer for th
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. BULLETIN OF THE mmofAffldM No. 59 ontribution from the Bureau of Entomology, L. O. Howard, Chief. January 19, 1914. (PROFESSIONAL PAPER.) THE TOBACCO SPLITWORM. By A. C. Morgan and S. E. Crumb, Of Southern Field Crop Insect Investigations, INTRODUCTION. The following account of the tobacco splitworm (PJithorimaea operculella Zeller), although not complete, contains data not hereto- fore published. The life history notes, description of stages, etc., were made by the junior writer. Credit is due the senior writer for the observations made in Florida and for the recommendations under the heading: "Remedial ; In California this insect is a serious potato pest, and Dr. F. H. Chittenden ^ reports that in 1912 two growers at El Monte, Cal., lost $90,000 and $70,000, respectively, on the crop of that year. Although quite generally distributed over the Southern States, this insect has caused serious loss to tobacco growers in only one locahty, viz., Dade City, Fla. The injury at that place was severe in 1906^ more severe in 1907, and culminated in 1908 in a conservatively estmiated loss of $150 per acre—a loss totaling $12,000 for the 80 acres of shade-grown tobacco. The injury since 1908 has been very light, due in part to the early planting and in part to the very careful and very thorough remedial measures employed. The variation in food habits, which is noted later, had created the suspicion that the form working upon potatoes might be specifically distinct from the one attacking tobacco. During the summer of 1913 experiments were conducted to determine this point. EXPERIMENTS ON THE SPECIFIC STATUS OF THE TWO FORMS. The potato-tuber moths used in these experiments were of the habitual potato-feeding type from Whittier, Cal., kindly furnished by Mr. J. E. Graf. The splitworm moths were of the habitual tobacco-feeding type from Florida, North Carolina, and Virginia. 1 Chitten
Size: 1308px × 1911px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1900, bookdecade1910, booksubjectagriculture
