. Bulletin of the Department of Agriculture. Agriculture; Agriculture. BULLETIN OF THE Ml No. 263. Contribution from Bureau of Entomology, L. 0. Howard, Chief. July 19, 1915. (PROFESSIONAL PAPER.) THE CRANBERRY ROOTWORM. By H. B. Scahmell, Entomological Assistant, Deciduous Fruit Insect Investigations. INTRODUCTION. 2 The investigation of cranberry insects in New Jersey has included the biological study of a beetle, well known to collectors for more than a century, but unrecorded, until recently, as a pest to the cranberry. Attention was first called to it on the cranberry bogs by Mr. T.
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. BULLETIN OF THE Ml No. 263. Contribution from Bureau of Entomology, L. 0. Howard, Chief. July 19, 1915. (PROFESSIONAL PAPER.) THE CRANBERRY ROOTWORM. By H. B. Scahmell, Entomological Assistant, Deciduous Fruit Insect Investigations. INTRODUCTION. 2 The investigation of cranberry insects in New Jersey has included the biological study of a beetle, well known to collectors for more than a century, but unrecorded, until recently, as a pest to the cranberry. Attention was first called to it on the cranberry bogs by Mr. T. B. Gaskill, of Xew Egypt, N. J., who reported injury in a bog in his vicinity and sent specimens of larvae, pupse, and beetles to the Bureau of Entomology for determination. Adult specimens, submitted to Mr. E. A. Schwarz, were determined as Rhabdopterus picipes Oliv., of the family Chrysonielidas. Mr. A. L. Quaintance (1912),3 of the Bureau of Entomology, after making a visit to the infested bog in June of 1912, presented his obser- vations on the extent and character of the injury and the feeding and probable egg-laying habits of the beetle before the Entomological Society of Washington. These notes were the first published records pertaining to the economic importance of this insect. Rhabdopterus picipes was first described by Olivier (180S) from the collection of Bosc in the Jardin des Plantes, Paris, being placed by him in the genus Colaspis. It was later described by Say (1824) under the name Colaspis pretezta. Le Conte, when he edited the writings of Say (1859), made note that Colaspis pretezta Say is ( 'olaspis picipes Oliv. The genus Rhabdopterus was erected by Lefevre in L885, and a few years later Horn (1892) transferred picipes from Colaspis to Rhabdopterus. r writers have made mention of the food plants of the beetle, bul only "ne larval host is known. With the finding of the larvae on cranberry roots and the 'lying of the vines in infested areas it was
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