. Bulletin of the Department of Agriculture. Agriculture. BULLETIN No. 609 Contribution from Bureau of Entomology L. O. HOWARD, Chief Washington, D. j&y'irsu PROFESSIONAL PAPER November 22, 1917 THE SWEET-POTATO LEAF-FOLDER. By Thos. H. Jones,1 Entomological Assistant, Truck-Crop Insect Investigations. [With a complementary report regarding spraying experiments for its control, conducted in southern Texas by M. M. High.] CONTENTS. Page. Introduction 1 History, distribution, and synonymy 2 Description of stages 3 Food plants 5 Seasonal liistory and habits 5 Natural enemies The swee
. Bulletin of the Department of Agriculture. Agriculture. BULLETIN No. 609 Contribution from Bureau of Entomology L. O. HOWARD, Chief Washington, D. j&y'irsu PROFESSIONAL PAPER November 22, 1917 THE SWEET-POTATO LEAF-FOLDER. By Thos. H. Jones,1 Entomological Assistant, Truck-Crop Insect Investigations. [With a complementary report regarding spraying experiments for its control, conducted in southern Texas by M. M. High.] CONTENTS. Page. Introduction 1 History, distribution, and synonymy 2 Description of stages 3 Food plants 5 Seasonal liistory and habits 5 Natural enemies The sweet-potato leaf-folder in southern Texas Summary Literature cited INTRODUCTION. The larva of Pilocrocis tripunctata Fab. (fig. 1 c, d), a member of the lepidopterous family Pj^ralidse, was noted first as an enemy of sweet potatoes in Louisiana by the writer while cooperating with the Louisiana Experiment Stations in the fall of 1914. Since that time the species has been kept under observation at Baton Rouge, La., and has been noted also in Plaquemines and Tangipahoa Parishes. The species, which may be called the "sweet-potato leaf folder" because of the habits of the larva, has not been observed as yet in destructive numbers in Louisiana; but it has been reported by Mr. M. M. High, of the Bureau of Entomology, as very injurious to the sweet potato near Brownsville, Tex., where he conducted control ex- periments with poisons during the fall of 1916. As it is possible that this pest may become an important enemy of sweet potatoes in the Southern States, it seems advisable to publish the results concern- ing its biology and the results of Mr. High's control 1 The author wishes to acknowledge the issistance of C. E. Smith and .T. L. E. Lauderdale in the studies on the history and habits. 2 Besides the complementary report by Mr. High, this bulletin includes notes made by him regarding the life history, habits, and enemies of the species in southern Texas. Espe
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