. Bulletin der US-Landwirtschaft. Die Landwirtschaft. SWS^? LfU 1 Bulletin Nr. 539 f Beitrag vom Büro der Entomologie L. O. HOWARD, Chief. Washington, DC PROFESSIONAL PAPIER. September 8, 1917 DIE WENIGER MAIS STIEL - BORER. 1 von Philip Luginbill und Geo. G. Ainslie, entomologischen Assistenten, Getreide und Futterpflanzen Insekt Untersuchungen. Einleitung 1 Geschichte 2 Systematische Geschichte und synonymie 3 Geografische Verteilung 4 Lebensmittel Pflanzen 5 jüngsten Verletzungen 6 INHALT. Rage. Beschreibungen saisonale Geschichte... Aufzuchtmethoden.. Natürliche Feinde... Methoden der Kontrolle. Literatur zitieren

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. Bulletin of the U.S. Department of Agriculture. Agriculture. SWS^?LfU 1 BULLETIN No. 539 f Contribution from the Bureau of Entomology L. O. HOWARD, Chief. Washington, D. C. PROFESSIONAL PAPER. September 8, 1917 THE LESSER CORN STALK-BORER.1 By Philip Luginbill and Geo. G. Ainslie, Entomological Assistants, Cereal and Forage Insect Investigations. Introduction 1 Economic history 2 Systematic history and synonymy 3 Geographical distribution 4 Food plants 5 Recent injuries 6 CONTENTS. rage. Descriptions Seasonal history... Rearing methods.. Natural enemies... Methods of control. Literature cited.... 12 23 21 24 25 INTRODUCTION. Although the lesser com stalk-borer (Elasmopalpus lignosellus Zell.) heretofore has occurred in injurious abundance only in sporadic outbreaks, it now has become an insect of considerable economic importance in the Southern States, since crops grown in the poorest types of soils, or in soils lacking humus, are usually the most seriously affected. The injuries to plants by larvae of this species sometimes resemble closely those of certain beetle larvae commonly known as "budworms" (Diabrotica 12-punctata Fab.) and it seems probable that injuries frequently attributed to the latter are in reality the work of the lesser corn stalk-borer. While engaged in other investigations early in the season of 1913 near Columbia, S. C, the senior author was informed by the authori- ties superintending the State farm near that city that the lesser corn stalk-borer was responsible for considerable damage to their field crops almost every year. Investigations begun immediately were continued through 1914 and 1915. The junior author, while engaged in certain investigations in Florida during the winter of 1913-14, encountered this same species in destructive numbers. The following paper, therefore, is a compilation of the results ob- tained from studies made at Columbia, S. C, during the years 1913- 1915 by the senior author (27)2 and at Lakeland, Fla.,

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