. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Washington, D. C. ? Angusl, 1924 STUDIES OF THE MEXICAN BEAN BEETLE' IN THE By Neale F. Howard, Entomologist, and L. L. English, Junior Entomologist, Truck Crop Insect Investigations, Bureau of Entomology. CONTENTS. Page. Introduction 1 Description 3 Distribution 4 Naturalspread 5 Life history and habits 6 Seasonallife history 11 Page. Food plants 14 Hibernation 17 Natural control 25 Generalmethods of control 29 Artificial control 30 Summary of control recommendations 48 Summary 49 INTRODUCTION. Wherever it
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Washington, D. C. ? Angusl, 1924 STUDIES OF THE MEXICAN BEAN BEETLE' IN THE By Neale F. Howard, Entomologist, and L. L. English, Junior Entomologist, Truck Crop Insect Investigations, Bureau of Entomology. CONTENTS. Page. Introduction 1 Description 3 Distribution 4 Naturalspread 5 Life history and habits 6 Seasonallife history 11 Page. Food plants 14 Hibernation 17 Natural control 25 Generalmethods of control 29 Artificial control 30 Summary of control recommendations 48 Summary 49 INTRODUCTION. Wherever it occurs the Mexican bean beetle is by far the most serious enemy of beans. It has been known for about 75 years in the Southwest, where it has undoubtedly been established for a longer period. It was long ago reported that in Colorado its possi- bilities as a pest were greater than those of the Colorado potato Id many sections in the Southeast it is often the determining factor in the growing of beans. The original home of this beetle is southern North America. It occurs in many parts of Mexico and in Guatemala. The species was first discovered in the Southeast in 1920, when specimens were received at the Alabama Experiment Station from Blocton and Birmingham, Ala. Authentic reports by various growers indicate that the insect was not at all uncommon about Birmingham in 1919, and it is presumed that it reached Alabama at least as early as 1918. It has been pointed out by Dr. W. E. Hinds that during the recent European war large shipments of alfalfa hay from the West were received in northern Alabama, and it is possible that the insect was introduced with these shipments, the infestation originating from the Southwest rather than from Mexico. In 1921 the insect was reported from Thomasville, Ga., by S. E. McClendon, the infes- tation indicating the presence of the beetle there for at least one year before that time. 1 Epilachna corrupta Muls.; order Coleoptera, family Co
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