Effect of soil applications of Effect of soil applications of insecticides on the growth and yield of vegetable crops effectofsoilappl926ston Year: 1953 Ltrcular No. 9x6 August 195 3 • Washington, D. C. UNITED STATES DEPARTMENT OF AGRICULTURE Effect of Soil Applications of Insecticides on the Growth and Yield of Vegetable Crops1 By M. W. Stone, entomologist, and F. B. Foley and D. H. Bixby,2 field aides, Division of Truck Crop and. Garden Insect Investigations, Bureau of Ento- mology and Plant Quarantine, Agricultural Research Administration 3 Contents Page Introduction 1 Review of literatu
Effect of soil applications of Effect of soil applications of insecticides on the growth and yield of vegetable crops effectofsoilappl926ston Year: 1953 Ltrcular No. 9x6 August 195 3 • Washington, D. C. UNITED STATES DEPARTMENT OF AGRICULTURE Effect of Soil Applications of Insecticides on the Growth and Yield of Vegetable Crops1 By M. W. Stone, entomologist, and F. B. Foley and D. H. Bixby,2 field aides, Division of Truck Crop and. Garden Insect Investigations, Bureau of Ento- mology and Plant Quarantine, Agricultural Research Administration 3 Contents Page Introduction 1 Review of literature 2 General pre cedure 2 Experimental method 2 Cultural practices 4 Pest control 5 Tests on different crops 6 Lima beans 6 Cabbage 9 Cauliflower 9 Lettuce , 10 Celery 10 Carrots 10 Onions 11 Page Tests on different crops—Continued Table beets 11 Sweetpotatoes 11 Spinach 11 Tomatoes 12 Peppers 12 Peas 12 Potatoes 14 Residue analyses 15 Toxaphene 15 Aldrin 17 Flavor of vegetables 17 Summary 18 Literature cited 19 INTRODUCTION The effect of residues from soil applications of insecticides on the growth of plants has long been a matter of concern to ento- 1 Submitted for publication April 16, 1953. 2 Now with the Division of Plant Quarantines at Honolulu, T. H. 3 The authors acknowledge the assistance of Roy Hudson in 1949, C. 0. Gaston and A. Sarinana in 1950, and W. Larramedy in 1951. The lima bean growers Joseph and John Laubacher also assisted and furnished tractors and equipment for incorporating the insecticides with the soil. The Vujovich Bros, provided irrigation pipe. The Coastal Chemical Co. and the McCrae Chemical Co. applied the soil fumigants. The following companies furnished insecti- cides: Eston Chemicals, Inc., Hercules Powder Co., Velsicol Corp., and the Julius Hyman Co. The writers are also indebted to H. K. Burr and staff of the Western Regional Laboratory of the Bureau of Agricultural and Indus- trial Chemistry for appraising the flavor of several of the cr
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