Proper timing of treatments, as well as choice of insecticides, is highly important in preventing losses in both yield and quality from lygus bug feeding on lima beans. In these tests, early applications were important and use of the organo-phosphorus insecticides Cygon alone, or malathion in combination with toxaphene proved most effective for control of this pest.

Assistance in this study was received from: W. R. Bowen and R. L. Hale, Laboratory Technicians, University of California, Riverside; R. A. Brendler, Farm Advisor, Ventura County; Owen Rice and Ed Maring, lima bean growers, Santa Maria; Leslie Culbert, lima bean grower, Oxnard; Tony Machado, Machado Flying Service, Santa Maria; Ted Venegas, T. F. McLoughlin Dusters, Inc., Oxfard; and Coastal Chemical Company, Oxnard.