Studies were continued to develop a biocontrol strategy mainly with Coniothyrium minitans to manage lettuce drop caused by S. minor in lettuce production areas of both Yuma County, AZ and Imperial Co, CA. Results from this study revealed that lettuce drop caused by S. minor could also be successfully managed with Coniothyrium minitans in a desert agroecosystem. However, the rate of application of C. minitans required to manage S. minor was much higher than that required to control S. sclerotiorum (2lb/acre).