2011 Annual Report 1a.Objectives (from AD-416) Objective 1: Develop control measures for weeds in vegetables, fruits, and specialty crops. Objective 2: Determine herbicide residues in harvested product. 1b.Approach (from AD-416) Herbicides alone or in combination with cultural and mechanical methods will be evaluated under field conditions and percent weed control by species, crop injury and crop yield will be determined. Plant samples will be collected for determination of herbicide residues. 3.Progress Report As part of an ongoing objective, research was conducted to assess the value of selected herbicides and collect data on use for minor use crops. Experiments were conducted on herbicides for minor use crops, under a specific cooperative agreement with Michigan State University. Fifteen projects were supported in 2010. (Projects were initiated in 2010 for work in FY11.) Projects included: napromide, sulfentrazone, linuron, and clomazone on basil; sulfentrazone on apple; carfentrazone and quinclorac on asparagus; fluazifop and quinclorac on blueberry; quinclorac and fluazifop on caneberry; pendimethalin on cauliflower; fluazifop on rhubarb; and prohexadione calcium on strawberry. Data were collected on crop injury or crop yield; as needed, residue samples were collected for pesticide residue analysis. Completed field notebooks were submitted to the IR-4 headquarters to support the petition processes for label registration of the herbicides on minor use crops. 4.Accomplishments 1. Support of herbicide registration. A majority of minor crops have few pesticides registered to control important pests, including weeds. (Becauase the timeline for registration process is, often, years, none of the trials conducted in the last year have resulted in a new registration yet.) Experiments were conducted on herbicides for potential use in minor use crops, under a specific cooperative agreement with Michigan State University. IR-4 was provided data from fifteen projects. These will be used to support the petition processes for label registration of the above-mentioned herbicides on respective horticultural crops. This accomplishment will benefit the nation’s fruit and vegetable growers, enabling them to continue to provide an abundant supply of domestically produced, nutritious food.