2007 Annual Report 1a.Objectives (from AD-416) Evaluate various fungicides, insecticides, and herbicides for phytotoxicity and/or efficacy on floral and nursery crop plants in support of label expansion through the IR-4 regional project. 1b.Approach (from AD-416) Selected floral and nursery crop species will be grown in the greenhouse, ground beds, or field plantings and treated according to specific protocols (timing, concentrations) with selected fungicides, insecticides, or herbicides. In some cases, chemicals will be tested for efficacy, but mostly they will be tested on plants for phytotoxicity. Data will be submitted for inclusion in the IR-4 Minor Use Testing Program. Replacing 0500-00007-043-00D (10/99). FY01 $54,878 Program Increase. FY02 Program Increase $16,656. Replacing 0500-00007-056-00D (10/04) and 0500-00007-071-00D (11/2005). 4.Accomplishments Evaluating fungicides for the control of soilborne plant pathogens in nursery crops: The Horticultural Crops Research Unit in Corvallis, OR is currently conducting Super A projects directed at testing 15-20 fungicides against species of Phytophthora and Pythium as the target pathogen genera, specifically the root rot pathogen, P. cinnamomi, Ramorum Blight and dieback pathogen, P. ramorum, and damping-off pathogen of conifer seedlings, Pythium irregulare. In addition, we are testing a number of chemicals for phytotoxicity against several ornamental plants. The results of these tests will provide data specifically focused on controlling Phytophthora and Pythium diseases or nursery crops, identified by scientists as the most important pathogen group affecting the nursery industry. This research was part of National Program 304 on Crop Protection & Quarantine, Component V – Pest Control Technologies, ARS Minor Use Pesticide Program, where the goal is to provide data to the IR-4 Project through Rutgers University in support of pesticide registrations for many crops, including ornamental/nursery crops; Problem Statement E. Chemical Control. 5.Significant Activities that Support Special Target Populations None 6.Technology Transfer