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ARS Home » Pacific West Area » Corvallis, Oregon » Horticultural Crops Disease and Pest Management Research Unit » Research » Research Project #438086

Research Project: Minor Use Pesticide Testing on Floral and Nursery Crops

Location: Horticultural Crops Disease and Pest Management Research Unit

2021 Annual Report

Objective 1: 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.

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.

Progress Report
This project is a new project that started in October 2020 and is a continuation of expired project 0500-00007-111-00D. Researchers in Corvallis, Oregon, conducted 77 crop safety trials. Trials were conducted with 13 different fungicides and one insecticide on a wide range of plant material. Treatments included six trials with Gatten, five trials using SP2700, four trials with Orkestra Intrinsic, four trials conducted using Broadform SC500, nine trials with S2200 4SC, three trials using Segovis, 24 trials with BAS750, six trials conducted with Zio, two trials using Picarbutrozox SC, two trials with Picarbutrozox 20WG, two trials conducted for XDE-659, one trial with TDA-NC-1, four trials with F6123 and five trials conducted with SP3014. The specific plants tested for phytotoxicity were species of Zinnia, Alyssum, Dianthus, Campanula, Salvia splendens, Gerbera, Lupinus, Begonia, Impatiens wallerinia, Trachelospermum jasminoides, Rosmarinus officianalis, Hypericum calycinum, Delphinium grandiflora, Pieris japonica, Hydrangea quercifolia, Clematis, Syringa vulgaris, Magnolia grandiflora, Agapanthus, Spiraea japonica, Euonymus alatus, Forsythia, Spiraea nipponica and Solidago speciosa. The results of these tests were reported to the Interregional Research Project Number 4 (IR-4) project at Rutgers University and are forwarded to the product manufacturer to be used in their request to expand the label to include the tested ornamental plants. All objectives were achieved. This information will aid significantly in registering novel fungicides or biologicals for managing diseases of minor crops, including ornamentals.