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 Horticultural Crops Disease and Pest Management Research Unit: Corvallis, OR
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ARS Home Pacific West Area Corvallis, Oregon Horticultural Crops Disease and Pest Management Research Unit Research





- Weiland, Gerald - Jerry
- 2023
- 2022
- 2021
- Crop Protection & Quarantine (304)

Research Project: Minor Use Pesticide Testing on Floral and Nursery Crops **Location:
                            Horticultural Crops Disease and Pest Management Research Unit** 2022 Annual Report **Objectives**
                                

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. **Approach**
                                

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**
                                

ARS scientists in Corvallis, Oregon, are evaluating fungicides and other pesticides for phytotoxicity effects on floral and nursery crop plants in support of label expansion through the IR-4 regional project. ARS researchers in Corvallis, Oregon, conducted 55 crop safety trials. Trials were conducted with 13 different fungicides on a wide range of plant material. Treatments included eight trials with BAS 516 09F, three trials with BAS 640 00F, five trials with BCS991, one trial with F6123, one trial with Broadform 5C500, eight trials with IKF-309, one trial with S2200 4SC, nine trials with Avelyo, four trials with Picarbutrazox, four trials with Postiva, eight trials with SP2478, two trials with SP2700 AS, and one trial with XDE-659. The specific plants tested for phytotoxicity were species of arrowwood viburnum, aster, azalea, begonia, burning bush, calibrachoa, camellia, potentilla, crape myrtle, chrysanthemum, fuchsia, geranium, impatiens, spirea, Leyland cypress, marigold, pansy, rose, hibiscus, sage, sunflower, gerber daisy, and violet.

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. **Accomplishments**


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