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Category: InvasiveSpecies

Downy Mildew APHIS Research Summary

Over a 5-year timeframe starting in 2013, the team of researchers listed above investigated several downy mildews – Impatiens and Cucurbit, primarily,

Posted in Efficacy, InvasiveSpecies, Pathology, Plant Pathology Efficacy

2016 Downy Mildew Workshop

  The IR-4 Ornamental Horticulture Program hosted this Downy Mildew Workshop, funded by USDA-NIFA-SCRI

Posted in Environmental Horticulture Program, InvasiveSpecies, Pathology

Dossier – Impatiens Downy Mildew

Due to impatiens downy mildew (IDM), the wholesale value to impatiens dropped 32% from 2004 to 2015.

Posted in InvasiveSpecies, Pathology

Dossier – Pansy Downy Mildew

When we think of pansy diseases, Botrytis blight, Cercospora leaf spots and various root rots top the list, but pansy downy mildew occurs sporadically often not

Posted in InvasiveSpecies, Pathology

Dossier – Viburnum Downy Mildew

Viburnums generally tend to have few disease problems other than occasional leaf spots, powdery mildew or root rots. However, in FL the occurrence

Posted in InvasiveSpecies, Pathology

Dossier – Rose Downy Mildew

Roses are impacted by many diseases and insects. While rose downy mildew caused by Peronospora sparsa used to be considered of sporadic importance,

Posted in InvasiveSpecies, Pathology

Gladiolus Rust APHIS Research Summary

The project entitled “Determining the impact of registered and non-registered fungicides and disinfestants on Uromyces transversalis, the causal agent of

Posted in Efficacy, Environmental Horticulture Program, InvasiveSpecies, Pathology, Plant Pathology Efficacy

Arthropod Shipping and European Pepper Moth APHIS Research Summary

The project entitled “Developing sustainable methods for controlling invasive pests on ornamental plant cuttings” had 6 objectives with two primary goals of

Posted in Efficacy, Entomology, Entomology Efficacy, InvasiveSpecies

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This website is based upon work that is supported by the National Institute of Food and Agriculture, U.S. Department of Agriculture, under award numbers 2017-34383-27100, 2019-34383-29973, and 2020-34383-32455 with substantial cooperation and support from the State Agricultural Experiment Stations, USDA-ARS, USDA-APHIS, and USDA-FAS. In accordance with Federal Law and US Department of Agriculture policy, this institution is prohibited from discriminating on the basis of race, color, national origin, sex, age or disability.

  • About IR-4
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    • Careers
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