Publications by authors named "Helga Forster"

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New fungicides to manage Phytophthora root and crown rots of sweet cherry in California.
Chaydon O'Fallon, Helga Forster, James Adaskaveg

Plant Dis· November 2025

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Evaluation of new Oomycota fungicides to manage Phytophthora crown and trunk cankers of almond and their systemic movement after soil application.
Chaydon O'Fallon, Helga Forster, James Adaskaveg

Plant Dis· November 2025

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Toxicity of registered and new fungicides to current species of infecting almond in California and their fungicidal properties.
Chaydon O'Fallon, Wei Hao Belisle, Greg Todd Browne, Helga Forster, James Adaskaveg

Plant Dis· September 2025

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Moderate and High Propiconazole Resistance Characterized in the Citrus Postharvest Sour Rot Pathogen Is Based on Point Mutations in but Not .
Albert M Nguyen, Helga Förster, James E Adaskaveg

Phytopathology· August 2025

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Cyproconazole, a new postharvest demethylation inhibitor (DMI) fungicide to manage citrus sour rot and green mold caused by DMI-resistant pathogens.
Albert Minh Tri Nguyen, Helga Forster, Doug Cary, James Adaskaveg

Plant Dis· May 2025

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Identification of and in Citrus Packinghouses in California, Their Sensitivity to Cyproconazole, and Incomplete Cross-Resistance to Propiconazole.
Albert M Nguyen, Helga Förster, James E Adaskaveg

Plant Dis· April 2025

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Regional Comparisons of Sensitivities of and Causing Citrus Brown Rot in California to Four New and Two Older Fungicides.
Nathan M Riley, Helga Förster, James E Adaskaveg

Plant Dis· June 2024

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Diversity and Clonality in Populations of and Causing Brown Rot of Citrus in California.
Nathan Riley, Helga Förster, James E Adaskaveg

Phytopathology· April 2024

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A Novel IncX Plasmid Mediates High-Level Oxytetracycline and Streptomycin Resistance in from Commercial Pear Orchards in California.
George W Sundin, Jingyu Peng, Lindsay E Brown, Quan Zeng, Helga Förster

Phytopathology· December 2023

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New Preharvest Treatments and Strategies in Managing Phytophthora Brown Rot of Citrus in California.
Wei Hao, Helga Förster, Rodger J Belisle, James E Adaskaveg

Plant Dis· July 2023

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Root Absorption and Limited Mobility of Mandipropamid as Compared to Oxathiapiprolin and Mefenoxam After Soil Treatment of Citrus Plants for Managing Phytophthora Root Rot.
Rodger J Belisle, Wei Hao, Nathan Riley, Helga Förster, James E Adaskaveg

Plant Dis· April 2023

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Mutations in Gene Subunits Confer Different Cross-Resistance Patterns to SDHI Fungicides in Causing Alternaria Leaf Spot of Almond in California.
Helga Förster, Yong Luo, Lingling Hou, James E Adaskaveg

Plant Dis· July 2022

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Organic Acid Sanitizers for Natamycin and Other Fungicides in Recirculating Application Systems for Citrus Postharvest Decay Management.
Daniel Chen, Helga Förster, Kevin Nguyen, James E Adaskaveg

Plant Dis· October 2021

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Natamycin, a Biofungicide for Managing Major Postharvest Fruit Decays of Citrus.
Daniel Chen, Helga Förster, James E Adaskaveg

Plant Dis· May 2021

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Resistance to Potassium Phosphite in Species Causing Citrus Brown Rot and Integrated Practices for Management of Resistant Isolates.
Wei Hao, Helga Förster, James E Adaskaveg

Plant Dis· April 2021

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Mobility of Oxathiapiprolin and Mefenoxam in Citrus Seedlings After Root Application and Implications for Managing Phytophthora Root Rot.
Morgan A Gray, Kevin A Nguyen, Wei Hao, Rodger J Belisle, Helga Förster

Plant Dis· December 2020

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Epidemiology and Management of Bacterial Spot of Almond Caused by pv. , a New Disease in California.
Stacey E Haack, Layne Wade, Helga Förster, James E Adaskaveg

Plant Dis· June 2020

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Evaluation of New Oomycota Fungicides for Management of Phytophthora Root Rot of Citrus in California.
Wei Hao, Morgan A Gray, Helga Förster, James E Adaskaveg

Plant Dis· April 2019

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Natamycin, a New Biofungicide for Managing Crown Rot of Strawberry Caused by QoI-Resistant Colletotrichum acutatum.
Stacey E Haack, Kelly L Ivors, Gerald J Holmes, Helga Förster, James E Adaskaveg

Plant Dis· September 2018

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Baseline Sensitivities of New Fungicides and Their Toxicity to Selected Life Stages of Phytophthora Species from Citrus in California.
Morgan A Gray, Wei Hao, Helga Förster, James E Adaskaveg

Plant Dis· April 2018

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Temporal Occurrence and Niche Preferences of Phytophthora spp. Causing Brown Rot of Citrus in the Central Valley of California.
Wei Hao, Timothy D Miles, Frank N Martin, Gregory T Browne, Helga Förster

Phytopathology· March 2018

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Characterization of Streptomycin Resistance in Isolates of Erwinia amylovora in California.
Helga Förster, Gayle C McGhee, George W Sundin, James E Adaskaveg

Phytopathology· October 2015

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Pythium brassicum sp. nov.: A Novel Plant Family-Specific Root Pathogen.
Michael E Stanghellini, Mojtaba Mohammadi, Helga Förster, James E Adaskaveg

Plant Dis· December 2014

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Baseline Sensitivities for New Postharvest Fungicides Against Penicillium spp. on Citrus and Multiple Resistance Evaluations in P. digitatum.
Loukas Kanetis, Helga Förster, James E Adaskaveg

Plant Dis· February 2008

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Spiral gradient dilution, a rapid method for determining growth responses and 50% effective concentration values in fungus-fungicide interactions.
Helga Förster, Loukas Kanetis, James E Adaskaveg

Phytopathology· February 2004

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