Information below focuses on general information on biological and chemical disease control, as well as specific pathogens control. Please note the 'Go To' lists that I developed here at the University of Maryland that are based on recommendations of the top plant pathologists nationally as well as positive remarks from growers.
U of MD 'Go To' Disease Control:
'Go To' Disease Control Chemicals
General:
Proven Winners Liner Pest and Disease Control Rotation
Mary Hausbeck Disease Control (2016)
Bedding plant diseases (Penn State, 2017)
BioSafe ppm Cheat Sheet.
New options for battling plant diseases (Chase and Palmateer, GPN, July, 2016).
Insecticide, Miticide, & Fungicide Guide (2021; GrowerTalks)
Managing common root and foliar diseases of spring greenhouse crops (Madeiras)
Disease Control with Biologicals:
Managing diseases in greenhouses with biologicals (Smith, 2016)
Biosafe PPM cheat sheet.
Influence of Recirculating systems:
Disease Management - Influence of a surfactant in recirculating systems on plant mortality caused by zoosporic root-infecting pathogens. (Stanghellini and Nielson, AFE Special Research Report #121)
Floor/Bench/Cutting Sterilization:
Biosafe Greenhouse and Nursery cleaning and sanitation
Biosafe PPM cheat sheet.
FOLIAR DISEASES
Anthracnose
Botrytis
Botrytis and Anthracnose control - 2016
The influence of diurnal temperatures on the postharvest susceptibility of poinsettia to Botrytis cinerea (Pritchard, Hausbeck and Heins. 1996).
Fungal Leaf Spots (Cercospera, etc.)
Now is the time to watch for fungal disease in hydrangeas (Pugliese, 2020).
Downy Mildew:
IR-4 Downy mildew fungicide efficacy trials (Palmer and Vea, 2010).
The return of downy mildew (Martin, 2010)
Fusarium:
Fusarium wilts of ornamental crops and their management (Gullino et al., 2015. Crop Protection., 73:50-59.
Management of Fusarium wilt of lettuce (Gordon and Koike, 2015. Crop Protection., 73:45-49.
Phytophthora:
Phytophthora rot on ornamentals (Hausbeck, 2017)
Powdery Mildew
Silicon modulates multi-layered defense against powdery mildew in Arabidopsis (Wang et al., 2020).
Aerial Rhizoctonia
Rust
Rust diseases of ornamental crops (Mass, 2013)
'Tis the season to protect your mums from rust (Catlin, 2012)
Chrysanthemum white rust (Trolinger, SAF)
Rust Control
BACTERIAL DISEASES
Agrobacterium:
Crown Gall: Agrobacterium tumefaciens (Ball Horticultural Co., 2016)
Pseudomonas:
Xanthomonas
Evaluation of Aliette for control of Xanthomonas campestris pv pelargonii on the greenhouse grown geranium 'Tango' (Pfleger, Pokorny and Gould, 1991).
Southern wilt of geranium (Beckerman, 2003).
ROOT ROTS
Pythium:
Evaluation of Alliette on control of Pythium ultimum root rot (Pfleger, Pokorny and Gould, 1990).
3 tips for preventing root rot (Krug, 2014)
Phytophthora:
Phytophthora rot on ornamentals (Hausbeck, 2017)
Rhizoctonia Root Rot
Thelaviopsis Root Rot
VIRUSES
Tomato Spotted Wilt Virus:
Tomato spotted wilt virus (Pfleger, Ascerno and Wawrzynski, 1995).
Alternanthera Mosaic Virus
Alternanthera Mosaic Virus (AltMV) (Catlin, 2017).
DISEASES ON SPECIFIC CROPS:
Perennials:
Diseases of perennials (Daughtrey, 1999).
Roses:
Rose diseases and their control (Chase)
The return of downy mildew (Martin, 2010)
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