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Diseases punctuate the life of greenhouse growers and horticulturalists. Prevention, compliance with sanitary instructions, regular monitoring and interventions (if necessary) are elements to be mastered.
In this article, a synthetic overview of the most common diseases in greenhouses on fruit, vegetable, berry and hemp crops:
Cercospora 
Downy mildew 
Rhizoctonia 
Powdery mildew 
Thielaviopsis
Pythium 
Phytophthora 
Botrytis 
Fusarium 
Bacterial blight
Sources:
Agri-Réseau : Le savoir et l’expertise du réseau agricole et agroalimentaire
Ministry of Agriculture, Food, and Rural Affairs (MAFRA): website
http://omafra.gov.on.ca/english/crops/pub370/pub370ch7.pdf
Principales maladies des plantes de serre: http://omafra.gov.on.ca/french/crops/pub370/pub370ch7.pdf
Traitements phytosanitaires et risques associés – SAgE pesticides
