louisiana yards and neighborhoods
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www.lsuagcenter.com/lyn. Louisiana Yards and Neighborhoods. Common Landscape Diseases. Diseases occur on landscape plants when environmental conditions are suitable for pathogens to develop on them. - PowerPoint PPT PresentationTRANSCRIPT
Louisiana Yards and Neighborhoods
Louisiana Yards and Neighborhoods
Common
Landscape Diseases
Common
Landscape Diseaseswww.lsuagcenter.com/lyn
Diseases in the Landscape
Diseases in the Landscape
Diseases occur on landscape plants when environmental conditions are suitable
for pathogens to develop on them.
Prevention is the key to the management of disease in the
landscape.
Diseases occur on landscape plants when environmental conditions are suitable
for pathogens to develop on them.
Prevention is the key to the management of disease in the
landscape.
Powdery Mildew
Powdery Mildew
• Caused by fungi
• Spread by wind
• Favored by high humidity and moderate temperatures
• Caused by fungi
• Spread by wind
• Favored by high humidity and moderate temperatures
Leaf Spots and BlightsLeaf Spots and Blights
• Caused by fungi, bacteria and algae
• Spread primarily by wind and splashing water
• Favored by extended periods of leaf wetness and high humidity
• Caused by fungi, bacteria and algae
• Spread primarily by wind and splashing water
• Favored by extended periods of leaf wetness and high humidity
AnthracnoseAnthracnose
• Caused by fungi
• Attack all aboveground plant parts
• Spread primarily by splashing water
• Favored by extended periods of leaf wetness and high humidity
• Caused by fungi
• Attack all aboveground plant parts
• Spread primarily by splashing water
• Favored by extended periods of leaf wetness and high humidity
Fire BlightFire Blight• Caused by a bacterium
• Spread by splashing water, bees and on pruning tools
• Enters primarily through flowers
• Prune out infected branches
• Choose resistant varieties
• Caused by a bacterium
• Spread by splashing water, bees and on pruning tools
• Enters primarily through flowers
• Prune out infected branches
• Choose resistant varieties
Root and Crown Rots
Root and Crown Rots
• Caused primarily by fungi, “water molds” and nematodes
• Spread primarily in water, soil and planting materials
• Favored by poor drainage and excess moisture
• Caused primarily by fungi, “water molds” and nematodes
• Spread primarily in water, soil and planting materials
• Favored by poor drainage and excess moisture
VirusesViruses
• Spread primarily by insects, in infected sap and through propagation material
• Once a plant is infected, there is no cure
• Spread primarily by insects, in infected sap and through propagation material
• Once a plant is infected, there is no cure
Turf Grass Patch
Diseases
Turf Grass Patch
Diseases• Caused primarily by
fungi, “water molds” and nematodes
• Environmental stresses often predispose turf to pathogen attack
• Follow BMPs for growing and maintaining healthy turf to prevent disease
• Caused primarily by fungi, “water molds” and nematodes
• Environmental stresses often predispose turf to pathogen attack
• Follow BMPs for growing and maintaining healthy turf to prevent disease
Fairy RingsFairy Rings
• Caused primarily by fungi that produce mushrooms or “toadstools.”
• These fungi grow on buried wood, tree roots or other organic matter in the soil, not on the grass!
• Difficult to control; must break up the hydrophobic fungal layer in the soil.
• Caused primarily by fungi that produce mushrooms or “toadstools.”
• These fungi grow on buried wood, tree roots or other organic matter in the soil, not on the grass!
• Difficult to control; must break up the hydrophobic fungal layer in the soil.
Environmental Factors
Environmental Factors
• Do not spread from plant to plant
• Caused by factors such as drought, excess water, nutrient deficiencies or toxicities, etc.
• Do not spread from plant to plant
• Caused by factors such as drought, excess water, nutrient deficiencies or toxicities, etc.
Louisiana Yards and Neighborhoods
Louisiana Yards and Neighborhoods
Common
Landscape Diseases
Common
Landscape Diseaseswww.lsuagcenter.com/lyn