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Showing posts from September, 2012

September 15, 2012

Flowering Plant Video Library - Late Summer Flowering Annuals II

Karl Foord - Extension Educator, Horticulture

Click on the link to see the video with host Dr. Mary Meyer, Professor of Horticulture


Broomcorn (Sorghum vulgare)




Karl Foord
Photo 1: Broomcorn (Sorghum vulgare)

Sweet William (Dianthus barbatus)




Karl Foord
Photo 2: Sweet William (Dianthus barbatus)

Indian Blanket (Gaillardia pulchella)






Karl Foord
Photo 3: Indian Blanket (Gaillardia pulchella)

Flowering Plant Video Library - Fruit Trees

Karl Foord - Extension Educator, Horticulture

Click on the link to see the video with host Dr. Mary Meyer, Professor of Horticulture

Sour Cherry, Pie Cherry (Prunus cerasus 'Northstar')





Karl Foord
Photo 1: Sour Cherry (Prunus cerasus 'Northstar')




Canadian Serviceberry (Amelanchier canadensis)




Karl Foord
Photo 2: Canadian Serviceberry (Amelanchier canadensis)




Grapes (Vitis spp.)






Karl Foord
Photo 3: Grapes (Vitis spp.)




Apples I: Dwarfing Rootstock and Pruning (Malus domestica)





Karl Foord
Photo 4: Dwarf Apple (Malus domestica)



Apples II: Pest Management (Malus domestica)





Karl Foord
Photo 4: Pears (Pyrus communis)



Pears (Pyrus communis)

Flowering Plant Video Library - Late Summer Flowering Perennials II

Karl Foord - Extension Educator, Horticulture

Click on the link to see the video with host Dr. Mary Meyer, Professor of Horticulture


Turtlehead (Chelone lyonii)





Karl Foord
Photo 1: Turtlehead (Chelone lyonii)


Boneset (Eupatorium maculatum)




Karl Foord
Photo 2: Boneset (Eupatorium maculatum)



Canada Goldenrod (Solidago canadensis)






Karl Foord
Photo 3: Canada Goldenrod (Solidago canadensis)




September 3, 2012

Spotted Wing Drosophila Update

Jeffrey Hahn, Asst. Extension Entomologist


Jeff Hahn
Photo 1: Spotted wing drosophila female on blackberry

Since the presence of spotted wing drosophila (SWD) Drosophila suzukii was first confirmed in Minneapolis at the beginning of August (see August 15, 2012 Yard and Garden News, ), there have many reports of this fruit fly in other parts of the state. As of the end of August, SWD has been confirmed in 11 counties and suspected in another three, ranging as far north and west as Alexandria (Douglas County) and down to the southeast corner of the state.

Although SWD was found for the first time this year, it is possible that it had been present in Minnesota a year or two earlier but at levels to low to be detected. Regardless of when it first appeared in Minnesota, it is likely that the abundance we experienced this year was the result of spring weather that literally carried up large numbers of SWD on storm fronts. We have seen a variety of other insects this year that were likel…

Basil Downy Mildew found in Minnesota

M. McGrath, Cornell University, Bugwood.org
Photo 1: Angular leaf yellowing caused by downy mildew on basil


Michelle Grabowski, University of Minnesota Extension Educator

Downy mildew of basil has been officially reported in Ramsey and Washington counties in Minnesota. This new disease was first reported in Florida in 2007. Since then it has spread to many more states.

Basil downy mildew is caused by the pathogen Peronospora belbahrii. This pathogen thrives in warm, humid conditions. It can move into the garden in infected seed or transplants or as airborne spores.

Plants infected with basil downy mildew first display yellowing of lower leaves. Upon close examination, gardeners will notice that the yellowing appears to occur in sections restricted by major veins. This causes a blocky or angular yellow sections on the leaf. If the lower surface of the leaf is examined, dark colored spores can be seen as a dirty looking fuzz that grows directly below the yellow sections of the leaf. A …

Downy Mildew on Impatiens Drops Leaves Across Minnesota

Michelle Grabowski, University of Minnesota Extension Educator



M. Grabowski, UMN Extension/p> Photo 1: Impatiens infected with downy mildew
Earlier this year we warned gardeners to be on the look out for downy mildew on impatiens. As we anticipated the downy mildew pathogen is here in Minnesota and many gardeners are now observing symptoms of this disease. Impatiens that have yellow lower leaves or look like naked stems due to leaf drop should be closely inspected. Downy white growth on the lower surface of the leaves can be used to confirm the disease. For more information about downy mildew on impatiens visit our previous disease alert.

Flowering Plant Video Library - Late Summer Flowering Bulbs

Karl Foord - Extension Educator, Horticulture

Click on the link to see the video with host Dr. Mary Meyer, Professor of Horticulture

Lavender Globe Lily & Curly Garlic Chives (Allium spp.)



Karl Foord
Photo 1: Curly Garlic Chives (Allium spirale)

Autumn Lily - Late Summer Flowers (Lycoris squamigera)




Karl Foord
Photo 2: Autumn Lily Flowers (Lycoris squamigera)

Lavender Glove Lily (Allium tanguticum 'Summer Beauty')




Karl Foord
Photo 3: Cleome or Spider Flower (Cleome hassleriana)

Blackberry Lily (Belamcanda chinensis)




Karl Foord
Photo 4: Blackberry Lily (Belamcanda chinensis)

Flowering Plant Video Library - Late Summer Flowering Annuals

Karl Foord - Extension Educator, Horticulture

Click on the link to see the video with host Dr. Mary Meyer, Professor of Horticulture

Flowering Tobacco (Nicotiana sylvestris)




Karl Foord
Photo 1: Flowering Tobacco (Nicotiana sylvestris)



Karl Foord
Photo 2: Flowering Tobacco (Nicotiana sylvestris)

Cleome or Spider Flower (Cleome hassleriana)




Karl Foord
Photo 3: Cleome or Spider Flower (Cleome hassleriana)

Pot Marigold (Calendula officinalis)





Karl Foord
Photo 4: Pot Marigold (Calendula officinalis)

Flowering Plant Video Library - Late Summer Flowering Perennials

Karl Foord - Extension Educator, Horticulture

Click on the link to see the video with host Dr. Mary Meyer, Professor of Horticulture

Joe-Pye Weed (Eupatorium purpureum 'Gateway')




Karl Foord
Photo 1: Joe Pye Weed (Eupatorium purpureum 'Gateway')

Hardy Hibiscus, Rose Mallow (Hibiscus moscheutos 'Blue River II')




Karl Foord
Photo 2: Hardy Hibiscus Rose Mallow (Hibiscus moscheutos 'Blue River II)

Balloon Flower (Platycodon grandiflorus)




Karl Foord
Photo 3: Balloon Flower (Platycodon grandiflorus)

Lesser Calamint (Calamintha nepeta)




Karl Foord
Photo 4: Lesser Calamint with Sweat Bee (Calamintha nepeta)



Karl Foord
Photo 5: Lesser Calamint with Honeybees (Calamintha nepeta)

Flowering Plant Video Library - Miscellaneous Grasses III

Karl Foord - Extension Educator, Horticulture

Click on the link to see the video with host Dr. Mary Meyer, Professor of Horticulture


Prairie Cordgrass, Sloughgrass (Spartina pectinata)




Karl Foord
Photo 1: Prairie Cordgrass, Sloughgrass (Spartina pectinata)

Karl Foerster Feather Reed Grass (Calamagrostis x acutiflora 'Karl Foerster')





Karl Foord
Photo 2: Karl Foerster Feather Reed Grass (Calamagrostis x acutiflora 'Karl Foerster')

Prairie Dropseed (Sporobolus heterolepis)




Karl Foord
Photo 3: Prairie Dropseed (Sporobolus heterolepis)

Dwarf Forms of Prairie Dropseed (Sporobolus heterolepis 'Tara' and Morning Mist')





Karl Foord
Photo 4: Dwarf Prairie Bluestem: 'Tara' left, 'Morning Mist' right (Sporobolus heterolepis)

Prairie Blues and Carousel Little Bluestem (Schizachyrium scoparium)




Karl Foord
Photo 5: Prairie Blues Little Bluestem ( Schizachyrium scoparium 'Prairie Blues')



Karl Foord
Photo 6: Carousel Little Bluestem (Schizachyrium scopar…

Flowering Plant Video Library - Miscellaneous Grasses II

Karl Foord - Extension Educator, Horticulture

Click on the link to see the video with host Dr. Mary Meyer, Professor of Horticulture

Bottlebrush Grass (Elymus hystrix)




Karl Foord
Photo 1: Bottlebrush Grass (Elymus hystrix)

River Oats Wood Oats (Chasmanthium latifolium)




Karl Foord
Photo 2: River Oats, Wood Oats (Chasmanthium latifolium)

Elijah Blue Fescue Grass (Festuca glauca 'Elijah Blue')




Karl Foord
Photo 3: Elijah Blue Fescue (Festuca glauca 'Elijah Blue')

Silver Spike Grass (Achnatherum calamagrostis)




Karl Foord
Photo 4: Silver Spike Grass (Achnatherum calamagrostis)

Tufted Hair Grass (Deschampsia cespitosa)




Karl Foord
Photo 5: Tufted Hair Grass (Deschampsia cespitosa)

Flowering Plant Video Library - Miscellaneous Grasses I

Karl Foord - Extension Educator, Horticulture

Click on the link to see the video with host Dr. Mary Meyer, Professor of Horticulture


Fireworks Fountain Grass (Pennisetum setaceum 'Fireworks')




Karl Foord
Photo 1: Fireworks Fountain Grass (Pennisetum setaceum 'Fireworks')

Blue Grama Grass (Bouteloua gracilis)




Karl Foord
Photo 2: Blue Grama Grass - early flowering (Bouteloua gracilis)



Karl Foord
Photo 3: Blue Grama Grass - mature seed heads (Bouteloua gracilis)

Blue Lyme Grass (Elymus arenarius)




Karl Foord
Photo 4: Blue Lyme Grass (Elymus arenarius)

Heat Damage to Blue Lyme Grass (Elymus arenarius)




Karl Foord
Photo 5: Heat damage to Blue Lyme Grass (Elymus arenarius)

Flowering Plant Video Library - Sedges

Karl Foord - Extension Educator, Horticulture

Click on the link to see the video with host Dr. Mary Meyer, Professor of Horticulture


Creeping Broadleaf Sedge (Carex siderosticha 'Variegata')




Karl Foord
Photo 1: Creeping Broadleaf Sedge (Carex siderosticha 'Variegata')

Variegated Muskingum Sedge (Carex muskingumensis 'Oehme')




Karl Foord
Photo 2: Variegated Muskingum Sedge (Carex muskingumensis 'Oehme')

Bunny Blue and Silver Sceptre Sedges




Karl Foord
Photo 3: Bunny Blue Spreading Sedge (Carex laxiculmis 'Bunny Blue')



Karl Foord
Photo 4: Silver Sceptre Sedge (Carex morrowii 'Silver Sceptre')

Ice Dance Variegated Sedge (Carex morrowii 'Ice Dance')




Karl Foord
Photo 5: Ice Dance Variegated Sedge (Carex morrowii 'Ice Dance')

Palm Sedge (Carex muskingumensis)



Karl Foord
Photo 6: Native Palm Sedge (Carex muskingumensis)

Rhizomatous vs. Bunching Sedges