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Charles Averre's Images

Organization: North Carolina State University
Country: United States
Remove Filters: Foliage Diseases(X)
64 Images of 6 Subjects View Subject List View Image Details View Thumbnails

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Image Subject Name Scientific Name Description
1563689 edema Edema are blisters forming on the surface of roots.  The blisters may rupture and turn black when (Feb92, cv.Jewel) l
1563690 edema Cross section through an edema blister on the surface of a root.  Notice the enlarged, colorless cells forming the blister that easily ruptures and turn black when colonized by microbes (Feb92, cv.Jewel)  
1563691 edema Cross section through an edema blister on the surface of a root.  Notice the enlarged, colorless cells forming the blister that easily ruptures and turn black when colonized by microbes (Feb92, cv.Jewel)  
1563692 edema Cross section through an edema blister on the surface of a root.  Notice the enlarged, colorless cells forming the blister that easily ruptures and turn black when colonized by microbes (Feb92, cv.Jewel)  
1563701 edema Edema pustules usually are on the abaxial leaf surface.  
1563702 edema Edema pustules on leaf.  Left abaxial surface with many pustules, right adaxial surface has no pustules.
1563686 edema Photomicrograph showing enlarged cells in a blister between the periderm and parenchyma, 100x. (Jan92).
1563687 edema Edema are blisters forming on the surface of roots.  The blisters may rupture and turn black when ruptured and colonized by microbes (Feb92, cv.Jewel).
1563688 edema Edema are blisters forming on the surface of roots.  The blisters may rupture and turn black when ruptured and colonized by microbes (Feb92, cv.Jewel)
1563682 edema Edema are blisters forming on the surface of roots.  The blisters may rupture and turn black when ruptured and colonized by microbes. 
1563683 edema Photomicrograph showing enlarged cells in a blister. 
1563685 edema Photomicrograph showing enlarged cells in a blister between the periderm and parenchyma, 100x. (Jan92)
1563678 edema  Edema are blisters forming on the surface of roots.  Lower roots also with black rot.  
1563679 edema Edema are blisters forming on the surface of roots.
1563680 edema Edema are blisters forming on the surface of roots.  The blisters may rupture and turn black when ruptured and colonized by microbes.
1563011 anthracnose Colletotrichum orbiculare Notice how centers of the leaf spots tend to fall out.
1563125 edema Notice pimple at the far left and afew scattered in the center. 
1563127 edema
1563074 powdery mildew Podosphaera fuliginea Powdery mildew of cucumbers is a serious and common problem in greenhouses.
1563075 powdery mildew Podosphaera fuliginea Powdery mildew of cucumbers is a serious and common problem in greenhouses in North Carolina .
1563076 powdery mildew Podosphaera fuliginea Powdery mildew of cucumbers is a serious and common problem in greenhouses in North Carolina
1563078 powdery mildew Podosphaera fuliginea Photomicrograph at 200x of conidia and conidiphores of Sphaerotheca fuliginea on a clear tape mount in water. 
1563080 powdery mildew Podosphaera fuliginea Photomicrograph at 400x of conidia and conidiphores of Sphaerotheca fuliginea on a clear tape mount in water. 
1563086 scab Cladosporium cucumerinum
1563087 scab Cladosporium cucumerinum
1563088 Tomato Ringspot Virus Nepovirus ToRSV Notice reduced growth of vines and clumping of symptomatic plants.
1563089 Tomato Ringspot Virus Nepovirus ToRSV Notice yellowing and dead lower leaves.  Upper leaves are small. 
1563090 Tomato Ringspot Virus Nepovirus ToRSV
1563091 Tomato Ringspot Virus Nepovirus ToRSV
1563092 Tomato Ringspot Virus Nepovirus ToRSV
1563093 Tomato Ringspot Virus Nepovirus ToRSV Infected plants tend to be clumped reflecting presence of the daggar nematode vector.  Notice small leaves and much shortened internodes.
1563047 downy mildew Pseudoperonospora cubensis Photomicrograph at 30x of downy mildew leafspot on abaxial surface.  The dark colored sporangia can be seen on the sporangiophores.
1563048 downy mildew Pseudoperonospora cubensis Photomicrograph at 30x of downy mildew leafspot on abaxial surface.  The dark colored sporangia can be seen on the sporangiophores.  Notice size of leaf hairs.
1563001 anthracnose Colletotrichum orbiculare Plant breeder evaluation of cultivars for disease resistance.  Far left row shows resistance to anthracnose.  Second row appears susceptible. 
1563002 anthracnose Colletotrichum orbiculare Left, Lewis Howe, County Agent and right Jamie Driver, Research Technician evaluating fungicides for controlling foliar diseases.  Note sandy soil typical of cucumber fields in eastern North Carolina. 
1563003 anthracnose Colletotrichum orbiculare Devastating consequences of anthracnose.
1563004 anthracnose Colletotrichum orbiculare Devastating effect of anthracnose in a commercial cucumber field in eastern North Carolina.  (ca. 1970)
1563005 anthracnose Colletotrichum orbiculare Volunteer cucumber seedlings following the spring crop provide inoculum for fall crop.
1563006 anthracnose Colletotrichum orbiculare anthracnose and downy mildew on the same plant
1563007 anthracnose Colletotrichum orbiculare Postharvest symptoms of anthracnose on slicing cucumber in the fall crop. 1962
1563008 anthracnose Colletotrichum orbiculare
1563009 anthracnose Colletotrichum orbiculare
1563010 anthracnose Colletotrichum orbiculare
1563012 anthracnose Colletotrichum orbiculare Close up of anthracnose leafspot showing slightly raised, salmon-colored acervuli with black, hair-like setae protruding.  Adaxial leaf surface. 
1563013 anthracnose Colletotrichum orbiculare Photomicrograph (400x) showing a leaf hair, three black setae, and many single cell conidia from a wet mount of an anthracnose leaf spot. 
1563014 anthracnose Colletotrichum orbiculare Photomicrograph (400x) showing a leaf hair, three black setae, and many single cell conidia from a wet mount of an anthracnose leaf spot.
1563015 anthracnose Colletotrichum orbiculare Photomicrograph (400x) showing hyaline, elongated, single celled conidia and black setae with pointed tips. 
1563016 anthracnose Colletotrichum orbiculare Photomicrograph (400x) showing hyaline, elongated, single celled conidia and black setae with pointed tips.
1563024 downy mildew Pseudoperonospora cubensis Notice that young leaves have no lesions, older leaves have many lesions, and lower leaves are dead.  Individual leaf spots have a slight orange/yellow hue and are often angular.
1563025 downy mildew Pseudoperonospora cubensis Large cucumber field in eastern North Carolina with much downy mildew.
1563026 downy mildew Pseudoperonospora cubensis Notice orange/yellow hue of leafspots
1563027 downy mildew Pseudoperonospora cubensis Notice that older leaves show most leaf spots.  Lower leaves are dead.  Individual leaf spots have a slight orange/yellow hue and are often angular.
1563028 downy mildew Pseudoperonospora cubensis Cucumber field defoliated. 
1563029 downy mildew Pseudoperonospora cubensis Notice that older leaves show most leaf spots.  Lower leaves are dead.  Individual leaf spots have a slight orange/yellow hue and are often angular.
1563030 downy mildew Pseudoperonospora cubensis Young cucumber plants with downy mildew.  Notice that individual leaf spots have a slight orange/yellow hue and are often angular.
1563031 downy mildew Pseudoperonospora cubensis Notice that older leaves show most leaf spots.  Lower leaves are dead.  Individual leaf spots have a slight orange/yellow hue and are often angular.
1563033 downy mildew Pseudoperonospora cubensis Notice that older leaves show most leaf spots.  Lower leaves are dead.  Individual leaf spots have a slight orange/yellow hue and are often angular.
1563034 downy mildew Pseudoperonospora cubensis Downy mildew does not overwinter in North Carolina, and the spores arrive each year at different times in the summer from areas to the south.  The disease is favored by wet and hot weather. 
1563035 downy mildew Pseudoperonospora cubensis Downy mildew leaf spots are initially yellow/orange and then become necrotic with the entire leaf eventually dying. 
1563042 downy mildew Pseudoperonospora cubensis Early symptoms on young leaf
1563043 downy mildew Pseudoperonospora cubensis Photomicrograph (200x) showing sporangia, typical branching of sporangiophores, and leaf hairs. 
1563044 downy mildew Pseudoperonospora cubensis Downy mildew.  Leaf spots are angular, yellow/orange. 
1563045 downy mildew Pseudoperonospora cubensis Downy mildew.  Leaf spots are angular, yellow/orange. 
1563046 downy mildew Pseudoperonospora cubensis Close up of downy mildew.  Leaf spots are angular, yellow/orange. 

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