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Gerald Holmes's Images

Title: Product Development Manager
Organization: Valent USA Corporation
Country: United States
Web: http://

1994-1997: Plant Pathology Farm Advisor; Univ of Calif. Cooperative Extension Service, Imperial Co.// 1997-2008: Plant Pathology Extension Specialist; NC State University, Raleigh, NC// 2009-present: Product Development Manager; Valent USA Corporation


Remove Filters: Diseases(X) Root and Butt / Root and Stem Diseases(X)

42 Images of 7 Subjects View Subject List View Image Details View Thumbnails

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Image Subject Name Scientific Name Description
1574141 Pythium diseases Pythium spp. Fruit rot caused by Pythium sp.  
1573300 Pythium diseases Pythium spp. Cottony leak of cucumber. June 1997
1573387 Fusarium wilts, blights, rots and damping-off Fusarium spp. Fusarium sporulation on cantaloupe stem. July 1997
1573388 Fusarium wilts, blights, rots and damping-off Fusarium spp. Fusarium sporulation on cantaloupe stem. July 1997
1573322 Pythium diseases Pythium spp. Cross section of cucumber fruit infected with Pythium cottony leak. June 1997 
1573299 Pythium diseases Pythium spp. Pythium cottony leak of cucumber. June 1997
1573297 Pythium diseases Pythium spp. Pythium cottony leak of cucumber. June 1997
1572972 Pythium diseases Pythium spp. Micrograph of watermelon root tissue with Pythium oospores embedded. May 1997
1572970 Pythium diseases Pythium spp. Micrograph (phase contrast) of watermelon root tissue with Pythium oospore embedded. May 1997
1572969 Pythium diseases Pythium spp. Micrograph of watermelon root tissue with Pythium oospores embedded. May 1997
1572968 Pythium diseases Pythium spp. Micrograph of watermelon root tissue with Pythium oospores embedded. May 1997
1572967 Pythium diseases Pythium spp. Micrograph of watermelon root tissue with Pythium oospore embedded. May 1997
1572966 Pythium diseases Pythium spp. Micrograph of watermelon root tissue showing Pythium oospores throughout. May 1997
1572965 Pythium diseases Pythium spp. Potted watermelon seedling with a Pythium damping-off lesion at the soil line. May 1997
1572964 Pythium diseases Pythium spp. Watermelon seedling showing symptoms of Pythium damping-off. May 1997
1572963 Pythium diseases Pythium spp. Watermelon transplant suffering from damping-off caused by Pythium spp. May 1997
1572962 Pythium diseases Pythium spp. Watermelon transplant suffering from damping-off caused by Pythium spp. May 1997
1572960 Pythium diseases Pythium spp. Pythium root rot (left) and healthy (right) watermelon transplant roots. May 1997
1572958 Pythium diseases Pythium spp. Pythium root rot on watermelon seedling.  Roots should be white (see 1572959 and 1572960). May 1997
1572779 Fusarium wilts, blights, rots and damping-off Fusarium spp. Cross section of cucumber fruit showing the extent of secondary invasion of Fusarium sp. in tissue injured by low temperatures. April 1997?
1573006 Pythium diseases Pythium spp. Pythium oospore (faint round structure in center of frame) in watermelon root tissue.  Phase contrast. May 1997
1573005 Pythium diseases Pythium spp. Oospore of Pythium sp. in watermelon root tissue. May 1997
1571182 Fusarium wilts, blights, rots and damping-off Fusarium spp. Fruit cross section shows the extent of colonization into the fruit.  Fusarium fruit rot on cataloupe may extend much deeper into the internal flesh (mesocarp). April 1995
1571183 Fusarium wilts, blights, rots and damping-off Fusarium spp. External signs of Fusarium fruit rot on cantaloupe show white fungal growth at the ground scar. April 1995
1571186 Fusarium wilts, blights, rots and damping-off Fusarium spp. This images shows Fusarium fruit rot on cantaloupe. Fruit cross section shows the extent of colonization into the fruit.  Note how the lesion separates cleanly from diseased tissue. April 1995
1571187 Fusarium wilts, blights, rots and damping-off Fusarium spp. This image is of Fusarium fruit rot on cantaloupe. Fruit cross section shows the extent of colonization into the fruit.  Note how the lesion separates cleanly from diseased tissue. April 1995
1571184 Fusarium wilts, blights, rots and damping-off Fusarium spp. External signs of Fusarium fruit rot on cantaloupe show white fungal growth at the ground scar. April 1995
1571185 Fusarium wilts, blights, rots and damping-off Fusarium spp. External symptoms of Fusarium fruit rot on cantaloupe show discoloration and softening of tissue at the ground scar. The presence of white fungal growth is dependent on the amount of moisture present. April 1995
1570610 Schweinitzii root and butt disease Phaeolus schweinitzii August 1993
1570611 Schweinitzii root and butt disease Phaeolus schweinitzii August 1993
1570612 Schweinitzii root and butt disease Phaeolus schweinitzii August 1993
1570613 Schweinitzii root and butt disease Phaeolus schweinitzii August 1993
1570266 common jack-o-lantern mushroom Omphalotus olearius Omphalotus olearius. September 1991
1570267 common jack-o-lantern mushroom Omphalotus olearius Omphalotus olearius. September 1991
1570272 Ganoderma root rots Ganoderma spp.
1570593 Clitocybe root diseases Clitocybe spp. August 1993
1570594 Clitocybe root diseases Clitocybe spp. August 1993
1570596 Clitocybe root diseases Clitocybe spp. August 1993
1570675 Clitocybe root diseases Clitocybe spp. September 1993
1570676 Clitocybe root diseases Clitocybe spp. September 1993
1570214 red-belted fungus Fomitopsis pinicola
1570215 red-belted fungus Fomitopsis pinicola

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