Gerald Holmes's Images
Title: Product Development ManagerOrganization: Valent USA Corporation
Country: United States
Web: http://
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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 |
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| 183 Images of 52 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 1570476 | abiotic stresses (general) | Oleocellosis, also known as oil spotting. May 1992 | |
| 1573004 | Monosporascus root rot | Monosporascus cannonballus | Ascospores of Monosporascus cannonballus. May 1997 |
| 1570552 | Penicillium fungus | Penicillium variabile | Penicilli (brush-like head) of Penicillum variabile. February 1993 |
| 1570546 | Penicillium fungus | Penicillium echinulatum | The penicillus Penicillum echinulatum. February 1993 |
| 1570423 | Penicillium fungus | Penicillium echinulatum | Phialides and conidia of Penicillium echinulatum. April 1992 |
| 1570420 | Penicillium fungus | Penicillium echinulatum | Phialides and conidia of Penicillium echinulatum (phase contrast). April 1992 |
| 1570421 | Penicillium fungus | Penicillium echinulatum | Phialides and conidia of Penicillium echinulatum (100X). April 1992 |
| 1570569 | cold injury (low temperature) | Peteca is a physiological disorder that develops in storage, but is correlated to field conditions such as calcium and potassium levels and harvest during cool, wet periods. Low temperature storage favors its development. April 1993 | |
| 1570570 | cold injury (low temperature) | Peteca is a physiological disorder that develops in storage, but is correlated to field conditions such as calcium and potassium levels and harvest during cool, wet periods. Low temperature storage favors its development. April 1993 | |
| 1570507 | abiotic stresses (general) | Stem end rind breakdown on Valencia organes. July 1992 | |
| 1570294 | brown rot | Monilinia fructicola | Light micrograph of Monilinia fructicola chains of conidia at 100X, phase contrast. December 1991 |
| 1570302 | Pestalotiopsis blight | Pestalotiopsis quepinii | Conidia of Pestalotiopsis guepinii. December 1991 |
| 1570309 | fungus | Helicoma spp. | Helicoma sp. (400X). December 1991 |
| 1570297 | nematophagous fungi | Arthrobotrys oligospora | Arthrobotrys oligospora (400X), nematophagous fungus. December 1991 |
| 1570161 | Potato Virus X | Potexvirus PVX | Chenopodium quinoa 15 days after mechanical inoculation (i.e., carborundum) with Potato Virus X (PVX) showing localized chlorotic spots. March 1990 |
| 1570162 | Potato Virus X | Potexvirus PVX | Nicandra physalodes 15 days after mechanical inoculation (i.e., carborundum) with Potato Virus X (PVX) showing symptoms typical of systemic infection. March 1990 |
| 1570636 | puffballs | Vascellum spp. | Vascellum sp. September 1993 |
| 1570614 | puffballs | Vascellum spp. | Vascellum sp. at various stages of maturity. August 1993 |
| 1570619 | puffball | Lycoperdon spp. | Lycoperdon sp. August 1993 |
| 1570437 | Penicillium fungi | Penicillium spp. | Three Penicillium spp. pathogenic to citrus fruit (left: P. italicum; center: P. digitatum; right: isolate J-192 of P. ulaiense) on malt extract agar (top row) and Czapek yeast agar (bottom row). April 1992 |
| 1570439 | Penicillium fungi | Penicillium spp. | Three Penicillium spp. pathogenic to citrus fruit (left: P. italicum; center: P. digitatum; right: isolate J-192 of P. ulaiense) on malt extract agar (top row) and Czapek yeast agar (bottom row). April 1992 |
| 1570440 | Penicillium fungi | Penicillium spp. | Reverse colony of three Penicillium spp. pathogenic to citrus fruit (left: P. italicum; center: P. digitatum; right: isolate J-192 of P. ulaiense) on malt extract agar (top row) and Czapek yeast agar (bottom row). April 1992 |
| 1570431 | Penicillium fungus | Penicillium commune | April 1992 |
| 1570417 | Penicillium fungus | Penicillium solitum | Phialides and conidia of Penicillium solitum. April 1992 |
| 1570314 | leaf spot | Stemphylium sarciniforme | Stemphylium sarciniforme (400X). December 1991 |
| 1570416 | Penicillium fungus | Penicillium solitum | Phialides and conidia of Penicillium solitum. April 1992 |
| 1570865 | downy mildew | Peronospora destructor | March 1995 |
| 1570565 | sour rot | Geotrichum candidum | Mixed infection of sour rot (caused by Geotrichum candidum) and whisker mold (Penicillium ulaiense) on lemon. The most obvious disease is sour rot, but coremia of P. ulaiense are also present. April 1993 |
| 1570781 | Penicillium fungi | Penicillium spp. | Penicillium digitatum (left) and P. italicum (right) reverse colony color. May 1994 |
| 1570412 | Penicillium fungi | Penicillium spp. | Left: green mold caused by Penicillium digitatum and right: blue mold caused by P. italicum. April 1992 |
| 1570413 | Penicillium fungi | Penicillium spp. | Left: green mold caused by Penicillium digitatum; center: whisker mold caused by Penicillium ulaiense; and right: blue mold caused by P. italicum. All fruit were inoculated the same day and incubated for approximately 5 days at 25oC. Thus, lesion size represents the aggressiveness of each pathogen in citrus fruits. April 1992 |
| 1570553 | Penicillium fungus | Penicillium citreonigrum | Monoverticillate penicillus (brush-like head) of Penicillum citreonigrum. February 1993 |
| 1570554 | Penicillium fungus | Penicillium dendriticum | Biverticillate penicillus (brush-like head) of Penicillum dendriticum. February 1993 |
| 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 |
| 1570815 | blue mold | Penicillium italicum | Reverse colony color variation in Penicillium italicum on Harding's medium. April 1994 |
| 1570293 | brown rot | Monilinia fructicola | Light micrograph of Monilinia fructicola chains of conidia at 400X, phase contrast. December 1991 |
| 1570295 | Fusarium root rot and wilt | Fusarium oxysporum | Microconidia of Fusarium oxysporum (400X). December 1991 |
| 1570296 | Fusarium root rot and wilt | Fusarium oxysporum | Macroconidia of Fusarium oxysporum (400X). December 1991 |
| 1570298 | black root rot | Thielaviopsis basicola | Thielaviopsis basicola (100X), causal agent of black root rot. December 1991 |
| 1570299 | brown spot | Alternaria alternata | Altenaria alternata (400X). December 1991 |
| 1570300 | brown spot | Alternaria alternata | Chains of conidia of Alternaria alternata (100X). December 1991 |
| 1570301 | Ascochyta fungi | Ascochyta spp. | Conidia of Ascochyta sp. (400X). December 1991 |
| 1570303 | Paecilomyces fungi | Paecilomyces spp. | Phialides and condia of Paecilomyces sp. (400X). December 1991 |
| 1570304 | Paecilomyces fungi | Paecilomyces spp. | Phialides and conidia of Paecilomyces sp. (400X). December 1991 |
| 1570306 | downy mildew | Peronospora farinosa | Mass of sporangia and sporangiophores of Peronospora effusa (100X, phase contrast). December 1991 |
| 1570307 | anthracnose | Colletotrichum graminicola | Colletotrichum graminicola (400X), causal agent of anthracnose diseases. December 1991 |
| 1570308 | Gliocladium roseum | Gliocladium roseum | Gliocladium roseum (400X). December 1991 |
| 1570310 | Epicoccum fungus | Epicoccum nigrum | Epicoccum nigrum (400X). December 1991 |
| 1570311 | Trichothecium roseum | Trichothecium roseum | (400X). December 1991 |
| 1570312 | Trichothecium roseum | Trichothecium roseum | (400X). December 1991 |
| 1570373 | powdery mildew | Oidium spp. | Scanning electron micrograph of appressoria of Oidium sp. on Euonymus. |
| 1570374 | powdery mildew | Oidium spp. | Transmission electron micrograph (TEM) of thin section through appressorium of Oidium sp. on Euonymus. Yellow flecks are not part of image, but are surface contaminants of film. February 1992 |
| 1570376 | powdery mildew | Oidium spp. | Scanning electron micrograph (SEM) of conidia of Oidium sp. February 1992 |
| 1570377 | powdery mildew | Oidium spp. | Transmission electron micrograph (TEM) of thin section through appressorium of Oidium sp. on Euonymus. Club-shaped structure is the tip of the appressorium (penetration peg) extending into a host cell. February 1992 |
| 1570378 | powdery mildew | Oidium spp. | Transmission electron micrograph (TEM) of thin section through Oidium sp. on Euonymus at stomatal opening. February 1992 |
| 1570379 | powdery mildew | Oidium spp. | Transmission electron micrograph (TEM) of thin section through appressorium of Oidium sp. on Euonymus. Fungal cell is above and within the host cell. February 1992 |
| 1570380 | powdery mildew | Oidium spp. | Transmission electron micrograph (TEM) of thin section through appressorium and penetration peg of Oidium sp. on Euonymus. Club-shaped structure is the tip of the penetration peg extending into a host cell. February 1992 |
| 1570381 | powdery mildew | Oidium spp. | Transmission electron micrograph (TEM) of Oidium sp. (cause of powdery mildew) appressorium and penetration peg. February 1992 |
| 1570382 | powdery mildew | Oidium spp. | Transmission electron micrograph (TEM) of Oidium sp. (cause of powdery mildew) appressorium and penetration peg. February 1992 |
| 1570383 | powdery mildew | Oidium spp. | Transmission electron micrograph (TEM) of Oidium sp. (cause of powdery mildew) appressorium and penetration peg. February 1992 |
| 1570385 | powdery mildew | Oidium spp. | Transmission electron micrograph (TEM) of Oidium sp. (cause of powdery mildew) appressorium and penetration peg. February 1992 |
| 1570386 | powdery mildew | Oidium spp. | Transmission electron micrograph (TEM) of Oidium sp. (cause of powdery mildew) appressorium and penetration peg. February 1992 |
| 1570387 | powdery mildew | Oidium spp. | Transmission electron micrograph (TEM) of Oidium sp. (cause of powdery mildew) showing multiple appressoria and penetration pegs. February 1992 |
| 1570418 | Penicillium fungus | Penicillium dendriticum | Phialides and conidia of Penicillium dendriticum (100X). April 1992 |
| 1570419 | Penicillium fungus | Penicillium dendriticum | Phialides and conidia of Penicillium dendriticum. April 1992 |
| 1570499 | Aspergillus fungi | Aspergillus spp. | Conidiophore of Aspergillus sp. showing phialides, but no conidia |
| 1570817 | morel | Morchella spp. | June 1994 |
| 1570481 | mushrooms | ||
| 1570616 | mushrooms | mushroom pores August 1993 | |
| 1570632 | mushrooms | September 1993 | |
| 1570615 | Russula mushroom | Russula spp. | August 1993 |
| 1570486 | gastroid mushroom | Gastrocybe spp. | June 1992 |
| 1570485 | gastroid mushroom | Gastrocybe spp. | . June 1992 |
| 1570550 | Penicillium fungus | Penicillium decumbens | Penicillus of Penicillum decumbens. February 1993 |
| 1570551 | Penicillium fungus | Penicillium decumbens | Phialides and conidia of Penicillum decumbens. February 1993 |
| 1570557 | Penicillium fungus | Penicillium dendriticum | Penicilli (brush-like heads) of Penicillium dentriticum. February 1993 |
| 1570559 | Penicillium fungus | Penicillium dendriticum | Phialides and nascent conidia of Penicillium dentriticum. February 1993 |
| 1570560 | Penicillium fungus | Penicillium dendriticum | Biverticillate penicillus (brush-like head) of Penicillium dentriticum. February 1993 |
| 1570609 | stinkhorn | Phallus hadriani | August 1993 |
| 1570592 | Caesar's mushroom | Amanita caesarea | August 1993 |
| 1570617 | yellow cap fungi | Pholiota spp. | August 1993 |
| 1570633 | yellow cap fungi | Pholiota spp. | September 1993 |
| 1570634 | yellow cap fungi | Pholiota spp. | September 1993 |
| 1570638 | Boletus mushroom | Boletus spp. | September 1993 |
| 1570639 | fly agaric | Amanita muscaria | Sepember 1993 |
| 1570468 | gray mold | Botrytis cinerea | Botrytis cinerea on lemon |
| 1570409 | whisker mold | Penicillium ulaiense | Penicillium ulaiense isolate J-192. April 1992 |
| 1570410 | whisker mold | Penicillium ulaiense | Penicillium ulaiense isolate J-192. April 1992 |
| 1570411 | whisker mold | Penicillium ulaiense | Penicillium ulaiense isolate J-192. April 1992 |
| 1570415 | green mold | Penicillium digitatum | Phialides and conidia of Penicillium digitatum, causal agent of citrus green mold. April 1992 |
| 1570425 | blue mold | Penicillium italicum | Condidiophore of Penicillium italicum (causal agent of citrus blue mold). April 1992 |
| 1570426 | blue mold | Penicillium italicum | Light micrograph using phase contrast of condidiophore of Penicillium italicum (causal agent of citrus blue mold). April 1992 |
| 1570427 | blue mold | Penicillium italicum | Light micrograph of dondidiophores of Penicillium italicum (causal agent of citrus blue mold). April 1992 |
| 1570428 | Penicillium fungi | Penicillium spp. | Light micrograph of monoverticillate Penicillium sp. April 1992 |
| 1570429 | Penicillium fungi | Penicillium spp. | Light micrograph of monoverticillate Penicillium sp. April 1992 |
| 1570432 | Penicillium fungi | Penicillium spp. | Light micrograph of unidentified Penicillium sp. April 1992 |
| 1570433 | Penicillium fungi | Penicillium spp. | Light micrograph of unidentified Penicillium sp. April 1992 |
| 1570441 | Penicillium fungi | Penicillium spp. | Reverse colony of two Penicillium spp. pathogenic to citrus fruit (top: P. ulaiense; bottom: P. italicum) on Czapek's agar (far left column), 25% Glycerin (G25N; column 2), malt extract agar (column 3) and Czapek yeast agar (column 4) at 7 days growth at 25oC. April 1992 |
| 1570443 | Penicillium fungi | Penicillium spp. | Colonies of three Penicillium spp. pathogenic to citrus fruit (left: P. ulaiense; center: P. italicum; right: P. digitatum) on 25% Glycerin (top row), Czapek's agar (row 2), Czapek yeast agar (row 3) malt extract agar (row 4) at 7 days growth at 25oC. At this time P. ulaiense had not been identified. April 1992 |
| 1570444 | Penicillium fungi | Penicillium spp. | Colony reverse of three Penicillium spp. pathogenic to citrus fruit (left: P. ulaiense; center: P. italicum; right: P. digitatum) on 25% Glycerin (top row), Czapek's agar (row 2), Czapek yeast agar (row 3) malt extract agar (row 4) at 7 days growth at 25oC. At this time P. ulaiense had not been identified. May 1992 |
| 1570445 | Penicillium fungi | Penicillium spp. | Colony reverse of three Penicillium spp. pathogenic to citrus fruit (left: P. ulaiense; center: P. italicum; right: P. digitatum) on 25% Glycerin (top row), Czapek's agar (row 2), Czapek yeast agar (row 3) malt extract agar (row 4) at 7 days growth at 25oC. At this time P. ulaiense had not been identified. May 1992 |
| 1570446 | Penicillium fungi | Penicillium spp. | Colonies of three Penicillium spp. pathogenic to citrus fruit (left: P. ulaiense; center: P. italicum; right: P. digitatum) on 25% Glycerin (top row), Czapek's agar (row 2), Czapek yeast agar (row 3) malt extract agar (row 4) at 7 days growth at 25oC. At this time P. ulaiense had not been identified. May 1992 |
| 1570448 | whisker mold | Penicillium ulaiense | Reverse colony pigmentation in Penicillium ulaiense grown for 8 days at different temperatures. May 1992 |
| 1570449 | whisker mold | Penicillium ulaiense | Reverse colony of Penicillium ulaiense after 7 days (left) and 14-21 days (right) growth at 25oC, showing the production of funicles in Czapek's agar. This is a distinguishing feature of P. ulaiense. May 1992 |
| 1570450 | whisker mold | Penicillium ulaiense | Growth of Penicillium ulaiense after 14-21 days at 25oC showing the production of coremia and submerged funicles on Czapek's agar. This is a distinguishing feature of P. ulaiense. May 1992 |
| 1570451 | whisker mold | Penicillium ulaiense | Growth of Penicillium ulaiense after 7 days at 25oC on Czapek's agar, showing the production of coremia and orange pigment. May 1992 |
| 1570452 | whisker mold | Penicillium ulaiense | Growth of Penicillium ulaiense after 7-10 days at 25oC on malt extract agar, showing the production of coremia. May 1992 |
| 1570453 | whisker mold | Penicillium ulaiense | Penicillium ulaiense growing on malt extract agar and producing characteristic coremia (also called synnemata). May 1992 |
| 1570455 | green mold | Penicillium digitatum | Lemons treated with imazalil and infected by Penicillium digitatum will decay, but not sporulate. This is an excellent example of the antisporulant effect of imazalil and other triazole fungicides. May 1992 |
| 1570456 | whisker mold | Penicillium ulaiense | Penicillium ulaiense produces coremia. This is a rare example of extensive coremium production on lemon. May 1992 |
| 1570457 | whisker mold | Penicillium ulaiense | Penicillium ulaiense produces coremia. Occasionally the entire fruit surface will be covered with coremia. May 1992 |
| 1570458 | whisker mold | Penicillium ulaiense | Three lemon fruit infected with Penicillium ulaiense in mixture with P. digitatum (green mold). This is typical of the way whisker mold is seen in nature. It is rare to see whisker mold by itself. May 1992 |
| 1570459 | whisker mold | Penicillium ulaiense | Lemon fruit infected with Penicillium ulaiense (whisker mold) in mixture with P. digitatum (green mold). This is typical of the way whisker mold is seen in nature (i.e., in mixed infections). It is rare to see whisker mold by itself. May 1992 |
| 1570460 | whisker mold | Penicillium ulaiense | Lemon fruit infected with Penicillium ulaiense (whisker mold) against a background of P. digitatum (green mold). This is typical of the way whisker mold is seen in nature. It is rare to see whisker mold by itself. May 1992 |
| 1570461 | whisker mold | Penicillium ulaiense | Lemon fruit infected with Penicillium ulaiense (whisker mold) against a background of P. digitatum (green mold). This is typical of the way whisker mold is seen in nature. It is rare to see whisker mold by itself. May 1992 |
| 1570462 | whisker mold | Penicillium ulaiense | Lemon fruit infected with Penicillium ulaiense (whisker mold) against a background of P. digitatum (green mold). This is typical of the way whisker mold is seen in nature. It is rare to see whisker mold by itself. Large bald spot is where the fruit was touching another fruit in a packed carton. May 1992 |
| 1570463 | whisker mold | Penicillium ulaiense | Lemon fruit infected with Penicillium ulaiense (whisker mold) against a background of P. digitatum (green mold). This is typical of the way whisker mold is seen in nature. It is rare to see whisker mold by itself. May 1992 |
| 1570464 | whisker mold | Penicillium ulaiense | Lemon fruit infected with Penicillium ulaiense (whisker mold) against a background of P. digitatum (green mold). This is typical of the way whisker mold is seen in nature. It is rare to see whisker mold by itself. May 1992 |
| 1570465 | whisker mold | Penicillium ulaiense | Lemon fruit infected with Penicillium ulaiense (whisker mold) against a background of P. digitatum (green mold). This is typical of the way whisker mold is seen in nature. It is rare to see whisker mold by itself. May 1992 |
| 1570466 | whisker mold | Penicillium ulaiense | Lemon fruit infected with Penicillium ulaiense (whisker mold) against a background of P. digitatum (green mold). This is typical of the way whisker mold is seen in nature. It is rare to see whisker mold by itself. May 1992 |
| 1570467 | whisker mold | Penicillium ulaiense | Lemon fruit infected with Penicillium ulaiense (whisker mold) against a background of P. digitatum (green mold) in a commercially packed carton of citrus. This is typical of the way whisker mold is seen in nature. It is rare to see whisker mold by itself. May 1992 |
| 1570469 | gray mold | Botrytis cinerea | When Botrytis cinerea infects flowers and young fruit it causes injuries to young fruit which later develop into ridges on mature fruit. May 1992 |
| 1570470 | gray mold | Botrytis cinerea | When Botrytis cinerea infects flowers and young fruit it causes injuries to young fruit which later develop into ridges on mature fruit. May 1992 |
| 1570471 | gray mold | Botrytis cinerea | When Botrytis cinerea infects flowers and young fruit it causes injuries to young fruit which later develop into ridges on mature fruit. May 1992 |
| 1570491 | whisker mold | Penicillium ulaiense | Penicillium ulaiense synnema showing a few conidiophores separated from the main column. Stained with lacto-fuchsin. June 1992 |
| 1570472 | lemon | Citrus x limon | Nesting of gray mold (caused by Botrytis cinerea) in a crate of stored lemons. May 1992 |
| 1570473 | gray mold | Botrytis cinerea | Nesting of gray mold (caused by Botrytis cinerea) in a crate of stored lemons. May 1992 |
| 1570474 | Sclerotinia rot | Sclerotinia sclerotiorum | Cottony rot, caused by Sclerotinia sclerotiorum on lemon. This is an uncommon disease is California and found primarily in long-term storage. May 1992 |
| 1570475 | whisker mold | Penicillium ulaiense | Lemon fruit infected with Penicillium ulaiense (whisker mold) coming out of long-term storage. May 1992 |
| 1570477 | Phytophthora basal canker | Phytophthora palmivora | Brown rot caused by Phytophthora palmivora. May 1992 |
| 1570478 | whisker mold | Penicillium ulaiense | Lemon artificially inoculated with Penicillium ulaiense (right) and P. italicum (blue mold). Because inoculation occurred on the same day, the lesion size shows the relative growth rate of both fungi in lemon. May 1992 |
| 1570497 | Penicillium fungi | Penicillium spp. | Penicillium sp. showing conidiophore with typical biverticillate branching pattern and long chains of conidia. June 1992 |
| 1570495 | whisker mold | Penicillium ulaiense | Penicillium ulaiense conidia. Shows variability in dimensions of conidia. June 1992 |
| 1570496 | Penicillium fungi | Penicillium spp. | Penicillium sp. showing conidiophore with typical biverticillate branching pattern. June 1992 |
| 1570488 | whisker mold | Penicillium ulaiense | Penicillium ulaiense produces conidia of variable length. June 1992 |
| 1570489 | whisker mold | Penicillium ulaiense | Penicillium ulaiense conidiophores and conidia. |
| 1570490 | whisker mold | Penicillium ulaiense | Penicillium ulaiense synnema showing a few conidiophores separated from the main column. Stained with lacto-fuchsin and viewed in phase contrast. June 1992 |
| 1570492 | whisker mold | Penicillium ulaiense | Penicillium ulaiense synnema showing a few conidiophores separated from the main column. Stained with lacto-fuchsin and viewed with phase contrast. June 1992 |
| 1570493 | whisker mold | Penicillium ulaiense | Penicillium ulaiense synnema showing a few conidiophores separated from the main column. Stained with lacto-fuchsin. June 1992 |
| 1570494 | whisker mold | Penicillium ulaiense | Penicillium ulaiense conidiophore, phialides and conidia. Stained with lacto-fuchsin. June 1992 |
| 1570504 | whisker mold | Penicillium ulaiense | Penicillium ulaiense (cause of citrus whisker mold) growing on thiabendazole-amended Harding's medium. July 1992 |
| 1570505 | whisker mold | Penicillium ulaiense | Penicillium ulaiense (cause of citrus whisker mold) producing clear exudate on Harding's medium. July 1992 |
| 1570514 | whisker mold | Penicillium ulaiense | Penicillium ulaiense (cause of whisker mold) in a mixed infection with P. digitatum (green mold) on orange. Coremia are unusually long in this instance. July 1992 |
| 1570528 | whisker mold | Penicillium ulaiense | Penicillium ulaiense growing on thiabendazole-amended Harding's medium. Note the high level of coremium production. November 1992 |
| 1570537 | whisker mold | Penicillium ulaiense | Side view of Penicillium ulaiense (whisker mold) coremia growing on agar medium. February 1993 |
| 1570538 | blue mold | Penicillium expansum | Penicillium expansum conidiophore. February 1993 |
| 1570539 | blue mold | Penicillium expansum | Penicillium expansum conidiophore. February 1993 |
| 1570540 | blue mold | Penicillium expansum | Penicillium expansum conidiophore with few conidia adhering to phialides. February 1993 |
| 1570542 | blue mold | Penicillium italicum | The penicillus (metuale, phialides and conidia) of Penicillium italicum. February 1993 |
| 1570543 | blue mold | Penicillium italicum | Phialides and conidia of Penicillum italicum (causal agent of citrus blue mold). February 1993 |
| 1570544 | blue mold | Penicillium italicum | Conidia of Penicillum italicum (causal agent of citrus blue mold). Note the variability in size. February 1993 |
| 1570545 | blue mold | Penicillium italicum | Conidia of Penicillum italicum (causal agent of citrus blue mold). Note the variability in size. February 1993 |
| 1570549 | whisker mold | Penicillium ulaiense | hyphal anastomosis |
| 1570555 | green mold | Penicillium digitatum | |
| 1570556 | green mold | Penicillium digitatum | |
| 1570561 | whisker mold | Penicillium ulaiense | The type isolate of Penicillium ulaiense on malt extract agar. Note the extensive production of coremia. April 1993 |
| 1570562 | whisker mold | Penicillium ulaiense | A California isolate of Penicillium ulaiense on malt extract agar. Note the extensive production of coremia and concentric rings of the culture. April 1993 |
| 1570563 | whisker mold | Penicillium ulaiense | A California isolate of Penicillium ulaiense on malt extract agar. Note the extensive production of coremia and concentric rings of the culture. April 1993 |
| 1570564 | whisker mold | Penicillium ulaiense | The type isolate (left) and a California isolate (right) of Penicillium ulaiense on malt extract agar. Note the extensive production of coremia and concentric rings of the culture. April 1993 |
| 1570566 | whisker mold | Penicillium ulaiense | Mixed infection of whisker mold (caused by Penicillium ulaiense) and other Penicillium decay on lemon. Coremia of P. ulaiense are conspicuous. April 1993 |
| 1570567 | whisker mold | Penicillium ulaiense | Whisker mold (Penicillium ulaiense) on lemon showing large drops of exudate. This feature is characteristic of whisker mold, but only present in 30-40% of cases. April 1993 |
| 1570568 | whisker mold | Penicillium ulaiense | Whisker mold (Penicillium ulaiense) on lemon showing large drops of exudate. This feature is characteristic of whisker mold, but only present in 30-40% of cases. April 1993 |
| 1570535 | whisker mold | Penicillium ulaiense | Penicillium ulaiense (whisker mold) coremium growing on a background of P. digitatum (green mold), both on orange. February 1993 |
| 1570536 | whisker mold | Penicillium ulaiense | Penicillium ulaiense (whisker mold) coremium growing on a background of P. digitatum (green mold), both on orange. February 1993 |
| 1570534 | whisker mold | Penicillium ulaiense | Penicillium ulaiense (whisker mold) coremia growing on a background of P. digitatum (green mold), both on orange. November 1992 |
| 1570533 | whisker mold | Penicillium ulaiense | Penicillium ulaiense (whisker mold) coremia growing on a background of P. digitatum (green mold), both on orange. November 1992 |
| 1570516 | whisker mold | Penicillium ulaiense | Penicillium ulaiense (whisker mold) on Valencia orange. Conspicuous coremium production distinguishes this pathogen from P. italicum (blue mold). Photo taken at 30 days following artificial inoculation. September 1992. |
| 1570513 | whisker mold | Penicillium ulaiense | Penicillium ulaiense infection on Ruby grapefruit showing multiple inoculations using the same inoculum, but causing a variety of symptoms. July 1992 |
| 1570511 | whisker mold | Penicillium ulaiense | Penicillium ulaiense infection on Ruby grapefruit showing large zone of "clear rot" where the pathogen is causing decay, but not sporulating. July 1992 |
| 1570512 | whisker mold | Penicillium ulaiense | Penicillium ulaiense infection on Ruby grapefruit showing conspicuous coremia. July 1992 |
| 1570506 | whisker mold | Penicillium ulaiense | Penicillium ulaiense (cause of citrus whisker mold) producing clear exudate on orange. July 1992 |
| 1570502 | whisker mold | Penicillium ulaiense | Mixed infection of Penicillium ulaiense (whisker mold) and P. digitatum (green mold) on orange. This is the way whisker mold is generally seen in packinghouses (i.e., in a mixed infection with green mold). July 1992 |
| 1570503 | whisker mold | Penicillium ulaiense | Mixed infection of Penicillium ulaiense (whisker mold) and P. digitatum (green mold) on orange. This is the way whisker mold is generally seen in packinghouses (i.e., in a mixed infection with green mold). July 1992 |
| 1570510 | green mold | Penicillium digitatum | Valencia oranges showing sporulation control of Penicillium digitatum by the fungicide imazalil. July 1992 |
| 1570165 | green mold | Penicillium digitatum | Lemons (treated with 1000 and 2000 ppm imazalil and non-treated) inoculated with Penicillium digitatum (imazalil-sensitive isolate M6R) show the typical reaction. Treated fruit rot, but sporulation and the degree of decay is reduced by treatment with imazalil. August 1990 |
| 1570395 | green mold | Penicillium digitatum | Culture of Penicillium digitatum showing a sector with a different growth pattern and texture. February 1992 |
| 1570479 | blue mold | Penicillium italicum | Lemon treated with imazalil in a commercial packinghouse and infected with imazalil-resistant Penicillium italicum (blue mold). May 1992 |
| 1570482 | inky cap | Coprinus spp. | Ink cap mushroom (Caprinus sp.). June 1992 |
| 1570483 | inky cap | Coprinus spp. | Ink cap mushroom (Caprinus sp.). June 1992 |
| 1570484 | inky cap | Coprinus spp. | Ink cap mushroom (Caprinus sp.). June 1992 |
