| 1570780 |
Research |
Isolation of a single fungal colony of Penicillium ulaiense by streaking (left) from an air exposure plate containing many fungi (right). Plate was exposed for 5 minutes in a citrus orchard and shows that P. ulaiense is present in the field. March 1994 |
| 1570721 |
Structure |
Coremia bend towards the light. September 1993 |
| 1570722 |
Structure |
Coremia bend towards light. September 1993 |
| 1570726 |
Fruit(s) |
Mixed infection of Penicillium ulaiense and Penicillium digitatum. |
| 1570758 |
Research |
Imazalil-resistance assay shows reaction with sensitive biotype after 14 days at 20C. Top row: treated with 1000 ppm imazalil; bottom row: non-treated. Compare with 1570759 for resistant biotype. March 1994 |
| 1570759 |
Research |
Imazalil-resistance assay shows reaction with resistant biotype after 14 days at 20C. Top row: treated with 1000 ppm imazalil; bottom row: non-treated. Compare with 1570758 for sensitive biotype. March 1994 |
| 1570406 |
Research |
Close-up of colony of Isolate J-192 (Penicillium ulaiense) after 7 days growth on Czapek Yeast Agar (CYA) at 25oC. April 1992 |
| 1570398 |
Research |
Culture of Penicillium ulaiense after 7 days growth on Czapek Yeast Agar (CYA) at 25oC. April 1992 |
| 1570399 |
Research |
Culture of Penicillium ulaiense after 7 days growth on Malt Extract Agar (MEA) at 25oC. April 1992 |
| 1570400 |
Research |
Culture of the type isolate of Penicillium ulaiense after 7 days growth on Czapek Yeast Agar (CYA) at 25oC. April 1992 |
| 1570401 |
Research |
Culture of Penicillium ulaiense after 7 days growth on Czapek Agar at 25oC. April 1992 |
| 1570402 |
Research |
Culture of Penicillium ulaiense after 7 days growth on Czapek Agar at 25oC. April 1992 |
| 1570403 |
Research |
Culture of Penicillium ulaiense after 7 days growth on malt extract agar at 25oC. April 1992 |
| 1570404 |
Research |
Culture of Penicillium ulaiense type culture after 7 days growth on malt extract agar at 25oC. April 1992 |
| 1570405 |
Research |
Isolate J-192 of Penicillium ulaiense after 7 days growth on Czapek Yeast Agar (CYA) at 25oC. April 1992 |
| 1570407 |
Research |
Penicillium ulaiense on orange. April 1992 |
| 1570409 |
Research |
Penicillium ulaiense isolate J-192. April 1992 |
| 1570410 |
Research |
Penicillium ulaiense isolate J-192. April 1992 |
| 1570411 |
Research |
Penicillium ulaiense isolate J-192. April 1992 |
| 1570448 |
Research |
Reverse colony pigmentation in Penicillium ulaiense grown for 8 days at different temperatures. May 1992 |
| 1570449 |
Research |
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 |
Research |
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 |
Research |
Growth of Penicillium ulaiense after 7 days at 25oC on Czapek's agar, showing the production of coremia and orange pigment. May 1992 |
| 1570452 |
Research |
Growth of Penicillium ulaiense after 7-10 days at 25oC on malt extract agar, showing the production of coremia. May 1992 |
| 1570453 |
Research |
Penicillium ulaiense growing on malt extract agar and producing characteristic coremia (also called synnemata). May 1992 |
| 1570456 |
Fruit(s) |
Penicillium ulaiense produces coremia. This is a rare example of extensive coremium production on lemon. May 1992 |
| 1570457 |
Fruit(s) |
Penicillium ulaiense produces coremia. Occasionally the entire fruit surface will be covered with coremia. May 1992 |
| 1570458 |
Fruit(s) |
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 |
Fruit(s) |
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 |
Fruit(s) |
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 |
Fruit(s) |
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 |
Fruit(s) |
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 |
Fruit(s) |
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 |
Fruit(s) |
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 |
Fruit(s) |
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 |
Fruit(s) |
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 |
Fruit(s) |
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 |
| 1570491 |
Structure |
Penicillium ulaiense synnema showing a few conidiophores separated from the main column. Stained with lacto-fuchsin. June 1992 |
| 1570475 |
Fruit(s) |
Lemon fruit infected with Penicillium ulaiense (whisker mold) coming out of long-term storage. May 1992 |
| 1570478 |
Fruit(s) |
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 |
| 1570488 |
Asexual Spore |
Penicillium ulaiense produces conidia of variable length. June 1992 |
| 1570489 |
Asexual Spore |
Penicillium ulaiense conidiophores and conidia. |
| 1570490 |
Asexual Spore |
Penicillium ulaiense synnema showing a few conidiophores separated from the main column. Stained with lacto-fuchsin and viewed in phase contrast. June 1992 |
| 1570495 |
Asexual Spore |
Penicillium ulaiense conidia. Shows variability in dimensions of conidia. June 1992 |
| 1570504 |
Structure |
Penicillium ulaiense (cause of citrus whisker mold) growing on thiabendazole-amended Harding's medium. July 1992 |
| 1570505 |
Culture |
Penicillium ulaiense (cause of citrus whisker mold) producing clear exudate on Harding's medium. July 1992 |
| 1570492 |
Structure |
Penicillium ulaiense synnema showing a few conidiophores separated from the main column. Stained with lacto-fuchsin and viewed with phase contrast. June 1992 |
| 1570493 |
Structure |
Penicillium ulaiense synnema showing a few conidiophores separated from the main column. Stained with lacto-fuchsin. June 1992 |
| 1570494 |
Asexual Spore |
Penicillium ulaiense conidiophore, phialides and conidia. Stained with lacto-fuchsin. June 1992 |
| 1570514 |
Fruit(s) |
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 |
| 1570515 |
Research |
Micro-chamber on a microscope slide used to photograph small structures through the microscope. Here it was was used to photograph coremia of Penicillium ulaiense. July 1992 |
| 1570520 |
Research |
Hyphal anastamosis in Penicillium ulaiense. A potential means of exchanging genetic information in imperfect fungi. November 1992 |
| 1570521 |
Structure |
The beginnings of hyphal anastomosis in Penicillium ulaiense. November 1992 |
| 1570522 |
Structure |
The beginnings of hyphal anastomosis in Penicillium ulaiense. November 1992 |
| 1570523 |
Structure |
The beginnings of hyphal anastomosis in Penicillium ulaiense. November 1992 |
| 1570524 |
Structure |
The beginnings of conidia formation in Penicillium ulaiense. November 1992 |
| 1570525 |
Structure |
Hyphal anastomosis in Penicillium ulaiense. November 1992 |
| 1570526 |
Structure |
Conidiophore of Penicillium ulaiense. Note the difference is conidia size from two adjacent phialides. November 1992 |
| 1570527 |
Sign |
|
| 1570528 |
Culture |
Penicillium ulaiense growing on thiabendazole-amended Harding's medium. Note the high level of coremium production. November 1992 |
| 1570537 |
Structure |
Side view of Penicillium ulaiense (whisker mold) coremia growing on agar medium. February 1993 |
| 1570549 |
Structure |
hyphal anastomosis |
| 1570561 |
Culture |
The type isolate of Penicillium ulaiense on malt extract agar. Note the extensive production of coremia. April 1993 |
| 1570562 |
Culture |
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 |
Culture |
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 |
Culture |
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 |
Fruit(s) |
Mixed infection of whisker mold (caused by Penicillium ulaiense) and other Penicillium decay on lemon. Coremia of P. ulaiense are conspicuous. April 1993 |
| 1570567 |
Fruit(s) |
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 |
Fruit(s) |
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 |
Fruit(s) |
Penicillium ulaiense (whisker mold) coremium growing on a background of P. digitatum (green mold), both on orange. February 1993 |
| 1570536 |
Fruit(s) |
Penicillium ulaiense (whisker mold) coremium growing on a background of P. digitatum (green mold), both on orange. February 1993 |
| 1570534 |
Fruit(s) |
Penicillium ulaiense (whisker mold) coremia growing on a background of P. digitatum (green mold), both on orange. November 1992 |
| 1570533 |
Fruit(s) |
Penicillium ulaiense (whisker mold) coremia growing on a background of P. digitatum (green mold), both on orange. November 1992 |
| 1570516 |
Fruit(s) |
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 |
Fruit(s) |
Penicillium ulaiense infection on Ruby grapefruit showing multiple inoculations using the same inoculum, but causing a variety of symptoms. July 1992 |
| 1570511 |
Fruit(s) |
Penicillium ulaiense infection on Ruby grapefruit showing large zone of "clear rot" where the pathogen is causing decay, but not sporulating. July 1992 |
| 1570512 |
Fruit(s) |
Penicillium ulaiense infection on Ruby grapefruit showing conspicuous coremia. July 1992 |
| 1570506 |
Fruit(s) |
Penicillium ulaiense (cause of citrus whisker mold) producing clear exudate on orange. July 1992 |
| 1570502 |
Fruit(s) |
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 |
Fruit(s) |
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 |
