Cacao seedlings blight caused by Phytophthora palmivora
An outbreak of cacao seedling blight caused by Phytophthora palmivora in 1986, is the first record of Phytophthora on cacao in Hawaii. All diseased seedlings grew from seeds imported from Costa Rica or Belize. Cross inoculations have shown that P. palmivora (MF-1) strains from papaya, orchids, macadamia, and cacao are specialized. Chlamydospores of cacao isolates were slightly larger than those of papaya isolates, although sporangial dimensions were comparable. All isolates from infected cacao were of the A2 compatibility type while all papaya and macadamia isolates of P. palmivora were A1. With one exception, all isolates of P. palmivora from orchids in Hawaii were also Al. To prevent the establishment of a new P. palmivora strains, eradication of all infected seedling lots was recommended.
| Main Authors: | , , |
|---|---|
| Format: | biblioteca |
| Published: |
Dic
|
| Subjects: | THEOBROMA CACAO, PLANTULAS, PHYTOPHTHORA PALMIVORA, ENFERMEDADES FUNGOSAS, AISLAMIENTOS, HAWAII, |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | An outbreak of cacao seedling blight caused by Phytophthora palmivora in 1986, is the first record of Phytophthora on cacao in Hawaii. All diseased seedlings grew from seeds imported from Costa Rica or Belize. Cross inoculations have shown that P. palmivora (MF-1) strains from papaya, orchids, macadamia, and cacao are specialized. Chlamydospores of cacao isolates were slightly larger than those of papaya isolates, although sporangial dimensions were comparable. All isolates from infected cacao were of the A2 compatibility type while all papaya and macadamia isolates of P. palmivora were A1. With one exception, all isolates of P. palmivora from orchids in Hawaii were also Al. To prevent the establishment of a new P. palmivora strains, eradication of all infected seedling lots was recommended. |
|---|