English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Cypress canker is a pandemic disease of cupressaceous plants caused by Seiridium cardinale (Wagener) Sutton & Gibson, a fungus recently shown to be native to California (Della Rocca et al. 2011). Disease outbreaks in California can be severe, especially in areas where cypresses are not indigenous (Danti and Della Rocca 2017). This paper describes a case of cypress canker on MacNab cypress (Cupressus macnabiana A. Murray), a species native to a few inland counties of northern California (Farjon 2005). In July 2009, dieback of several branches was shown to be associated with bark necrosis on a young C. macnabiana in the botanical garden of the University of California at Berkeley (37°52′28.00′′ N, 122°14′18.54′′ W; 223 m a.s.l.), Alameda County, California. Although an isolate from this diseased tree was used in a study published by Della Rocca et al. (2011), symptoms were not described in that study, and Koch’s postulates were not performed. Four dying shoots were collected and fragments of necrotic tissue 0.5 cm2 in size were placed on potato dextrose agar (PDA) in standard 9-cm diameter Petri dishes at the U.C. Berkeley Forest Pathology Laboratory. The fungus S. cardinale was cultured out of all four shoots. Its identity was determined based on cultural, microscopic, and molecular traits. After a 10-day-long incubation at 25°C, the developing colonies had a soft and floccose surface, becoming deep green or grayish-olive in the middle with time. Conidia (mitospores) were obtained from acervuli (asexual fruiting bodies) produced on water agar amended with autoclaved cypress seeds and kept for 2 to 3 weeks at 18°C under a fluorescent and near UV light. They were oblong-fusoid in shape, 6-celled (pentaeuseptate), with four dark brown median cells and two hyaline small end cells. Conidial size was 26.4 × 10.0 μm on average (± 0.8234 × 0.2604 SD). The β-tubulin locus sequence (GenBank accession no. HQ678150) showed a 100% match with S. cardinale sequences of β-tubulin A-type genotypes (Della Rocca et al. 2013). Inoculations on stems were carried out in the greenhouse on six 3-year-old MacNab cypress plants growing in 5Quick Links Add to favorites

First Report of Seiridium cardinale Causing Bark Cankers on MacNab Cypress (Cupressus macnabiana) in California