Boxwood blight, caused by Calonectria pseudonaviculata and Calonectria henricotiae, has had devastating effects in gardens since its first appearance in the United Kingdom in 1994. The disease affects two other plants in the Buxaceae: sweet box (Sarcococca spp.) and pachysandra (Pachysandra spp.). C. pseudonaviculata was likely introduced to Europe by nursery trade from East Asia on an ornamental species and then to western Asia and North America. Thus far, C. henricotiae has been seen only in Europe. Boxwood, valued at $126 million wholesale per year in the United States alone, is now besieged by an aggressive foliar blight active over a broad temperature range when there are long periods of leaf wetness. Research on inoculum, means of dissemination, cultivar susceptibility, environmental influences, fungicides, sanitizers, and detection methods has vastly improved knowledge of this new invasive disease in a short time. Boxwood with genetic resistance to the disease is critically needed.

中文翻译：

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黄杨木枯萎病：对观赏植物的威胁。

自1994年在英国首次出现以来，由拟南芥（Calonectria pseudonaviculata）和拟南芥（Calonectria henricotiae）引起的黄杨枯萎病已在花园中造成破坏性影响。该病影响了黄杨科中的另外两种植物：甜盒（Sarcococca spp。）和pachysandra（Pachysandra spp。） ）。假单胞菌很可能是通过东亚的观赏物种从苗圃贸易传入欧洲的，然后传入西亚和北美。迄今为止，仅在欧洲可见到C. henricotiae。黄杨木，仅在美国，每年的批发价值就达1.26亿美元，如今，由于长期潮湿的叶子被湿叶侵袭，在宽广的温度范围内活跃着叶枯病。研究接种物，传播方式，品种易感性，环境影响，杀菌剂，消毒剂，检测方法在短时间内极大地提高了对这种新侵袭性疾病的了解。迫切需要对这种疾病具有遗传抗药性的黄杨木。