英 [ˈdaɪbæk] 美 [ˈdaɪbæk]
n. [植保] 顶梢枯死
dieback /ˈdaɪˌbæk/
名词 a disease of trees and shrubs characterized by death of the young shoots, which spreads to the larger branches: caused by injury to the roots or attack by bacteria or fungi (植物根部受伤或受细菌、真菌等侵害造成的)顶梢枯死
动词 (of plants) to suffer from dieback (植物)顶梢枯死
a disease of plants characterized by the gradual dying of the young shoots starting at the tips and progressing to the larger branches
顶死
于是我自己就定义和总结了一个说法，也顺便为百度百科的词条做一下贡献： 顶梢枯死（Dieback）指一些植物从顶梢开始逐渐向下枯死的现象，可能由疾病或非疾病因素引起。
... 顶矢状弦 parietal chord 顶死 dieback 顶索 acrochordal ...
... dichloroxide氧化二氯 dieback （of forest species）森林林种的梢枯病；顶梢枯死 dieldrin狄氏剂 ...
丁香干癌极毛杆菌Pseudomonas syringae pv.syrinage所引起的细菌性枝枯病（Dieback）在匈牙利和新西兰发生。
A new disease named legume dieback of Cassia tora was first found in Taian of Shandong Province during 2006—2007.
2007年在山东农业大学中药材试验站栽培的药用植物草决明上发现一种新病害，定名为草决明荚枯病。
It will also be offset by an increase in forest dieback elsewhere, caused by rising aridity, drought, pests and fires-all symptoms of global warming.
而且其他地区由于全球变暖导致的干旱、虫害和火灾造成的森林退化也令人担忧。
There are many concerns. One of them is that avoided deforestation may not be permanent—especially where there is a risk of climate-induced forest dieback.
目前还存在着重重顾虑，其中之一是被避免的毁林活动或许并不能一劳永逸，特别是在那些存在由气候导致的森林梢枯病风险的地区，情况更是如此。
"The concern here is that these might be early warning signs of dieback, " said Stephenson.
Dieback has been confirmed at 115 sites with Norfolk, Suffolk, Kent and Essex among the worst affected.
The disease causes leaf loss and crown dieback in affected trees, and it can lead to tree death.