Therefore, we proposed that pathogen B. dothidea and V. sordida can derive NSCs directly from living and/or death cells for mycelial growth, particularly at the early stage of cankerdiseases of poplar. In contrast, tree defense was activated upon pathogen contact with living cells and some... Interestingly, the PoplarTree has a fascinating history. Valued by the Greeks and Romans, who created shields from the tree’s wood, the PoplarTree grew out of fashion for a time. The wood, which until recently was considered poor-quality, is now being used for a variety of projects. Dothichiza canker, caused by Plagiostoma populinum (formerly Cryptodiaporthe populea), was found killing Lombardy poplartrees in Portland, OR in 2005 and in the Seattle, Washington area in 2013. The disease is widespread on Lombardy poplar in North America and Europe in... Introduction. Poplar stem cankerdiseases caused by necrotrophic fungal pathogens, Valsa sordida and Botryosphaeria dothidea, are the two crucial treediseasesin north China that severely damaged the development of ecological and economic plantations of poplar species. Chinese scientists have successfully developed an integrated green control strategy to combat cankerdisease affecting poplartrees in the Qinghai-Tibet Plateau. They have achieved a sustained disease control rate exceeding 80 percent in field trials over a one-year period. Most diseasedpoplars show a cracked stem or branch, exuding frothy fluid (Figure 2C; Li et al., 2014). The cankers expand rapidly, and in serious cases, poplars with these cankers may die, or entire branches may be broken off by wind (Figure 2D). The bacterial swollen stem canker of poplar is prevalent in planted poplars of northeast China. Serious damage occurs in the form of necrosis, putridity, cankers, swollen stems and discolored wood of trunks and branches of young and mature trees. Abstract. Diseases affecting branches and trunks of poplartrees (Populus spp.) cause severe damage inpoplar cultivation areas within China. In this study, thirty-three poplar trunks and branches exhibiting canker symptoms were collected from Beijing and Ningxia provinces, China. Informational table showing disease name, symptoms, pathogen/cause, and management of Poplardiseases.Remove infected trees. Cytospora canker. Twigs and larger branches die. Project Narrative. Lombardy poplars are a fast-growing, deciduous tree with a relatively short life span. This species is susceptible to stem cankerdisease (Dothichiza populea) which is caused by the microorganisms known as Crytodiaporthe populea.
