Incidence of major pome fruit tree viruses and viroids in commercial pear orchards in China and in Pyrus betulifolia seedlings

Abstract

Latent viral infections are common in pome fruit trees, including apple, pear, and quince, leading to significant reductions in yield and quality (reviewed by Umer et al., 2019). Twenty-one viruses, belonging to 12 genera classified into nine families, have been identified to infect pome fruit trees (Umer et al., 2019). In addition, a novel virus, provisionally named pear chlorotic leaf spot-associated virus (PCLSaV), has been recently identified in pear trees in China (Liu et al., 2020). Among them, apple stem grooving virus (ASGV), apple stem pitting virus (ASPV), apple chlorotic leaf spot virus (ACLSV), and apple mosaic virus (ApMV) are considered the most economically important viruses affecting pome fruit trees worldwide. In

Shoot tip cryotherapy for plant pathogen eradication

“…Therefore, the use of pathogen-free planting materials is pivotal for efficient control of these diseases and the global exchange of genetic resources (Barba et al, 2017;Ghosh et al, 2021Ghosh et al, , 2022Laimer & Barba, 2011;Wang, Cui, et al, 2018). Often, the most straightforward method for obtaining clean plants is by germinating seeds and growing seedlings, because most pathogens are not transmitted through seeds, although there are some exceptions (Bradamante et al, 2021;Ma et al, 2021). This is not an option for plants that are propagated using vegetative methods such as grafting or layering or rooting of cuttings because the pathogens are carried over into the new plants.…”