Recent advances of the causal agent of yellow leaf disease (YLD) on areca palm (<i>Areca catechu</i> L.)

A putative ormycovirus potentially associating with the yellow leaf disease of areca palm

“…However, it does not preclude the possibility that this virus could potentially contribute to the manifestations of YLD under speci c conditions. This notion aligns with the observation that APYLaOMV is absent in healthy areca palm samples and the fact that YLD is a complex disease, exhibiting a wide range of symptoms (Khan et al, 2023). Consequently, our ndings introduce a new candidate for consideration in the ongoing exploration of the mechanisms underlying YLD in areca palm.…”

“…Areca palm (Areca catechu L.) is extensively cultivated as a cash crop in South and Southeast Asian countries (Khan et al, 2023). In China, areca palm cultivation is predominantly concentrated in Hainan Province.…”

“…YLD was rst observed in areca palm in India in1914 and is characterized by leaf yellowing, alongside with a range of other manifestations (Yu et al, 2015). In Hainan, an estimated 40% of areca palm acreage is affected by YLD, leading to substantial economic losses (Khan et al, 2023).…”

Data_Sheet_1.docx

“…The betel palm (Areca catechu L.) is one of the most economically significant crops cultivated in Southeast Asia, with its commercial value being highest in China and India due to its widespread popularity as a chewable product (Khan et al, 2023). In 2020, the total output value of betel nut fruit in Hainan province, China, reached 14.68 billion yuan (2 billion USD), becoming a vital source of income for 2.2 million farmers, accounting for ca.…”

“…Widespread monoculture has led to a decrease in agricultural biodiversity, resulting in an increasing threat from insects and diverse phytopathogens. Among these threats, Yellowing Leaf Disease (YLD) stands out as the most devastating (Johnson et al, 2015;Wang et al, 2020;Khan et al, 2022Khan et al, , 2023. As the name suggests, leaf chlorosis is the most prominent symptom, and in the later stages, the palm's crown size decreases, and "bunchy top" symptoms appear, causing a sharp decline in the yield and quality of betel nut (Yu et al, 2015;Cao et al, 2021;Zhang et al, 2022).…”