Influence of weather factors on severity of yellow leaf disease of sugarcane

Abstract

Saccharum officinarum L.) is one of the most well-known and economically important crops grown in the country's tropical and subtropical regions. Sugarcane is cultivated in over 100 nations across 26 million acres of land in the tropics and subtropics agro-climatic conditions (Flack-Prain, 2021). About 55 diseases caused by fungi, bacteria, viruses, phytoplasmas, and nematodes reported from India (Kumar et al., 2020). Among the major diseases, Yellow Leaf Disease (YLD) is a rising threat to sugarcane cultivation in India, previously known as Yellow Leaf Syndrome (YLS), was initially discovered in Hamakua (Hawaii) in variety H65-7052 in 1989 and since then it has spread to over 30 nations (Viswanathan 2016). Yellow Leaf Disease (YLD) was first identified in India in 1999, and by the following year, it had spread across the country, with 100% YLD incidence in susceptible cultivars. Sugarcane yellow Leaf Virus infection have been reported to reduce plant growth by 42.2, 42.9, and 38.9% in susceptible cultivars Co 86032, CoPant 84211, and CoC 671 respectively, in India (Chinnaraja and Vishwanathan, 2015). Sugarcane Yellow Leaf Virus belongs to the genera Polerovirus in the family Luteoviridae Aphids (Melanophi ssacchari, Rhapalosiphum maidis, R. rufiabdominalis) are the main vectors of the pathogen. (Mollov et al., 2021). Temperature, relative humidity, sunshine hours, and rainfall all play a crucial role in the initiation and progression of plant disease over time (Bana et al., 2020). The study of disease development due to a combination of climatic factors could be useful in monitoring and assessing the occurrence of plant disease epidemics in nature for quantification and forecast of crop losses, as well as developing disease management techniques (Garain et al., 2021).

Influence of Weather, Vector and Variety on Incidence of Yellow Leaf Disease in Sugarcane

“…According to Jeena et.al. [14] and Mandal et.al. [20] yellow leaf disease of sugarcane expressed significantly positive correlation with minimum temperature and relative humidity.…”

“…Aphids YLD cent) was observed during 49 SMW and 2 SMW which is in consensus with the findings of Jeena et.al. [14] and Mubeen et.al. [15], who found that high incidence of yellow leaf disease was observed in December and January.…”

Influence of weather parameters on rice false smut disease progression in Tamil Nadu, India

“…The disease severity was positively correlated with relative humidity, wind speed and bright sunshine hours at 0.88, 0.97 and 0.60 respectively. Additionally, many researchers have found a positive relationship between high relative humidity and false smut disease development (Pal et al, 2017;Jeena et al, 2022). Earlier studies showed that BSS in association with optimum RH (70-80%) encouraged good crop growth as well as rice false smut disease development (Sandhu et al, 2017).…”