PJB-2023-388
Occurrence and Distribution of Bacterial blight of Clusterbean incited by Xanthomonas axonopodis pv. cyamopsidis in major growing area of Rajasthan.
PRAHLAD
Abstract
Guar, also known as clusterbean, is a member of the Leguminosae (Fabaceae) family. Its genus Cyamopsis contains three species: C. tetragonoloba, C. senenglensis, and C. serrata. The most extensively farmed of these is C. tetragonoloba, followed by the other two. The pathogen that causes leaf blight, Xanthomonas axonopodis pv. cyamopsidis, drastically reduces plant stand and can produce up to 58% less in cultivars. The illness simultaneously manifests as leaf spot and blight. During the Kharif seasons of 2018 and 2019, a roving study carried out in the main clusterbean-growing areas of Rajasthan confirmed the presence of the bacterial blight caused by Xanthomonas axonopodis pv. cyamopsidis. No district or location in the examined districts was totally devoid of the bacterial blight illness. Hanumangarh (30.23%) had the highest disease severity, and Barmer (17.54%) recorded the lowest. Clusterbean was more susceptible to Xanthomonas axonopodis pv. cyamopsidis infection at the maturity stage and 30 days after planting in the months of October and November, when the temperature starts to fall. The state's locations varied in terms of the severity of the sickness as a percentage. Results showed that compared to sprinkler and rainfed environments, illness severity was more frequently found under flood irrigation conditions.
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