Incidence and detection of cucurbit mosaic disease in Assam

The cucurbits belong to the family Cucurbitaceous (gourd family) under order Cucurbit ales which include many economically important vegetable and fruit species. Among various factors, viruses are one of factors reducing in quantity as well quality cucurbits. These crops severely affected by cucurbit mosaic disease worldwide, is major viral Considering importance disease, present investigation was taken up for incidence, detection, host range study characterization associated with Assam. Survey conducted 5 districts Assam (Sonitpur, Biswanath, Jorhat, Sivasagar, Dibrugarh) during 2021-22. Symptomatology revealed presence symptoms surveyed areas. five locations, observed Sonitpur district were severe, whereas Biswanath moderate mild Dibrugarh districts. Vector incidence showed that aphid predominant vector. Molecular assay confirmed Cucumber Mosaic Virus collected samples areas; severe (90.91%), (66.67%), Jorhat (14.29%), Sivasagar (11%) (25%) virus isolate from Assam, done through partial sequencing similarity analysis 90.94 94.74 per cent sequence homology different worldwide isolates virus.