Papaya ringspot virus (PRSV) belongs to the genus Potyvirus, a large and economically important group of plant infecting viruses in the family Potyviridae. PRSV is transmitted in fields by aphids. Insecticide application is not effective for disease control. The most effective and economic management strategy would be through the use of a disease-resistant cultivar. CucCAP’s watermelon breeding team has identified germplasm with resistance to PRSV. For more information about disease management of PRSV visit the California IPM program’s UC Pest Management guidelines published in 2017.