 There are many strains of curly top virus.They are CA/Logan = California/Logan, CO = Colorado, Kim1 = Kimberly1, LH71 = Leafhopper 71, Mld = Mild, PeCT = Pepper curly top, PeYD = Pepper yellow dwarf, Svr = Severe (formerly CFH), SvrPep = Severe pepper, SpCT = Spinach curly top, and Wor = Worland.The genome of curtoviruses consists of a single circular ssDNA component of 2.9–3.0 kb, encoding six to seven proteins.