author(s)
Pushpa RN, Nagaraju N, Sunil Joshi and Jagadish KS

abstract
Papaya ringspot virus-P (PRSV-P) disease is a most destructive and devastating disease of Papaya (Carica papaya Linn.). All the growth stages of papaya are vulnerable to PRSV infection. PRSV is style borne and transmitted by many species of aphid vectors in a non-persistent manner and spreads rapidly in the field. Monitoring of transitory aphids using yellow sticky traps in papaya orchard revealed, trapping of eight major aphid species viz., melon or cotton aphid (Aphis gossypii), cowpea aphid (Aphis craccivora), milkweed aphid (Aphis nerii), bamboo aphid (Astegopteryx bambusae), green peach aphid (Myzus persicae), eupatorium aphid (Hyperomyzus carduellinus), cabbage aphid (Brevicoryne brassicae) and banana aphid (Pentalonia nigronervosa). The number of efficient vectors decides the epidemiology of PRSV incidence. Hence, a very high incidence of PRSV was observed between 14th and 23rd week after transplantation which was coincided with increased aphid population. The aphid population was peak with rainfall of below 8.00mm, maximum temperature of 28-350C, minimum temperature of 17-230C, maximum and minimum relative humidity range of 60-90% and 30-50% respectively.