The disease in papaya is caused by the type p strain of
PRSV (Purcifill et al. 1984). Typical symptoms of PRSV
include mosaic and distorted leaves, stunted trees, drastically
reduced fruit yield, and small fruits with ringspotting
blemishes (Purcifull et al. 1984). Symptom expression is
highly influenced by environmental conditions. Symptoms
are more severely expressed during cooler months (Gonsalves
and Ishii 1980).