Abstract: Infection caused by both Faba bean necrotic yellows virus (FBNYV) and mosaiccausing viruses were inspected during Oct. 2003 to Apr. 2004 on broad bean fields grown in Qualubia. Population density of seven different aphid species on broad bean was arranged descendingly as follow: Aphis craccivora (270.9), Myzus persicae (89.0), A. faba (52.5), Acyrthosiphon. Pisum (24.3), A. gossypii (4.7), A. sesbaniea (1.8), and A. nerii (0.7). Population fluctuation of previous aphid species was recorded on broad bean and on eleven species of Joining weeds during the same period in the same fields. Increasing-infection rate (11R) of persistent insect-borne virus (FBNYV) is 38.6 times higher than that of nonpersistent insect-borne viruses (mosaic-causing virus infection). Increasing-infection rate fluctuations of both virus-infection types are the same. It starts with low rate and then increasing during season period and declined at the period end. It consists of different infection cycles (4 cycles), Two small ones in the middle of observation period and two big ones at the beginning and at the end of the period are occurred. Generally, IIR fluctuations of both infection types were strong positive correlated and associated with the population fluctuations of aphid insect vectors. However, both virus-infection types are polycyclic disease; persistent insect-borne virus has higher IIR. Slower increasing of IIR in middle of period translates moderate severe infection (43.2%) occurrence that caused by FBNYV in Qualubia. Infection curve studies and IIR analysis as well vectorpopulation fluctuations could help in early viral infection prediction.