(Survey of seed-borne viruses in lentil in Syria and their effects on lentil yield)
1993
Kumari, S.G. | Makkouk, K.M. | Ismail, I.D.
A total of 161 lentil fields in the northern, southern, central, northeastern and coastal regions of Syria were surveyed during 1990/91, 1991/92 and 1992/93 cropping seasons to determine the presence of seed-borne viruses. Two hundreds lentil seedlings were collected from each field, and were divided into groups of 25 seedlings each. ELISA tests revealed the presence of pea seed-borne mosaic virus (PSbM) in 0.6 of samples collected from southern grovernorates only. Broad bean stain virus (BBSV) was detected in 56/161 fields: 10/30, 15/52, 5/31, 24/29 and 2/10 with disease incidence of 0.49, 0.63, 0.42, 3.35 and 0.37 in northern, southern, central, northeastern and coastal regions, respectively. Infection with BBSV at pre-flowering, flowering and post flowering (podding) stages led to a yield loss of 24,31 and 25 and seed transmission rates of 20.57, 19.11 and 1.50 respectively. Like-wise, infection with PSbMV at the above three growth stages led to a yield loss of 28, 27 and 23 and seed transmission rates of 2.21, 1.50 and 0.41 respectively
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