Field reaction of IR varieties to rice tungro (RTV)-associated viruses
1988
Muis, A. | Sudjak, M. | Bastian, A. | Sama, S. | Hasanuddin, A. | Cabunagan, R.C. (Maros Research Inst. for Food Crops, South Sulawesi (Indonesia))
IR varieties planted in monthly planting trials in the experimental field at Maros and in the RTV [rice tungro virus] nursery at Lanrang substation, South Sulawesi, were used to assess incidence of rice tungro bacilliform virus (RTBV) and rice tungro spherical virus (RTSV) Aug-Oct 1986. Leaf samples were collected from 10 plants of each variety at 30 and at 45 d after transplanting (DT) and indexed by latex test. RTBV and RTSV incidence varied with month of planting. Regardless of variety virus incidence was higher in plots planted the last wk of Aug. IR58, IR60, IR62, and IR64 had low or no RTBV + RTSV infection. In the Lanrang RTV nursery, RTV incidence was high even at 30 DT. IR50, IR52, IR54, IR58, and IR60 had high infection with RTBV + RTSV. These results indicate that GLH-resistant varieties IR50, IR52, IR54, IR56, IR58, IR60, IR62, and IR64 can be attacked by RTV in South Sulawesi. Moderately resistant IR20 and IR26 were infected with RTBV only.
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