The resistance of some rice varieties to green leafhopper and penyakit merah virus

H. Habibudin. O. Othman. AND A. Saad

Abstract

The resistance of some IRRI (IR) and advance Malaysian Rice (MR) varieties against Nephotettix virescens and PMV was investigated using GLH culture from Bumbong Lima. Seberang Perai. There is a strong correlation (r = -0.7629**) between vector resistance and susceptibility to PMV infection under forced inoculation tests. The degree of variability is more pronounced in IR compared with MR varieties tested. Even though the differences in resistance were not noticed amongst MR varieties under laboratory tests. variation could be detected under natural field infestation where MR 77 and MR 78 were found to be less infected. There was a difference in biotype between IRRI and Malaysian cultures of GLH. Rice variety IR42 was more resistant to Malaysian GLH compared with IR28. the reverse was true against the IRRI culture.

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