Abstract
A breakthrough has been made in clonal propagation of Quercus griffithii Hook. & Thom. ex Miq. through air layering. IBA and NAA the two root inducing hormones were used during May and July in 1998 and during June in 1999 and 2000 in three doses of 250, 500 and 750 ppm for raising air layers. IBA 250 and NAA 500 ppm was found to be the best dose for induction of rootimg (73.33 – 75.0%) followed by IBA 250, NAA 500 and NAA 750 ppm doses which induced as high as 62.5, 50.0 and 40.0 per cent rooting, respectively. The most suitable season for raising air layers has been found to fall during June- July. As Q. griffithii is a hilly plant, air layerings transplanted in low lying (water logging) areas in Imphal Valley failed to survive. Hence care should be taken to transplant well rooted air layerings in sloppy areas only.
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