Grapevine (Vitis vinifera L.) explant shoots indexed for corky-bark an
d rootstocks from healthy LN33 indicator plants were sterilized and ma
intained in vitro. When infected shoot tips were micrografted onto LN3
3 shoots, typical corky-bark symptoms appeared in 8 to 12 weeks. We su
ggest developing this method further to replace the regular, 2-year in
dexing procedure.