Porta-enxertos para o cultivar Máximo IAC 138-22 de uvas de vinho em Monte Alegre do Sul, SP

A long term experiment was conducted at Monte Alegre do Sul, State of Sao Paulo, Brazil, to study the behaviour of wine grape cultivar IAC 138-22 Maximo on five rootstocks: RR 101 14, 'Golia', "Riparia do Traviu', IAC 313 and IAC 572 The yields of eight consecutive annual harvests (from 1974 to 1981) were analysed. The results indicated that IAC 572 was the best rootstock. IAC 313 can also be used but with fair results. "Riparia do Traviu', RR 101-14 and 'Golia' are not recommended as rootstocks for IAC 138-22. Considering the row spacing (2 x 1m) which allows 5,000 plants/ha, the difference between average yields of the best and the worst rootstock was 8,475kg/ha of grapes, a considerable figure for the grape grower.