ABSTRACT
After some considerations about the present phylloxera risks for Italian viticulture, the author gives an account of a remarkable infestation on the leaves of ungrafted vines (commonly called “French vines”) in a vineyard near Florence. Data concerning 4 years old plants were recorded in 1984 and 1985. The first galls appeared at the end of May only in a very small percentage (1%) of plants, but a strong attack (72%) occurred at the end of July. In 1984, despite of the heavy foliage damage, only a weak infestation in the roots was noted and no winged migrant female was captured. On the contrary, in 1985, a good number of winged migrants was present from the middle of august.
Although further investigations are in progress, the preliminary results obtained seem to indicate that infestation does not appreciably affect production.
