Abstract: In this study, laboratory bioassays were carried out for rapid initial evaluation on the resistance of 10 grape rootstocks and 18 cultivars to Chinese biotypes of grape phylloxera, Daktulosphaira viticola (Fitch). The survival ratio, developmental duration, egg number and index for population age constitution were evaluated. The results showed that rootstocks including SO4, 5BB, 1103P, 420A, Lot, 101-14MG, 3309C, 140Ru and 110R were resistant to phylloxera. On highly resistant rootstocks SO4, 5BB, 1103P and 420A, the development of phylloxera arrested at the very early stage. Beta frequently used as rootstock in China was susceptible to phylloxera. Phylloxera survived at 38.82%～47.5% and produced 9.01 eggs per day on Beta, while the corresponding values were 25%～30% on concord and compbell and 6.00～6.85 eggs per day on concord, campbell and catawba. Both Hei Huxiang and White Banana of Vitis vinifera-V. amerancain were susceptible to phylloxera, on which phylloxera yielded more than 190 eggs totally despite their survival was down\|regulated and development arrested to some extent. All V. vinifera and cross cultivars of V. vinifera -V. amerancain tested were highly susceptible, on which phylloxera survival rate  remained 40%～60% in 29 days after inoculation, and relatively stable thereafter. In parallel, phylloxera produced 7～12.35 eggs per day and summed up to the total of 190 eggs. It was concluded that all cultivars tested were susceptible to grape phylloxera, and thus resistant rootstocks were necessary in the phylloxera epidemic region.

Key words: Grape phylloxera, grape cultivars, rootstocks, resistance