RT Journal Article
SR Electronic
T1 Interaction of Phylloxera (<em>Daktulosphaira vitifoliae</em> <span class="sc">Fitch</span>) with Grape (<em>Vitis</em> spp.) in Simple Isolation Chambers
JF American Journal of Enology and Viticulture
JO Am J Enol Vitic.
FD American Society for Enology and Viticulture
SP 28
OP 34
DO 10.5344/ajev.2001.52.1.28
VO 52
IS 1
A1 Astrid Forneck
A1 M. Andrew Walker
A1 Rolf Blaich
A1 Michel Yvon
A1 Francois Leclant
YR 2001
UL http://www.ajevonline.org/content/52/1/28.abstract
AB A greenhouse-based system to evaluate Daktulosphaira vitifoliae (Fitch) performance on various host plants was modified. Two parthenogenetic generations could be continuously observed and the numbers of reproductive adults and feeding sites (nodosities) determined. Phylloxera performance could be separated into three types. The standard type produced increased numbers of reproducing adults within the first two generations. The second type performed significantly better in the colonizing generation (G1) than the standard type, but had declining reproduction in the second generation (G2). The third type exhibited standard reproduction in G1, but significantly faster and higher reproduction in G2. The isolation chambers were built from 2 L clear plastic water bottles with fine silk-screen tops. These chambers produce quarantine conditions for phylloxera populations, allow continuous monitoring, produce rapid results, and allow inexpensive study of phylloxera performance on selected host plants. Furthermore, the chambers provide the isolation necessary to maintain and rear single-founder phylloxera lines under laboratory conditions.Acknowledgments: We thank Ms. E. J. Frantz for her valuable assistance and Prof. J. Granett (University of California, Davis) for supplying biotype A phylloxera samples. We are grateful for financial assistance provided by the German Research Society (DFG), the California Grape Rootstock Improvement Commission, the California Table Grape Commission, the American Vineyard Foundation, and scholarships provided by the Bundesland Baden-Würtemberg and the German Academic Exchange Service (DAAD).