|Chikowski, Rebecca - OREGON STATE UNIVERSITY|
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: June 1, 2003
Publication Date: October 27, 2003
Citation: Fisher, J.R., Albrecht, M.A., Chikowski, R.L. 2003. Life tables of grape phylloxera: effects of variable temperature regimes on a population from washington, oregon, and california. Meeting Abstract. Technical Abstract: Grape phylloxera, Daktulosphaira vitifoliae Fitch (Homoptera: Phylloxeridae), a multivoltine pest, continues to be a threat to wine grape (Vitis vinifera L.) growers in the Pacific Northwest of North America. Since damage was found in 3 vineyards in 1990, Oregon now has more than 70 vineyards affected. Washington has had as many as 8 vineyards infested over the past 40 years but only 3 remain. In a previous study we had found that life processes were affected adversely when phylloxera were reared at constant temperatures > 30º C and < 18º C. In this study we compared the development of 3 phylloxera populations (1 each from Oregon, Washington and California) under variable temperature regimes simulated from a selected location in each state. Generations varied by origin of population and by temperature regime. Longevity of adults as well as egg production increased with early summer temperatures while late summer temperatures cause a great reduction in life parameters in all regimes.