Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 7/25/2006
Publication Date: 9/17/2006
Citation: Sisterson, M.S., Groves, R.L., Son, Y., Johnson, M., Lynn, K., Daane, K., Hill, B. 2006. Modeling Glassy-winged Sharpshooter Phenology and Pierce's Disease Incidence [abstract].VIIIth European Congress of Entomology Abstract Book. p. 28
Technical Abstract: Insect, plant, and bacterial growth are all regulated by environmental factors, such as temperature. Consequently, climate plays an important role in the: 1) ability of glassy winged sharpshooter (GWSS) to survive the winter, 2) development of GWSS populations throughout the year, and 3) propensity for infected plants to be cured of infection by pruning or cool winter temperatures. By understanding the effects of climate on these processes, we can better define which vineyards are at risk for infestation by GWSS, when large populations of inoculative GWSS are likely to be present, and what time of year inoculations will result in chronic infection. To answer these questions we are using a combination of empirical research and modeling. To determine the areas of California where GWSS can survive the winter, GWSS overwintering temperature requirements are being determined to develop a degree-day cooling model. By using the degree-day cooling model and historical temperature records, we can define the areas where GWSS can and cannot successfully overwinter. In conjunction, we are using simulation modeling to better define the window of opportunity for GWSS to invade vineyards and inoculate grapes in a manner which produces chronic infection (i.e., an infection that cannot be cured by pruning or cool winter temperatures). This information should help to focus control efforts to the parts of California where GWSS establishment is likely and will indicate the best time of year to implement control measures to prevent the spread of Xylella fastidiosa.