SPATIAL AND TEMPORAL RELATIONS BETWEEN GLASSY-WINGED SHARPSHOOTER SURVIVAL AND MOVEMENT, XYLEM FLUX PATTERNS, AND XYLEM CHEMISTRY IN DIFFERENT HOST PLANTS

• Author(s): Hoddle, Mark; Luck, Robert; Andersen, Peter; Coviella, Carlos;
• Abstract: We use weekly whole tree samplings on commercial size citrus trees to quantify actual GWSS population densities and to follow its population dynamics. The dataset presented includes data taken from oranges and lemons, and we recently started the same sampling on tangerines and grapefruit. The results for the whole period from October 2001 through September 2001 show no significant difference between oranges and lemons. However there are significant differences at different times of the year. There is also a clear decline in population density from the averages detected in 2001/2 and the averages for 2003. We will continue sampling through at least 2004 to assess whether this trend continues. At the moment of this report, the results from the xylem chemistry 2002 dataset as well as the recruitment of nymphs and adults for 2003 are being processed, and will be shown at the meeting.
• Publication Date: Aug 2003
• Journal: 2003 Pierce's Disease Research Symposium