Continuation of diagnostic service for growers for detection of Huanglongbing in citrus and psyllids to aid in management decisions

Continuation of diagnostic service for growers for detection of Huanglongbing in citrus and psyllids to aid in management decisions

Report Date: 09/30/2016
Project: 15-034C   Year: 2016
Category: CLas Bacteria
Author: Pamela Roberts
Sponsor: Citrus Research and Development Foundation

The Huanglongbing Diagnostic Lab at UF-IFAS-SWFREC has now been in operation for 8 years. As of September 2016, we have processed more than 40,850 grower samples. For the 2016 calendar year to date, we’ve received 3,531 samples from growers, which is on track for a calendar year total exceeding 2015 levels. The 3,995 growers samples processed during 2015 represented a 46% increase in the number of grower’s samples over the previous calendar year, which in itself had seen a 37% increase over 2013 numbers. These increases are likely due to the increased efforts to mitigate the HLB-associated tree stresses. Growers in this area, and most other regions, currently have one or more HLB mitigation program that they are evaluating. These growers are using the HLB lab to evaluate the effectiveness of their efforts. Another evidence of increased grower usage of the lab is seen in the fact that 60% of the individuals who submitted samples during 2015 were new clients who had not previously submitted samples. So far, new clients comprise 54% of submitters in 2016. Additionally, more than 44,100 samples have been received for research for the entire period of diagnostic service, supported by grant funding of individual researchers. This brings the grand total to more than 85,000 plant samples processed. Grower samples are typically processed and reports returned within a two to four week time period. For this report, focusing on the quarter from July through September 2016, there were 306 growers samples processed in addition to research samples and psyllids. The HLB Diagnostic Lab continues to offer the service of detection of CLas in psyllids as funded in this grant. Current methods of sample processing have become streamlined and therefore seen no change in procedure.


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