http://www.nrs.fs.fed.us/disturbance/in ... l_control/Initially, we focused our research effort on the population biology of EAB infesting F. pennsylvanica, planted in a park in Jilin province, where the two new EAB parasitoids, O. agrili and T. planipennisi, overlap in distribution. We estimated that combined parasitism by these two natural enemies resulted in 74% population reduction of EAB at this site in 2005. The F. pennsylvanica trees, although infested with EAB since they were planted about 30 years ago, remain live and produce seeds.
http://entomologytoday.org/2013/06/07/c ... ash-borer/In an article appearing in the June issue of the Journal of Economic Entomology called “Establishment and Abundance of Tetrastichus planipennisi (Hymenoptera: Eulophidae) in Michigan: Potential for Success in Classical Biocontrol of the Invasive Emerald Ash Borer (Coleoptera: Buprestidae),” the authors observed one of the species, Tetrastichus planipennisi Yang, and found that the populations of these parasitoid wasps have been increasing and expanding in Michigan, which suggests that they will likely play a critical role in suppressing the EAB in that state. These tiny wasps, which do not sting humans, lay eggs into or on the EAB larvae. The researchers sampled trees for wasp broods at six forest sites near Lansing, Michigan. By the fall of 2012, the proportion of sampled trees with one or more broods of T. planipennisi increased from 33% to 92% in the plots where the wasps were released. Similarly, the rates of parasitism on the EAB increased from 1.2% in the first year after the parasitoid releases to 21.2%.
The USDA is running a release program from these parasites.. for uh those of you who still have ash trees:
http://www.emeraldashborer.info/documen ... elines.pdfIn January 2009, a Biological Control Production Facility became operational in Brighton, MI. As of February 2013, this facility has reared and released over 720,000 EAB parasitoids in fourteen states. These releases will continue while scientists continue to study the establishment, dispersal, and impact these natural enemies have on suppressing EAB populations and the recovery of ash trees. Scientists will also continue to explore the U.S. and Asia for additional EAB natural enemies for possible use in the EAB biological control program. Most recently, a new species of Spathius was discovered attacking EAB larvae in Korea and Russia, where the climate is different than in Tianjin, China, where S. agrili was collected. Host specificity testing is complete for Spathius galinae, and an application for a release permit has been submitted.
The page where I found these links: