Just adding my 2¢ worth here . . .
There is a parisitic wasp release program underway in Gainsville aiming to help control the Asian Citrus Psyllid populations in Florida.
That program is providing free vials to release of the tiny Tamarixia (non-stinging) wasps that feed on ACPs. These wasps predate both the ACP adults and their nymphs by laying eggs in them or simply feeding on the adults ACPs. ACPs are the sole food for this Tamarixia wasp species.
The aim of the program is over time to drastically lower the ACP population that is affecting Florida citrus.
Interested parties may contact Amy Croft at the 'Methods Development & Biological Control
Division of Plant Industry' in Gainsville, FL at [ Amy.Croft@fdacs.gov ]
to inquire about this free Tamarixia release program and details about it including instructions for ordering the wasps.
I released several free vials of these tiny Tamarixia wasps in my yard here in Tampa back in late spring and now no longer notice any ACPs on any of my citrus trees.
OK — HTH
Paul M.
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The wasp release program for backyard citrus will do nothing for trees that are probably already infected with HLB.
Amy Croft sent me a few vials of wasps last Winter. I attached the vials to the foliage in my two small trees. The tiny little critters exited the vials and in a day or two they were gone. The next week or so there were more psyllids.
Assuming the wasps took care of the psyllids in your yard, I suspect they flew away to parts unknown to find another infestation. This immediately left your yard vulnerable to ACP's. What I'm leading to is, what use are the wasps if they just hit and run? UF will need to breed tens of trillions of those wasps for state-wide release if there is any chance such a strategy will work.