Birch Leafminer
How do find a supplier of parasitic wasps for birchleaf miner control? From Mississauga, Ontario
The Birch leafminer query – Of the two species of parasitic wasps (Lathrolestes nigricollis and Grypocentrus albipes) introduced for control of the birch leafminer, only L. nigricollis has become widely established. At the level of individual release sites, L. nigricollis has lowered pest density from 50 to <5% of first generation leaves being mined. (Click here.) These wasps were introduced into parts of Quebec and Newfoundland in the 1960s and 1970s and parts of Alberta in the 1990s; Click here for full details. I do not believe that these wasps can be provided to individual homeowners.
1 comment
Mac Jones
Hi.
I was the guy who released Grypocentrus allies and Priopoda nigricollis ,in an attempt to biologically control the Birch Leafminer. This was in Pasadena, Newfoundland ,in 1973.
I would be very interested to know of any success. I am now in UK and discover that the Forest Research Department no longer functions in Nfld. A. Asked co-authored a couple of articles on this.
Hoping to hear from you.
Mac Jones M.Sc.