All about TreeAzin and neem
To date in Ontario, the only remedy for trees affected by EAB is a product called TreeAzin, derived from neem tree seeds. Apparently, TreeAzin is the extract of a particular chemical, azadirachtin, which is known to be effective against about 200 insects by interrupting feeding and growth.
This chemical has been registered by Health Canada as a pesticide to the company, BioForest Technologies Inc., which is owned by the Canadian Forest Service.
Because Health Canada issued a number of cease and desist orders a few years ago to people who were selling neem products as a product to combat the red lily leaf beetle, confusion developed over its legality in Canada. Now Health Canada says that neem oil is in itself not a banned product. It can be purchased and sold in Canada but it is not to be commercially used as an insecticide – nor is it to be sold as a leaf shine (no explanation why). The only neem product registered as a pesticide in this country is TreeAzin.
It is sold through professional tree services along with an injection method that introduces the product directly to the xylem system of the tree, where it kills eggs and larvae and systemically enters the leaves to kill the feeding beetle itself.