Bubblemang
The specific compounds that I'm interested in isolating are the triterpenes (limonoids) found in the neem tree, i.e. leaves, bark, root, seeds, seed husk, etc.
Besides Azadirachtin (including deacetylazadirachtinol) there is salannin, meliantriol, and nimbin (nimbidin) which provide another range of uses agains certain viruses like potato virus X, vaccinia virus, et al.
I received an answer to an email I sent to the Parker Group which controls much of the neem exports to North America and Europe. Using alcohol you can expect to end up with 2% nimbin levels using neem seeds which are easily sourced.
I'm glad you liked the neem emulsion and wanted to add something about karanja seed oil. Karanja oil has about 1/3 the viscosity of
neem oil making emulsifying easier and quicker. It also has about 10% of the smell and some people might like that.
If you have fresh lavender flowers give this a shot. Get 2 cups of fresh lavender flowers and put into a food processor with an equal amount of water. Puree.
Add this to a container and fill with water until you get about 1.5 gallons. Let this sit for 36 hours or so. Strain to remove the plant material and cap.
When mixing either the neem or karanja oil for sparaying, add 1/4 cup of the lavender tea to the water that you'll be mixing the emulsified oil(s) in. Everything else remains the same (surfactant, silica, etc.)
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