Do you know for a fact that neem oil does not harm bees? I find it much stronger and longer lasting than lower strength piratroides.
Peter
Neem does not work on the nervous system as other insecticides do, it works more as a repellent, most bugs would rather starve than eat leaves with neem on them.
in other words, its does not kill bugs on contact, the "oil" part I guess would work like any other organic oil, in that it will suffocate small bugs etc. my problem with Neem oil, is, its seems to lose effectiveness over time ( product goes bad ). not sure if commercially made products have some kind of preservative in them in the US. Neem oil over here is just pressed and bottled.
On this subject, I have been trying to get my hands on a
matrine based product, to test for effectiveness. which is an extract from Sophora alopecuroids, this has been getting a lot of attention lately for medicinal purposes in humans. unlike Neem, this stuff kills insects much like commercial pesticides do gets into their nervous systems and kills them dead. . but is considered "safe" biological alternative and not harmful to beneficial insects. . oxymatrine is used shows promise for Cancer, Asthma, and Hepatitis. matrine is what is used for agriculture.
Anyone have experience with this compound ? . I will eventually buy this, just need to take the drive to the agri-center that has it. hehe.