Here are a few thoughts that i have on all that i have read above
1. just because you read it on the Internet it is not true.
2. Many of the home remedies do not account for phytotoxicity problems (burning up your
plant foliage or just doing damage to your
plants)
3. Is there data to show they really work, not just anecdotal? often just water will knock insects off of
plants and water can even kill some.
4. do you know how it will impact your
plants long term. Case in point, Ivory has been used a lot for controlling pests but did you know that a study was done comparing Ivory to insecticidal soap? they found that the
plants treated with Ivory produced less tomatoes then those with insecticidal soap treatments.
This is why know what are you doing is sooo important. I am not saying that some of these home remedies do not work but just be smart about what you are doing. Also just because it is homemade does not mean it is not just as toxic to the beneficial insects.
I have put on my website a list of companies that supply organic products for horticulture. I have no financial ties to them. I have been doing several lectures on organics and these are products I have come across.
Organic products for horticulture