Organic pesticides are those made from naturally occurring organic chemicals. Organic pesticides can allow farmers to control pest and diseases in plants without resorting to conventional pesticides. This does not necessarily mean that they are safer to use. Organic presticides can be as damaging to the environment as conventional ones.
Rotenone is an odorless chemical that is used as a broad-spectrum insecticide, piscicide, and pesticide. It occurs naturally in the roots and stems of several plants such as the jicama vine plant. In mammals, including humans, it is linked to the development of Parkinson's disease.
Azadirachtin (the primary active pesticidal ingredient in neem oil) was approved as a pesticide showed that when neem leaves were fed to male albino rats for 11 weeks, 100% (reversible) infertility resulted. Neem oil and other neem products such as neem leaves and neem tea should not be consumed by pregnant women, women trying to conceive, or children. There is some evidence that heavy use may be associated with liver damage in children.
Alcohol spray is ideal for houseplants. Use 1 to 2 cups 70% isopropyl alcohol (rubbing alcohol) per quart of water. Since alcohol can burn the leaves of some plants, test a few leaves of your plant before applying all over. Test results will show in 2 to 3 days.