Parker neem oil(ws) parker neem oil is one of the highest grade pure neem oils for personal use available today. It contains at least 1600 ppm azadirachtin. The oil is cold pressed and extracted from neem seeds without heat, chemicals, petrochemicals and retains all the well balanced nutrients in the oil - many which would otherwise be lost. It is non toxic to humans, birds, earthworms or animals. As a preventative neem is mainly used when problems are just starting to show. What is does is to coat the leaf surface which in turn prevents the germination of the fungal spores. Neem is effective against rots, mildews, rusts, scab, leafspot and blights. It works as a barrier not as a fungicide. It makes a great garden spray as a general tonic for your plants and soil. Earthworm populations have been showed to increase with the use of neem as a tonic.