Usage of the oil
use 10 to 30 ml of neem oil for one liter of water (1 to 3 spoons) and 1 to 3 ml of liquid detergent (¼ to 1 teaspoon), and spray the plant for protection. Prepare a new mixture every time before using it.
It controls black spots, protects from fungal infections such as mold and rust (phragmidium mucronatum), Powdery mildew (Oidium), destroys mites, aphids, whiteflies, and has effect on more than 200 species of insects and pests.
The chemical compound Azadirachtin has effect on hormonal system of the insects, including reproduction, feeding and possibility of flying. It also stops the development of the insects during various stages of metamorphosis.
The plants treated by neem oil mixtures block pests (rats, mice, cockroaches…) by its bitter taste. It has been proved that the active components of neem, such as azadirachtin, salannin, and meliantriol have insecticidal effect.
It is easy to recognize it due to its smell which reminds of garlic and has bitter taste. That taste helps eliminate insects which use plants for food. Neem oil was used by Australian shepherds to produce wool without pesticides and with much better quality.