84.9% Cold Pressed Neem Oil. TerraNeem EC is a concentrated, unrefined neem oil and is highly effective against a wide range of pests and diseases. TerraNeem EC is an excellent multi-purpose material that can be used to prevent diseases and repel or eliminate pests. Cold pressing of the neem keeps the full spectrum of active compounds (including 0.4% azadirachtin) intact and working in synergy.