Neem can be applied as a non-toxic insecticide that disrupts the growth of some insects and causes others to avoid eating plant tissues made bitter by the neem.  It is also an excellent full-spectrum fertilizer, replete with minerals.  Added to the soil in ‘cake’ form it repels root feeding pests and grubs. A derivative of Neem, high concentrated chemical is an organic solution having low toxicity to everything, except amphibians.  Application at the right time, frequency, and amount is critical for success.