Neem Indian lilac, Azadirachta indica A.Juss., synonymous Melia azadirachta  L., M. indica
(A.Juss) Brand; family Meliaceae,
a native of Indian sub-continent, is a highly esteemed tree
for the people in
India.
For centuries its derivatives have found use
in
agriculture, health, medicine, toiletries,
cosmetics and livestock
production. The
tree has been considered so invaluable and
miraculous that it became a major
inseparable component of the Indian
ecosystem. In the countryside, the tree is a
common sight on the roadside, agricultural
fields and residential backyards. It has
already spread to
Australia, Africa, Fiji,
Mauritious, Central and South
America, The
Caribbean, Puerto Rico, The Virgin Island,
Haiti, Plains of Arafat and other places.
From an initial caution and sceptism, Neem
has now been universally accepted as a
wonder tree. The ever new information being
generated on it in the modern format of
science is only confirming the writings
enshrined in the ancient India literacy
classics. Its mammalian safety and
environment friendliness reports are highly
encouraging. Its
bioactivity spectrum against
the harmful organisms is ever increasing.
From a tree for solving the problems of the
underdeveloped third world, it is becoming a
much sought after commodity by the highly
elite nations of the world.
During the last two decades, Neem Oil has attracted the attention of the scientific community
and has attained a pride of place in national and international literature. Encashing on the
earlier records that locust avoided both Melia azedarach and Azadirachta Indica, the Indian
scientist initiated researches to investigate into the active ingredients which contributed to
the repellency character. Sinha reported that the bioactive materials were concentrated in
seed and were extractable in ethanol.  Subsequent researches established that the plant
protection as well as the slow nitrogen release characters of neem were attributable to these
extractable materials. This finding aroused interest among multidisciplinary teams of
scientists representing agronomy, soil, science, entomology,
nematology, pathology and
chemistry.
the recommendations of this seminar, the IARI started ‘Neem Newsletter’ in 1984. It is
presently in the 14th year of its publication.the recommendations of this seminar, the IARI
started ‘Neem Newsletter’ in 1984. It is presently in the 14th year of its publication.