There is often a mention in literature about variations of Azadirachtin content in
Neem Oil from different countries regions with in country. Extensive variation in the
Azadirachtin content of Neem ecotypes has been reported by Kumar & Parmar (1997)
and others, however high variability could not be attributed to any specific
environmental, edaphic or genetic conditions.
Neem Oil from different countries regions with in country. Extensive variation in the
Azadirachtin content of Neem ecotypes has been reported by Kumar & Parmar (1997)
and others, however high variability could not be attributed to any specific
environmental, edaphic or genetic conditions.
If the hypothesis that environmental conditions such as temperature, humidity,
moisture stress or its abundance would influence Azadirachtin quality is accepted
then all the individuals of a particular locality should have nearly uniform Azadirachtin
content. Accordingly, it should be possible identify good provenances and ecotypes.
In that case, it should be easy to select ideal ecologically defined sites for growing
Neem and predict high Azadirachtin output. However, no such conclusive information
is available in the literature. Large variations in Azadirachtin, salanin and nimbin
content were observed in our studies of Neem from the country under network project
of NOVOD Board, India.
moisture stress or its abundance would influence Azadirachtin quality is accepted
then all the individuals of a particular locality should have nearly uniform Azadirachtin
content. Accordingly, it should be possible identify good provenances and ecotypes.
In that case, it should be easy to select ideal ecologically defined sites for growing
Neem and predict high Azadirachtin output. However, no such conclusive information
is available in the literature. Large variations in Azadirachtin, salanin and nimbin
content were observed in our studies of Neem from the country under network project
of NOVOD Board, India.
Ermel (1995) determined Azadirachtin
content of Neem seed kernels from
various geographic regions of the world
and reported great variability between
samples from different countries.
Venkateswarlu et al. (1997) attributed
these variations in Azadirachtin content
to local environmental conditions such
as humidity, rainfall, temperature or
seasons Sidhu and Behl (1996) in their
study of seasonal (monsoon and
winter) variations in Azadirachtin A, B
and F in Neem seeds. Kumar and
Parmar (1997) also investigated
Azadirachtin content from some Neem
ecotypes of India and reported the
causes for variability in Azadirachtin
content as high rainfall extreme drought
and high humidity.
content of Neem seed kernels from
various geographic regions of the world
and reported great variability between
samples from different countries.
Venkateswarlu et al. (1997) attributed
these variations in Azadirachtin content
to local environmental conditions such
as humidity, rainfall, temperature or
seasons Sidhu and Behl (1996) in their
study of seasonal (monsoon and
winter) variations in Azadirachtin A, B
and F in Neem seeds. Kumar and
Parmar (1997) also investigated
Azadirachtin content from some Neem
ecotypes of India and reported the
causes for variability in Azadirachtin
content as high rainfall extreme drought
and high humidity.
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