azadirachtin

Some insecticides that are relatively non-toxic to bees include natural products such as azadirachtin, which is derived from neem oil; Bacillus thuringiensis (B.t.), which controls caterpillars; and pyrethrum and rotenone, both of which are derived from plants.

Local News from Wilmington Star News By Charlotte Glen 2010

· homogenous quality (do not vary much from batch to batch) · higher concentration of azadirachtin, which is required to control certain pests

2. Survey of neem-processing methods 2000

After recovery of the solvents a powder extract remains with an azadirachtin content of up to 20%.

2. Survey of neem-processing methods 2000

Considering the solubility of the leading component azadirachtin, it is clear that only polar solvents should be used for extraction.

2. Survey of neem-processing methods 2000

A higher moisture content will lead to fungal contamination and subsequently to a reduced azadirachtin content.

2. Survey of neem-processing methods 2000

Still, the cold pressed neem oil could contain up to 0.6% azadirachtin A. Water and alcohol are the best solvents.

2. Survey of neem-processing methods 2000

In a further extraction step it can be used to gain azadirachtin.

2. Survey of neem-processing methods 2000

The products contain between 0.3 and 1% azadirachtin A as well as many teranortriterpenoides and other substances (residual fat, sugar etc.).

2. Survey of neem-processing methods 2000

In a pilot plant a powder containing 15% azadirachtin has been gained from the cake.

2. Survey of neem-processing methods 2000

After depulping, the seeds have to be washed in water, dried for 4 - 5 hours in the sun and then moved to the shade, if the sun is strong enough to risk lowering the azadirachtin content of the kernels.

2. Survey of neem-processing methods 2000