Cultivation and collection

Example of plants affecting by the collection season is:

• Digitalis

• Rhubarb

• Solanaceaous leaves

Time of the day would affect the composition of

• Cardia glycosides

• Anthraquinone in Rhubarb

• Alkaloid in colchicum

The relative percentage of active constituents vary according to the stage of maturity in the following:

• Digitalis leaves

• Clove

• Rhubarb

Example of crude drugs exposed to decortication:

• Vanilla

• Tea

• Cinnamon

Curing process is very essential in:

• Tea

• Cinnamon

• Ginger