42 respectively in treatment T1, T2 and T3 Black nightshade and castor which showed that in treatment levels in the same concentrations second harvest has a more significant role in absorption of cadmium than the first harvest.
Black Nightshade high transmission coefficient can be attributed to its root hairs and consequently to more root discharge.
Toxicologists say that black nightshade, Solanum nigrum, contains several glycoalkaloids, which depress the central nervous system.
A literature search revealed that the Rappanhannock Indians once used the leaves of the black nightshade to treat insomnia.
While Duchon's apparent reaction to the plant -- and the Hmong's apparent lack of a reaction -- remains unexplained, she advises against trying black nightshade as a spinach substitute or sleeping pill.