Bidens pilosa(Botanical) , Tsine, Mhuwu, Nyamaradza(Shona) , Umhlabangubo(Ndebele)
Black Jack is an annual herbaceous erect weed, which can grow up to 1.5 m tall. It has four sided deep purple stems with dark green opposite leaves and branches. The weed produces black-dark brown linear seeds, yellow barbed awns. Black Jack can usually be seen in all seasons in the tropics but it grows most actively in the warmer and wetter parts of the seasons. It commonly grows in gardens, arable lands and pastures. Under sever infestation, Black Jack reduces soybean yield by 43%. The leaves provide an edible relish which has medicinal properties. Black Jack can also be used to make organic pesticides.
Atrazine 50 SC (Atrazine 50%) - Classified green
Chlorimuron-ethyl WG (Chlorimuron Ethyl 25%) - Classified green
Dicamba 48 SL (Dicamba 480%) - Classified red
Glyphosate 41 SL (Glyphosate 41%) - Classified green
MCPA 40 SL (MCPA 40%) - Classified amber
Bentazone 48 SL (Bentazone 48%) - Classified green