Overview
The broadleaf weeds from this family can be difficult to distinguish between one another; therefore it is important to correctly identify the problem species, as they react to varying herbicides differently. Black nightshade is not typically seen as a strong competitor in regards to large seed crops; however, when found in higher densities, its ability to reduce crop yield is significant. Furthermore, the green, immature berries are poisonous.
Main description
Seedling
The cotyledon of Black Nightshade ranges from 4-10 cm in length and are lanceolate in shape. The leaves have very small hairs that are transparent and difficult to see. The stem has longer hairs that are not transparent, which aid in its identification. The cotyledon is dark green in colour and fairly easy to distinguish from other species.
Mature plant
The distinguishing features of Black Nightshade are erect stems with a high level of branching in the upper portion of the mature plant. The stems and leafs of this broadleaf are smooth, usually hairless, almost translucent and grow in alternate fashion, with leaves up to 7 cm long. At maturity, white flowers will be present at the end of short stalks in groups of 2-5, which will also produce green berries – toxic to humans and most animals.
Optimal growth conditions
The broadleaf weed Solanum ptychanthum is a very adaptable plant that does well in direct or non-direct sun light. It grows well in varying soil conditions but prefers fertile loam.
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