Weeds-Silver-leaf Nightshade

SILVER-LEAF NIGHTSHADE Back

Silver-leaf nightshade is a perennial that spreads by root and seed. It is a branched perennial with a somewhat prickly stem and ovate, sometimes lobed leaf. The leaves have a felt-like gray appearance. It has a network of deep, lateral roots that allow dense patches to form. This weed can grow in a wide range of environmental conditions. It is primarily a weed of agronomic crops, pastures, hay fields, and roadsides. All parts of the plant are capable of forming shoot buds. The fruit is a source of solasodine used in the production of steroid hormones. Species within the genus Solanum are known to accumulate excess nitrates in soils high in nitrogen. Vehicles and machinery should be thoroughly cleaned after leaving an infested area.

Control

Cultural: Competitive pastures or other desirable vegetation can suppress the growth of Silver-leaf nightshade.
Mechanical: Cultivation is not an effective control method because of the weed's deep root system. Cultivation will generally increase the size of the infestation. Grubbing can prevent flowering and seed formation but will not provide long-term control.
Biological: All parts of the plant, particularly the berries and foliage are toxic to animals. Cattle are more susceptible than sheep, while goats are not affected. There are no insects available for this weed.
Chemical: The herbicide picloram has proven most effective for control in rangelands, pastures and other non-crop areas. Picloram is a "Restricted Use" product that can only be applied by a licensed applicator. There are other selective herbicides available, however, repeated applications may be necessary.

When choosing any kind of control method, assure that your choice is suited for your particular situation. Always read and follow the product label before applying any herbicide.