Blackberry (Rubus) is a thicket-forming perennial shrub. It can grow up to 9 feet tall with stout, arching canes covered in broad-based thorns. Canes can be up to 40 feet long. Plants have a large, deep woody root crown with thick lateral roots. While leaf shape can vary species to species, blackberry leaves are primarily evergreen with rounded and toothed edges. Flowers are small, white to pinkish in color with five petals.
Blackberry is well adapted to growing in grasslands and open, disturbed areas – making pastures a prime target. Once established, blackberry can restrict movement of livestock and wildlife, while reducing desirable plant productivity. Because there are over 20 species of blackberry in North America, finding blackberry is common throughout most of the United States.
Blackberries are difficult to control since plants are capable of regenerating from the root crown or rhizomes. Acceptable results are possible but may require multiple applications and/or tactics. Treat blackberry infestations with 16 fluid ounces of DuraCor™ herbicide tankmixed with 16 fluid ounces PastureGard and 0.25% nonionic surfactant per acre. For nonresidual weed control, apply 2 pints per acre of PastureGard® HL herbicide. Foliar applications provide the best control after fruit has dropped in late summer.
Label precautions apply to forage treated with DuraCor and to manure and urine from animals that have consumed treated forage. Consult the label for full details.
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