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Cutleaf blackberry

Cutleaf blackberry

Principal distinguishing features

  • sprawling evergreen shrub forms large thickets of trailing to climbing stems
  • stems are heavily ribbed, purplish-red and are usually prickly or bristly
  • leaves are alternate and palmately compound with 3-5 highly lacerated leaflets
  • leaves are green to greenish-red above, paler below and armed with prickles
  • juicy, edible, black berries about 1 inch long are produced in tight clusters

Impacts

· Out competes native vegetation capable of providing shade, coarse woody debris and detritis to riparian areas

· Restricts access by wildlife to water courses, degrades pastures and limits recreational access

 


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Control Strategies

  • biological – N/A
  • chemical – Garlon Ultra, Roundup / Vantage applied in late summer to early fall when sugar movement in the plant is towards the roots
  • mechanical –roots must be dug out by hand or via excavator.  Pull canes out of the ground before they produce berries.  Reduce biomass by mowing a number of times per year. Integration of cutting, chemical treatment of stumps and follow-up herbicide application offer the most success.

Life Cycle: perennial

SSISC priority and location: contain to Squamish and south

Main Vectors of Spread

·    vegetatively by rooting from the cane tips touching the ground or from nodes along the canes

·    birds and mammals that eat the fruit

 
 
 
 

BC Legislation: Forest and Range Practices Act (FRPA) & Community Charter

Rooting Habit

  • extensive system of inter-connected roots can exceed 10 m in length and 1 m in depth

 

Preferred Habitat

  • woodland edges, fense rows and clearings
  • requires full sun and dry soil

 

IAPP Map Symbol: CL

More links:

Centre for invasive species and ecosystem health (US)


 

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