French Broom (Genista Monspessulana) Technical Report Essay example

765 Words Mar 23rd, 2015 4 Pages
French Broom (Genista Monspessulana) Technical Report

Genista Monspessulana, commonly known as French Broom, is a Class A weed located on the western coast of the United States. Its appearance is that of a large shrub with yellow, pea-like flowers and small oval leaves in groups of three. It is commonly under 3 meters tall. Its stems are erect, dense, and green or brown densely covered with silky, silvery hairs (U.S.F.S. 2014). It is typically leafy with leaflets ranging from 10mm to 20 mm long and petioles about 5 mm long(U.S.F.S. 2014). There are normally 4 to 10 pea-like flowers about 5mm to 7 mm long on axillary pedicels 1mm to 3 mm long (U.S.F.S. 2014). The fruit is a legume ranging from 15mm to 25 mm long and 5 mm wide with 3 to 8
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2014).
French broom can invade a wide range of habitats including roadsides, fields, logged areas, bluffs, coastal areas and French Broom is well-adapted to open, sunny, and well-drained sites. French broom can alter the nitrogen level in soil and thereby disrupt low-nutrient ecosystems such as the Puget Sound prairies here in Washington (King County 2014). French broom can also interfere with re-forestation and can aid the spread of wildfires (King County 2014). French broom plants can survive cutting and tend to re-sprout from the crown when cut or burned (King County 2014). Seeds are produced in hard, dry legume pods that burst open when mature and are generally dispersed close to the parent plant unless soil is moved through erosion, flooding, man-made machines, or other means such as animals grabbing and moving them (King County 2014). French broom seeds are hard and long-lived and the plant can produce over 8000 seeds a year (King County 2014). High seed production and long-lived seeds make eradication of established populations very difficult.
For controlling the growth and spread of French Broom, cutting and burning alone have proven to be unsuccessful. However, these approaches combined with the use of an herbicide has proven to yield favorable results. These methods include cutting them from the ground and spraying their stems with herbicide to prevent regeneration (U.S.F.S. 2014). Also, for

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