Unwanted vegetation

Weeds

Multiple invasive plant species

Unwanted plants that compete with managed vegetation or create operational, access and health concerns.

Included in this category

Parthenium hysterophorus

Photo: Ethel Aardvark · Source · CC BY 3.0

The listed weeds range from low creeping herbs and grasses to tall flowering shrubs. Identification should use leaves, stems and flowers.

Weeds colonise disturbed ground, edges, paving gaps and neglected areas, spreading by seed or vegetative growth.

Plants make their own food by photosynthesis while drawing water and nutrients from soil.

Species spread through seed, runners, rhizomes, fragments or combinations of these methods.

Unwanted growth, rapid regrowth after cutting, seed production and displacement of intended planting.

Dense weeds can obstruct access, harbour pests, damage surfaces and, in some species, cause allergy or skin irritation.

Prevention

Confirm the organism before selecting control measures

Remove food, water and shelter where practical

Seal or manage access points and harbourage

Use monitoring and a site-specific IPM programme

Professional support

Arrange a site-specific assessment with PCAMB.