What is an environmental weed?

Environmental weeds are introduced plants that have naturalised and invaded our bushland, beaches and waterways, threatening our natural environment.

Many environmental weeds were originally introduced and grown as ornamental garden plants. Most environmental weeds are not native to Australia, but some native plants have also become environmental weeds after spreading outside their natural range.

Weeds are usually very hardy plants. They may grow very quickly, reproduce in large amounts and are often tolerant to a wide range of conditions. It is these qualities that make weeds so successful and also make them difficult to control. Weeds commonly thrive where there has been a disturbance to the natural system such as changes in light, nutrients, soil or hydrology. The spread of weeds can be due to animals, wind, water and human activities.

Lethal Weed Control on the Gold Coast

Coastal Morning Glory

Ground weeds

  • Broad Leaf Pepper Tree
  • Camphor Laurel
  • Castor Oil
  • Cats Claw Creeper
  • Coastal Morning Glory
  • Easter Cassia
  • Ground Asparagus
  • Giant Devil’s Fig
  • Lantana
  • Madeira Vine
  • Ochna/Mickey Mouse Bush
  • Singapore Daisy

Water weeds

  • Alligator Weed
  • Cabomba
  • Salvinia


Source: City Of Gold Coast Website, 2015


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Australian Cockroach – Periplaneta australasiae

Description:        The Australian Cockroach is one of the largest pest cockroaches that invades our homes and is around 4cm long.  This cockroach is not native to our country as the name suggests, but was introduced here from Africa several centuries ago.  It has since been spread throughout much of the world through trade and human activity.  In Australia, we also have the American Cockroach, which is almost identical to the Australian Cockroach.  The Australian Cockroach can be found in any warm, moist areas and will often live outdoors in wood piles, compost bins, mulch and hollow logs.  However, many will venture into our homes in search of food, water and to shelter from extreme weather.  In our houses they prefer warm, dark places such as water pipes, sinks, toilets, inside cupboards, under fridges & stoves and even inside electrical appliances such as TV’s, microwaves and telephones!

A male Australian Cockroach

Life Cycle:        Female Australian Cockroaches lay their eggs in a small purse-shaped case called an ootheca.  Each one contains around 14-16 eggs.  On average a female will lay one ootheca per month, but they have been known to produce several a week!  The ootheca is either dropped onto the ground, or glued onto a flat surface.

Favourite foods:    The Australian Cockroach is omnivorous, which means they can eat pretty much anything!  Outdoors, they will forage on decaying animal and vegetable matter, but they will often come into our houses to scavenge for food scraps.  The Australian Cockroach has a bit of a sweet tooth, so loves fruit, honey or anything sugary.  They have also been known to eat hair, leather shoes, animal hides, dead insects, nail clippings, book bindings and paper.

Defence tactics:    Australian cockroaches are one of the fastest insects on the planet.  When threatened by a predator the cockroach runs and can cover a distance of one meter in a single second!  That’s fast!  The Australian cockroach also has a slippery wax called a cuticle covering its body.  This helps it to wiggle into small cracks and cervices where it can hide from danger.  This wax has a very distinctive scent and is the reason why large infestations of cockroaches often smell really bad!

The long spiny legs of the Australian Cockroach help it run very fast over just about any kind of surface.

Fascinating Facts:
•    The Australian Cockroach has excellent hearing.  Their ears are located on each knee joint of their six legs and are so sensitive that they can detect earthquakes that measure a mere 0.07 on the Richter Scale.
•    Their antennae are comprised of 356 segments, with each one responsible for picking up certain messages from their environment.
•    The Australian Cockroach has excellent vision and can even see in infrared!

Gold Coast Pest Control Services

Gold Coast Pest Control Services



Rats and mice

In Queensland, there could be up to twenty-four native species of rodents. However, it is the three introduced species that have become such pests to society:

  • Brown Rat (or Sewer Rat): a burrower, is thick set and brown in colour.
  • Roof Rat: a climber, is slender and black in colour.
  • House Mouse: can be distinguished by its small size.

The presence of rats and mice in buildings can result in food spoilage and contamination, physical damage caused by gnawing which can sometimes lead to costly fires, and the transmission of diseases to humans.

The most common disease transmitted by rats is Salmonellosis which is spread when food is consumed by humans which has been contaminated by excreta or saliva of rats.

In Queensland, introduced rats have been associated with the spread of Plague (the last outbreak being in 1923), Weils Disease, Rat Bite Fever, Murine Typhus and a form of Meningitis, all of which may result in serious illness or death. (Note: Plague and Murine Typhus are transmitted by rat fleas.)

How do you detect rodents?

  • damage to food containers or droppings
  • rat runs (lines in the dust or greasy smears on walls and fences worn by the rat)
  • disappearance of food
  • sounds during the night
  • gnaw marks or burrows.

(Source: City of Gold Coast Offical Website 2015)


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A long-lived grass-like plant with long underground runners and upright flowering stems up to 40 cm tall. Its upright stems are three-angled in cross-section and only 0.5-1.5 mm thick. Its bright green leaves (1-3 mm wide) are hairless and sheath the stem at the base. Its pale green seed-heads (6-7 mm long) have three or four green leafy bracts at the base and contain numerous small flower spikelets. Its ‘seeds’ are yellow to reddish-brown in colour and topped with a small projection 1-1.5 mm long.

Also known as: Globe kyllinga, Perennial greenhead sedge, Short-leaf flatsedge,



Year round


This species is widespread in the tropical, sub-tropical and warmer temperate regions of the world and its exact origin in obscure. However, some authors believe it to be native to tropical Asia and the warmer temperate regions of China and Japan.


SIL – Special Investigation List

This species is very widely naturalised in the coastal and sub-coastal regions of Australia. It is particularly common in the northern and eastern parts of the country (i.e. in the northern parts of Western Australia and the Northern Territory, insouth-eastern, central and northern Queensland, in eastern New South Wales and in the ACT).

A widespread weed that prefers damp and shady habitats. It is most commonly found in gardens, footpaths, lawns, roadsides, pastures, disturbed sites and waste areas, but is also a weed of riparian vegetation, wetlands and some crops.

A long-lived (i.e. perennial) grass-like plant with long underground runners (i.e. rhizomes) and upright flowering stems 5-40 cm tall.

(Source: brisbane.qld.gov.au 2015) http://ow.ly/i/dd7Zk

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