Devil's Claw (Martynia annua)
Devils claw infestation at Agate creek
Devil’s claw is declared a Class A (to be eradicated) and Class C (not to be introduced to the Northern Territory) weed in accordance with the NT Weeds Management Act 2001.
Devil’s claw is native to Central and South America. It was first identified in the Northern Territory in the Pine Creek area during the early gold mining days. It was recognised as being present in Katherine after World War ІІ, and subsequent spread has resulted in infestations occurring in the Katherine, Pine Creek and Victoria River Districts. Devil’s claw prefers disturbed ground, and is often found in high-use areas such as around stockyards, buildings and along roadsides.
The large, bell-shaped flowers are white to pink in colour and about 5 cm long. The throat of the flower is red with yellow spots. When seed capsules form they are initially covered with a fleshy green skin and a curved beak which splits when mature exposing the “claws”. The mature capsule is very hard, grey to black in colour and 3 to 4 cm long.
The spined seed capsules can injure and cause discomfort to livestock and native animals. The capsules can be spread by animals and by attaching to vehicles, clothing and machinery. Most seed will germinate within the first two years after forming, however some will remain preserved in the capsules for five years or more. In order to eradicate this species a control program spanning five to ten years is required.
Devil's claw flower
