User:Woraluck

Cyperus rotundus L.

Scientific name: Cyperus rotundus L.

Common name(s): Nut grass, Coco-grass, Purple nutsedge, and in some places, it’s also known as Java grass.

Family name: Cyperaceae

Origin & Distribution: Cyperus rotundus is originally native to Africa, Southern and Central Europe, and Southern Asia. Over time, it has spread to many tropical, subtropical, and temperate regions worldwide, making its exact native range difficult to determine due to widespread cultivation and naturalization.

Current Status of the Invasiveness: In various countries, particularly in Southeast Asia and Thailand, Cyperus rotundus is considered an invasive species. Its capability to adapt to a wide range of environmental conditions, along with its aggressive growth habit and prolific reproduction, makes it a problematic weed in agricultural and non-agricultural lands.

Southeast Asia: In this region, including countries like Indonesia, Malaysia, and the Philippines, Cyperus rotundus is a common invasive species in crops, plantations, gardens, and along roadsides. Its presence can significantly reduce crop yields and make cultivation more challenging. The weed competes with crops for nutrients, light, and space, and is difficult to eradicate once established.

Thailand: Similarly, in Thailand, it's known to invade agricultural areas, especially rice paddies, sugarcane fields, and vegetable gardens, causing substantial economic losses. Its tubers can survive under harsh conditions, making control and eradication efforts difficult. The weed's resilience to common herbicides and its ability to spread rapidly through both seeds and underground tubers contribute to its invasive status.