Spring Weeds – Puncturevine

Puncturevine 1

Puncturevine, also known as “Goatheads” is an annual that grows fast in dense, flat mats ranging from 2’ to 5’. It is a noxious weed in Nevada. It grows from the tap root on long trailing, highly branched stems. The leaves are 1” to 2” long and hairy. The flowers are tiny and bright yellow. They have 5 petals. Puncturevine grows in a variety of soil types. It can be found in croplands, pastures, roadsides and home landscapes. The plant spreads by seeds. The seed pods are a hard pod with four sharp points that can injury people, pets, horses, and puncture tires of bicycles. The sharp points are arranged so that a spike is usually pointing up. A plant can produce 200 to 5,000 seeds a year.

How to remove:
For homeowners, hand-pulling is best when the vines are sufficiently long, but before the plant flowers and produces seeds. Hoeing can also kill an existing plant. Tilling may bury seeds that will then be favorable for propagation.
For further information, contact the Cooperative Extension at 702.397.2604

Written Resources:
Nevada Noxious Weed Guide

Click to access nevada_noxious_weed_field_guide.pdf

University of Nevada Cooperative Extension Fact Sheet

Click to access FS0334.pdf

University of California Integrated Pest Management
http://ipm.ucanr.edu/PMG/PESTNOTES/pn74128.html

Post written by:

Peggy Raines – Horticulture Instructor

UNCE Northeast Clark County

(702)397-2604 ex.4

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