Louisiana Home Lawn Series: Dandelion

Jeffrey Beasley, Strahan, Ronald E., Voitier, Matthew, Sanders, Kayla  |  1/24/2019 9:38:04 PM

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Description

Dandelion (Taraxacum officinale F.H. Wigg.) is a cool-season, perennial broadleaf weed common throughout Louisiana. It can spread through seed and through root fragments. The weed produces bright yellow flowers, which are typically observed beginning in the spring. Dandelion has a thick, deep taproot that allows it to thrive in turfgrass, especially in areas where turfgrass is weak.

Image of a Dandelion


Identification

Dandelion has long, narrow, deeply lobed leaves that form a rosette at the base of the plant. Leaves are typically green but can be purple toward the base. Single yellow flowers emerge from the center of the rosette on long, hollow stalks. As a flower matures, seeds — each with a tuft of hairs — form a spherical “puff ball” on the flower stalk. The hairs on the seed allow the seeds to be carried away by the wind. Both the leaves and the flower stalks exude a milky sap when broken. For more information on dandelion identification and characterization, visit the USDA Plants Database at https://plants.usda.gov.

Image that shows deeply lobed leaf, yellow flower, and seed head.


Cultural Control Practices

The best way to prevent or reduce weed encroachment is to maintain a healthy lawn through proper fertilization and soil pH and regular mowing. Properly maintaining a lawn through these cultural practices promotes dense and vigorous turfgrass, allowing it to better compete with weeds. Below are the recommended mowing heights and nitrogen fertility rates recommended for each turfgrass species. In addition to these lawn care practices, manual removal of weeds may also be necessary.

Table that shows the mowing height and nitrogen rate for bermudagrass, centipedgrass, st. augustine grass, and zoysia.


Chemical Control Practices

In addition to cultural practices, herbicide applications may be required to achieve effective weed control. Dandelion is a perennial broadleaf weed that is readily controlled by post-emergence herbicides, especially those containing 2,4-D.

When applying any type of herbicide, you must follow the manufacturer's labeled directions. For more information regarding pesticides for turfgrass, please reference the Louisiana Suggested Chemical Weed Control Guide at the LSU AgCenter website www.lsuagcenter.com.

Table that shows the postemergence herbicide active ingredients for bermudagrass, centipedgrass, st. augustine grass, and zoysia.


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