Christian County, Missouri
Note: This information is provided for reference purposes only. Although the information provided here was accurate and current when first created, it is now outdated.
Pesticide Table for the Missouri Bladderpod | About the Missouri Bladderpod
Missouri Map | ESPP Home
Pesticide Table for the Missouri Bladderpod
|Active Ingredient||Product or Trade Name|
|2, 4-D (all forms)||Includes: Crossbow, Dissolve, Envert, Esteron, Formula 40, Hi-Dep, NO-SOL, Salvo, Weed Rhap, Weedar, Weedestroy Triamine, Weedone|
|2, 4-DP (Dichlorprop)||Includes: Weedone 2, 4-DP|
|Atrazine||Includes: AAtrex, Bicep, Bullet, Contour, Extrazine, Guardsman, Harness Xtra, Laddok, Lariat, Marksman, Prompt, Shotgun, Sutazine, Surpass 100|
|Clopyralid||Broadstrike Plus, Stinger, Transline, Confront|
|Dicamba||Includes: Banvel, Clarity, Marksman, Resolve, Trimec, Weedmaster|
|MCPA, MCPB, MCPP||Includes: Acme Brush Killer, Bronate|
|Paraquat||Gramoxone Extra, Starfire|
|Picloram||Access, Pathway, Tordon|
Trade names provided by the University of Missouri Extension Service. For additional information, contact your local University Extension office.
|Do not apply these herbicides within 20 yards (ground application) or within 100 yards (aerial application) of Missouri Bladderpod habitat within the shaded area(s) shown on the map. Missouri Bladderpod habitat is defined as limestone glades; outcrops along roadsides; barrens; pastures with large areas of bare limestone rock; areas with thin, rocky soils; or rocky, open woods. If you are unsure if you have Missouri Bladderpod habitat on property within the shaded area(s), contact your local Natural Resource Conservation Service (NRCS) for assistance.|
Missouri bladderpod [Lesquerella filiformis]
The Missouri bladderpod is a winter annual with numerous erect, hairy stems, measuring about 20 centimeters (8 in) in height. Its distinctive silvery leaves are hairy above and beneath, and are elongated and flat near the base of the plant. In late April or early May, bright yellow flowers with four petals bloom. The seed capsule usually splits open and disperses seeds within four weeks after flowering. This bladderpod has occasionally exhibited unusual growth patterns, growing for one or two seasons, disappearing completely the next year, and then reappearing the following year.
Historically, this plant existed in the five Missouri counties between Springfield and Joplin. The bladderpod's current existence, estimated to be fewer than 5,000 plants in 1986, is limited to just nine scattered sites within only three counties of this historic range. The species is found on private and public lands, including the Wilson's Creek National Battlefield Park which contains one third of the total population of Missouri bladderpods. Several populations also occur on highway rights-of-way.
This endangered plant is found in the unusual habitat of open limestone glades, which are often transistion zones between the prairie and the mature oak forests of the mountainous Ozarks. These glades are extremely uncommon in Missouri, and thus produce highly localized populations of the Missouri bladderpod. The suppression of natural fires in limestone glades have allowed for the conversion of the habitat to woody vegetation, specifically to the eastern red cedar in Missouri. The cedar is an extremely invasive tree that is a significant threat to smaller plants like the Missouri bladderpod which cannot adapt to the shade from the thick cedar canopy. However, succession is not the only threat to the bladderpod. Plants located in parks are subject to the stress of high visitor numbers and occasional collection. Improper timing of roadside maitenance (mowing, herbicides) can damage highway rights-of-way populations.
One way to improve and protect the habitat of the bladderpod and other native glade species is to remove eastern red cedars, allowing the sun to shine directly on the rocky ground year round. It is also important that fire be returned to the landscape to preserve the natural balance of the land. In 1995, the Fish and Wildlife Service, along with the Nature Conservancy and the Missouri Department of Conservation, began working on 90 acres of land adjacent to the Rocky Barrens Natural History Area to remove red cedar and conduct prescribed burns. The efforts produced a stunning success, as evident in the spring of 1997 when the land turned bright yellow with a profusion of Missouri bladderpod. In addition to the use of fire for recovery, the Missouri Botanical Garden is prepared to bring this species into protective cultivation under the guidance of The Center for Plant Conservation.