Eremocarpus is from the Greek eremos for solitary and karpos for fruit and refers to the single seeded fruit.
Setigerus is from the Latin seta for bristle and gero for bearing, referring to the bristly hairs that cover this plant.
Doveweed refers to the greyish colour and texture similar to a dove and the seeds are a favoured food of the Mourning Dove.
Doveweed or turkey mullein (Croton setiger) is a low growing, native annual that thrives in dry, disturbed, open places, such as on Stonebridge Mesa. Even from a distance it can be recognized by the low, tidy mounds of pale green foliage, themselves evenly spaced out into large patches and fields.
The fruit is a dried capsule that splits into two valves from the tip. The outer wall of the capsule consists of two structures and appears two-layered. There is usually a single seed, about 1/8 inch (3-4 mm) long; it is a smooth ellipsoid, somewhat triangular in cross section and variously mottled or striped in tans, browns or grays, or occasionally solid.
Other Common Names:
Plants in the Reserve tend to occur in large, distinctive patches with individual clumps of one or a few plants well separated from one another.
Stonebridge Mesa | June 2019
Species from the genus Croton should not be confused with the colorful, tropical houseplant with the common name croton (Codiaeum variegatum).
Doveweed (Murdannia nudiflora) is a summer annual weed species that belongs to the dayflower family. Over the last three years, this weed has become an important weed problem in residential lawns and sod production.
If we observe doveweed emerging after PRE applications, we have several postemergence (POST) herbicides that will provide control, as long as the plants are less than 2 inches in size and have not produced stolons. Products containing 2,4-D and dicamba can provide fair control of doveweed. However, repeated applications or applications in combination with other herbicides will be required for adequate control. There are commercial products with formulations that combine 2,4-D or dicamba with other herbicides such as mecoprop-p, carfentrazone (Quicksilver™), thiencarbazone and iodosulfuron (e.g., Celsius™, Tribute Total™). This type of three− or four−way combination can provide enhanced doveweed control. If doveweed has fully displaced the turf in spots, it is probably easier and more effective to kill doveweed with a directed application of glyphosate (RoundUp™) and re-seed or re-sod the area.
Doveweed is easier to control before emergence than when plants are well established. Atrazine is one of the most effective herbicides to control doveweed. A maximum rate of 1 lb. of active ingredient (ai) per acre (A) and no more than 2 lb. ai per year are recommended to achieve both adequate control and avoid turfgrass injury. Atrazine should be applied right before or soon after doveweed emerges to maximize control.
For PRE control, S-metolachlor (Pennant Magnum™), dimethenamid-P (Tower™), and indaziflam (Specticle™) are herbicides that can considerably reduce doveweed establishment, especially if the application is done closer to doveweed emergence timing. These herbicides also provide good control of other important weed species such as crabgrass and goosegrass, which emerge earlier in the spring. In order to control early emerging weeds and doveweed, split applications are preferred. For example, the first application is done at the end of February or early March and the second one 4 to 6 weeks after. In this way, we can extend PRE control until doveweed starts emerging.
It is very important to keep in mind that doveweed prefers wet areas, so drainage issues or over-watering will favor the establishment and growth of this weed. For this reason, ensuring irrigation is not excessive is a key management practice to control this problem. Another cultural practice that plays a major role on doveweed management is mowing. Mowing too short and too frequently will favor doveweed because its leaves will grow horizontally avoiding the mower blades. Chose a mowing height that allows good ground cover , yet only removes a third of the turf leaf blades.