Found In Florida: Notorious Noxious Weed Makes Way To U.S.

Chrysopogon aciculatus

Chrysopogon aciculatus, a perennial grass known as golden false beardgrass, lovegrass, or Mackie’s pest was recently detected in Miami-Dade County. This plant, a federally listed noxious weed, has not previously been reported to be established in the Continental U.S., although it is found in Hawaii. It is a serious agricultural and environmental weed, particularly in the Old World tropics, and is included on the Noxious Weed Lists of USDA and several states, including Florida. This grass was found near the Homestead Air Reserve Base and was subsequently mowed and treated with herbicide. Initial surveys of the nearby environs have located no additional outbreaks. 

This perennial grass grows by stolons that spread quickly over the soil or become buried shallowly in the soil. Leafy, sterile, short shoots may grow from the stolons as well as fertile stems 15 to 25 centimeters (cm) tall with leaf sheaths that can have pale stripes of green and white or darker and lighter green or with hints of purple. The leaf blades are 2 to 8 cm long, 3 to 5 millimeters (mm) wide, with rough edges.

The inflorescence is a panicle, 3 to 6 cm long, with a red-purple color. The branches of the panicle are whorled and held stiffly upward. The spikelet clusters are 6 to 8 mm long, and break from the pedicel (flower stalk) along a diagonal ridge covered with golden brown hairs that becomes a needle-like, bearded barb about 3 to 7 mm long. The seed or grain is about 2 mm long. The barb remains attached to the seed to aid in its spread in fur or on clothing.

This grass might be similar to a number of other grasses, depending on the life stage and frequency of mowing where it is found. In flower, this species could appear to be a miniature Johnson grass, but if the area has been recently mowed, the grass might resemble St. Augustine grass.

The grass is usually found in sunny, dry, exposed areas such as roadsides, lawns and pastures. It is native to tropical India and China, and perhaps parts of the Pacific region, but has been widely introduced in other tropical areas of Asia, Australia, and the Pacific. This grass has been used as a groundcover or turfgrass, in spite of the potential hazard when it is allowed to produce seeds.

Chrysopogon aciculatus has the potential to spread quickly as the creeping stolons grow over open areas. The grass can tolerate grazing, mowing, and trampling by animals. This grass can be difficult to eradicate, and therefore costly, if it becomes established.

This grass is difficult to identify unless flowers are present. When in flower, the grass can be recognized by the combination of short, leafy shoots and a taller sheath with an inflorescence of whorled branches with purple flowers. Control of weedy perennial grasses usually requires the application of herbicides.

Topics:

Leave a Reply

Featured Stories
upclose of Israeli apple harvester
Fruits
May 28, 2016
Orchard Automation Is On The Horizon
Industry experts say the advent of fully automated orchard tasks are on the cusp of happening — with a few companies leading the automotive harvest charge. Read More
IFTA Washington Day3 6
Apples & Pears
May 27, 2016
Washington Apple Commission Elects New Leaders
The commission board also approved the export budget of $7.7 million for the upcoming 2016-17 crop, based on a crop of 135 million cartons. Read More
As this view of the San Luis Reservoir shows, California's drought is far from over. (Photo credit: David Eddy)
Fruits
May 27, 2016
California Drought Far From Over For
To preserve orchards and vineyards, growers are expected to fallow up to 350,000 acres of corn, wheat, cotton and alfalfa. Read More
These workers use a platform from Automated Ag for hand thinning. (Photo credit: Christina Herrick)
Apples & Pears
May 27, 2016
How Best To Integrate Man And Machine
If you want to implement labor-saving mechanization, you should start the conversation with the end user – your employees. Read More
Crowd protesting GMOs stock image FEATURE
Farm Marketing
May 27, 2016
Consumers Don’t Really Know What GMO Means, New Study Finds
A study from the University of Florida confirms what many farm marketers suspected: consumers don't understand genetically modified food and organisms as well as they think they do. In fact, 80% of consumers think food containing DNA should be labeled (almost as many who think GMO food should be labeled). Read More
Asian citrus psyllid closeup
Insect & Disease Update
May 27, 2016
Alabama Agriculture Department To Conduct Citrus Psyllid Survey
Currently, Alabama is the only citrus-growing state that has not yet detected citrus greening. Read More
Ready To Spring
Insect Control
May 26, 2016
Temperature, Location Key To Predicting Leaffooted Bug Pressure
This year, leaffooted bugs are expected to be a significant problem in almonds and pistachios, but watching temperature and the Read More
First-year impact of Prunus replant disease at the Firebaugh replant trial; stunted trees in the foreground row were planted in plot of non-fumigated replant soil. (Photo credit: University of California Agriculture)
Fruits
May 26, 2016
Consider Fumigating For Nematodes Before Replanting Almonds, Stone Fruit
Stone fruit and almond growers looking to replant orchards might want to invest in soil samples to assess nematode populations Read More
An open air farm dinner at Tangletown's farm FEATURE
Farm Marketing
May 26, 2016
Farm Dinners: Your Most Powerful Marketing Tool?
Farm dinners are a hassle. They’re expensive. And ridiculously effective. Read More
The Latest
Fruits
May 28, 2016
Orchard Automation Is On The Horizon
Industry experts say the advent of fully automated orchard tasks are on the cusp of happening — with a few companies leading the automotive harvest charge. Read More
Apples & Pears
May 27, 2016
Washington Apple Commission Elects New L…
The commission board also approved the export budget of $7.7 million for the upcoming 2016-17 crop, based on a crop of 135 million cartons. Read More
Fruits
May 27, 2016
California Drought Far From Over For
To preserve orchards and vineyards, growers are expected to fallow up to 350,000 acres of corn, wheat, cotton and alfalfa. Read More
Apples & Pears
May 27, 2016
How Best To Integrate Man And Machine
If you want to implement labor-saving mechanization, you should start the conversation with the end user – your employees. Read More
Farm Marketing
May 27, 2016
Consumers Don’t Really Know What G…
A study from the University of Florida confirms what many farm marketers suspected: consumers don't understand genetically modified food and organisms as well as they think they do. In fact, 80% of consumers think food containing DNA should be labeled (almost as many who think GMO food should be labeled). Read More
Insect & Disease Update
May 27, 2016
Alabama Agriculture Department To Conduc…
Currently, Alabama is the only citrus-growing state that has not yet detected citrus greening. Read More
Insect Control
May 26, 2016
Temperature, Location Key To Predicting …
This year, leaffooted bugs are expected to be a significant problem in almonds and pistachios, but watching temperature and the Read More
Fruits
May 26, 2016
Consider Fumigating For Nematodes Before…
Stone fruit and almond growers looking to replant orchards might want to invest in soil samples to assess nematode populations Read More
Farm Marketing
May 26, 2016
Who Grows Organically — And Who Doesn…
We surveyed 816 fruit and vegetable growers and found that farm marketers and vegetable growers are much more likely than their peers to embrace the practice. Read More
Farm Marketing
May 26, 2016
Farm Dinners: Your Most Powerful Marketi…
Farm dinners are a hassle. They’re expensive. And ridiculously effective. Read More
Cucurbits
May 25, 2016
Whitefly Threat Has Florida Growers On H…
Researchers, state agencies working together to prevent a potential outbreak. Read More
Crop Protection
May 25, 2016
More Apps Help Growers Identify Insects …
Berries, apples, pears, and cherries now rolled into new app series from Clemson University. Read More
Citrus
May 25, 2016
Monsanto Says Bayer Bid ‘Financially Ina…
Proposal cited as undervalued, not able to address financial, regulatory risks. Read More
Stone Fruit
May 25, 2016
Researchers Study Why Cherry Cracking Af…
German researchers studied how water uptake and fruit skin determined a cultivar’s susceptibility to cherry cracking. Read More
Farm Management
May 25, 2016
Report Highlights Benefits Of Trans-Paci…
National Potato Council says report from the International Trade Commission offers the benefits the free trade agreement would offer growers. Read More
Fruits
May 25, 2016
Farm Bureau Says EPA, Army Corps Of Engi…
AFBF told Congress that the Army Corps' novel interpretations of environmental law are threatening farmers in California and other areas of the country. Read More
Citrus
May 25, 2016
NRCS Invests $4.3 Million To Combat Clim…
The Natural Resources Conservation Service in California is committing funds to help farmers and ranchers mitigate the effects of climate change and help to reduce greenhouse gas emissions. Read More
Citrus
May 24, 2016
Panama Canal Expansion To Bring Trade Op…
Agriculture Commissioner Adam Putnam says a confluence of events is putting the state's producers in a good spot to open new markets. Read More
[gravityform id="62" title="false" description="false"]