Cogongrass discovered in Stanly County

RALEIGH - A small patch of cogongrass, considered by many experts to be one of the world’s worst weeds, was discovered recently in Stanly County by the N.C. Department of Agriculture and Consumer Services.

This is the second confirmed infestation in North Carolina; the first was in Pender County in May 2012.

The Stanly County stand covers an area less than 200 square feet. It is not clear how this small clump started, but cogongrass can easily become established if seeds or rhizomes are transported as a contaminant on equipment or on commodities, such as hay, that are moved from other states where the weed is established. The department’s N.C. Forest Service and Plant Industry Division are surveying land around the infestation and will treat the stand with herbicide.

Cogongrass has surpassed kudzu in the number of acres it covers in the Southeast. The largest infestations are in Alabama, Florida and Mississippi.

Cogongrass was inadvertently introduced into the U.S. in 1912 near Mobile, Ala., arriving in a shipment of Satsuma oranges from Japan that used the grass as packing material. It was also introduced intentionally into Florida and Mississippi as a potential feed, but research trials proved cogongrass unsuitable for that use.

Considered a federal noxious weed, cogongrass has the ability to invade diverse habitats and quickly displace native vegetation, changing the way the ecosystem functions. For example, cogongrass will make longleaf pine communities susceptible to more frequent and hotter wildfires than normal. Even though longleaf pine is adapted to fire, seedlings are unable to tolerate the more frequent and hotter fires created by established cogongrass.

N.C. Forest Service workers discovered the Stanly County infestation during a routine evaluation of a stand of trees that had recently been thinned to improve tree health. It was confirmed by the Plant Industry Division.

Source: NCDA