Helicopters to spray buffelgrass in Saguaro National Park - WTOC-TV: Savannah, Beaufort, SC, News, Weather & Sports

Helicopters to spray buffelgrass in Saguaro National Park

TUCSON, AZ (Tucson News Now) -

Some trails in Saguaro National Park will be closed as crews take to the air to deal with an alien invader, beginning Tuesday, Aug. 19.

The Park Service said it's going to start helicopter flights to spray for buffelgrass in areas that are too remote or rugged to reach on foot. Ranchers introduced the African grass for cattle grazing nearly a century ago, but it has now spread across much of Southern Arizona.

It chokes out native plants and it poses a fire hazard. Herbicide only works on buffelgrass when it greens up during the monsoon.

The helicopter spraying is expected to run through Aug. 26.

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