- Associated Press - Wednesday, July 16, 2014

TUCSON, Ariz. (AP) - Saguaro National Park officials they’ll take advantage of increased moisture from monsoon rains to resume work to restore native vegetation in the park on Tucson’s outskirts.

Crews will apply herbicide on buffelgrass, a non-native grass that competes with saguaro cactuses, palo verde trees and other plants native to the Sonoran Desert.

Park officials say buffelgrass continues to spread in the park and poses a serious threat to biological conservation efforts. It’s list as a noxious weed by the state.

According to park officials, the increased moisture levels create optimal conditions for applying herbicide. It’ll be dyed-blue and applied along roads and in other areas over the next several months.

Ground crews will do most of the spraying but helicopters will be used to treat patches in steep, remote areas.

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