"Underground Gardening" by Earthworms is Spreading One of the Nation’s Most Irritating Weeds (PRWeb)
Scientists say “underground gardening” by earthworms is contributing to the spread of giant ragweed — a plant that causes irritating sneezes and sniffles and competes with crops. Earthworms help ragweed thrive by collecting and burying the plant’s seeds in their burrows. In fact, research shows more than two-thirds of all giant ragweed plants emerge from the earthworm’s narrow, underground …