
The SciencesOctober 1, 1989
Waterweed Invasions
Vast vegetative mats of the two most noxious aquatic weeds plague the world's waterways. Investigations of the water hyacinth and the kariba weed are leading to new programs for weed control

Waterweed Invasions
Vast vegetative mats of the two most noxious aquatic weeds plague the world's waterways. Investigations of the water hyacinth and the kariba weed are leading to new programs for weed control

Mimicry in Plants
There are flowers that look like insects and weeds that masquerade as crop plants. Mimicry in plants results from natural selection: it attracts pollinators or deters predators