Scientists hope hungry black weevils imported from Louisiana can help tackle South Africa's invasive water plant problem.

Some varieties, including Christmas fern, seem to be tolerant of juglone, the plant-harming compound produced by black walnut trees and a few of its close relatives. Read the original article on ...

Dozens of tiny black weevils cling onto a fern plant as it is tossed onto a leafy green mat coating the surface of South Africa's Crocodile River. Those weevils aren't tossed into the river by ...