A scanning electron microscope reveals nematodes (highlighted in green) inside the spongy mesophyll of a European beech (Fagus sylvatica) leaf infected with beech leaf disease (BLD). Eggs are marked ...

Beech leaf disease has already made its way to 15 states and into Ontario, with alarming results. By Margaret Roach I am hardly alone among gardeners who have called upon a copper-leaved European ...

In the early part of the 20th century, the American chestnut was ravaged by an invasive fungus that arrived from Asia. That fungus made the American chestnut functionally extinct, and although some ...