1. Gnomonia ulmea (Schw.) Thüm., the cause of the most common elm leaf spot in America, has been reported as occurring on five of the six native species of elm in this country and is of wide ...

Struggling to work out why your houseplant has brown spots on its leaves? Read this. Frustratingly, there are a number of reasons why a houseplant might develop brown spots – and each requires a ...