Avoid crowding plants or watering them in the evening, and rotate edibles year to year. Problem: Black spot is a fungal ...

The symptoms of rose black spot and the tobacco mosaic virus (TMV) are shown below. dig up and destroy infected plants wash their hands after handling infected plants wash tools that have come ...

Roses are a stunning feature in any garden, but green-fingered enthusiasts should be vigilant for the dreaded black spot disease, which can wreak havoc on these blooms if not spotted early.

One of the most devastating of these is responsible for a disease called spot blotch, which is caused by a necrotrophic fungus – meaning that it kills infected plant cells – and which is characterized ...