Because black spot fungus develops due to excess moisture ... will need to use a combination of at least two different fungal ...

With spring in full swing and the sun making a welcome appearance, gardeners are being cautioned that the warmer weather could bring about diseases like black spot, which poses a real threat to roses.

April's typical warm and rainy spells provide perfect conditions for black spot disease, a fungus that spreads through water. The disease manifests at the base of the plant as circular black marks on ...

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 ...