• Blackspot_close_up_rose_leaf

Black Spot

A very common disease on roses. Black spots with yellow fringes spread quickly over the plant. Premature leaf fall may occur.  Black Spot becomes visible July/August with heavy infections spreading to leaf buds and later to the stems which then die back.  Premature leaf drop will occur.

Cultural measures: Remove and destroy fallen infected leaves.   Encouraged by a shortage of potash and warm, wet summer weather.  Feed with a plant food high in Potassium such as Toprose.  Consider growing rose varieties that have been bred to show resistance to black spot.

Product solution: Spray with Systhane Fungus Fighter,  Fungus Fighter Disease Control or Multirose Concentrate 2.

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