White Mold On Laurel Leaves

Question

Hi, our neighbour next door has a weeping birch which is riddled with some kind of blight. We have Laurel hedging along the fence where their tree over hangs and has infected all our laurel in the garden plus our Portuguese laurel trees with some form of white mold. We’ve cut all the infected leaves off but each time the new growth grows its all infected again. I was recommended to spray a mild solution of bicarbonate of soda in water with a drip of oil, but this hasn’t worked. I’m really desperate as the entire hedging and all my trees are now infected!! Please help what can I do to stop this from killing my hedging and trees?? Also the laurel at the front of the house seems to be dying hence the yellow leaves it doesn’t need what is it all the dogs pee killing it?

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Answer 1

If dogs pee near it... This will, definitely, be the cause. Not only does it knock the pH off, but it will throw nitrogen and ammonia levels through the roof. Any molds in the area will take hold and quickly kill a weakened tree.

I would use heavier fungicides, though. Copper based fungicides will be best. This article will help:

https://www.gardeningknowhow.com/garden-how-to/info/what-is-copper-fungicide.htm

Here are some articles to help test your soil:

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/test-soil-for-pests-and-diseases.htm