Yellow/Black Leaves On Pear Tree.

Question

These yellow/black leaf markings have appeared on my young pear tree overnight. Any help identifying / treting the problem would be appreciated.

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Answer 1

This is common with nutrient burn. If the tree has been fed, recently, it may have been too much or improperly balanced.

If there has been no feeding recently, I would say that overwatering could be an issue. This will not appear overnight, however.

Here are some articles that will help:

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/what-is-fertilizer-burn.htm

https://www.gardeningknowhow.com/special/organic/biofungicide-information.htm

https://www.gardeningknowhow.com/edible/fruits/pear/growing-pear-trees.htm