Hello from the Atlas Mountains in Morocco,

I hope somebody on the list can help me find the reason our two-year pear
trees produce a honey-like sticky substance.

I was told it is pear psyllia, but I do not see any insects on the trees.

Somebody else suspected gummosis.  I am familiar with gummosis on cherry
trees, but the sap we see on the pear trees is less viscous, and forms only
a thin layer that drips on leaves.

Thanks for your help,
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