Dawn

Posts Tagged ‘oak disease’

This is what’s happening to the oaks

Thursday, June 24th, 2010

A year ago I asked what’s happening to the oaks round these parts. Suddenly around June, the leaves all seem to turn brown and take on a skeletal look. Last year I thought it might be fungal because I couldn’t see evidence of insects, but now that we’re here full time and have the benefit of catching it in the act of happening, this year it’s clear that it’s not.

Oak Flea Beetle larvae feeding on oak leaves

Oak Flea Beetle larvae

Despite searching on Google for oak leaf miners and the like, so far I’ve been unable to identify this pest. Anyone?

Addendum: Thanks to Miguel (comment below) I’ve discovered that this pest is the Oak Flea Beetle (Altica quercetorum). I’ve also noticed that, like many plants subject to insect attack, water stress plays a part. The oaks in wetter parts of the quinta have far less damage, or even none, while the ones in the driest areas have the most damage.

What's happening to the oaks?

Sunday, June 28th, 2009

(See what happens when it rains? Nothing to do but run the computer batteries down.)

Does anyone know what’s happening to the oaks around these parts? I was concerned to see so much leaf browning when I came back to the quinta this time, and have noticed it on a lot of other oaks in the area. A neighbour said it happened last year too. Whatever it is, it looks fungal. It seems to extend all the way up to the N17 with some really dead looking trees round Coja.

Oak fungal disease?

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