Don’t jump to the conclusion that those mysterious marks are evidence of disease. They may be leaf mines or galls — and that’s a good thing. 13 Photos View Slide Show › By Margaret Roach ...

A single large pin oak tree can rain down up to 400,000 oak leaf itch mites per day. Oak mites can live through the winter in protected areas or within leaves/leaf litter on the ground.

It’s fairly common in fall to see yellowing and browning leaves on Oregon white oak. The color change can also be due to normal attacks from other insects, such as gall-making flies and wasps ...

Leaf miners are just one of the many pests that affect our gardens. The two leaf miner types most often found in Marin are the Liriomyza spp. and Phytomyza.