Trail Closures June 9th &10th

Please notice that Tuesday 9th and Wednesday 10th some sections of the trails in the Preserve will be closed. Volunteers and park rangers will be on location from 7 AM to 3 PM while pesticide application takes place.

Several hundred coast live oak trees in the Preserve and all over San Diego County are infested with Gold spotted oak borer (GSOB). The insect larvae feed under the bark and destroy the cells that transport water and nutrients inside the tree. As adults, they bore a small D-shaped exit hole in the bark to fly and lay eggs on the bark of other oak trees. The GSOB has spread on firewood, so infested wood must not be moved or used as firewood until a tree has been dead for two years. For the past 2 years, the Friends have conducted field surveys recording the location of infested trees in the Preserve, and have sponsored management actions with the goal of slowing but not eliminating the infestations and the tree mortality.