Forests

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Los beneficios de los arboles urbanos
Water Supply Security (WSS): Article

Árboles Urbanos y su Papel en la Gestión de Aguas Pluviales

June 4, 2025
By Erik C Porse, Esther N Lofton
 Las copas de los árboles urbanos (UTC), es decir, las capas de hojas, ramas y tallos que cubren el suelo en las ciudades, son herramientas esenciales para gestionar las aguas pluviales, en particular en zonas urbanas densas como las del sur de California. En paisajes dominados por superficies…
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Bugs and Insects

Learn about the good insects and the pesky insects. Manage common problems encountered in Alameda county in both the vegetable garden and landscape/ornamental environment. Learn to spot invasives and how to manage them.
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Wildlife

Learn how to manage animal pests and how to attract wildlife (birds, pollinators, and more).
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Pests

Learn about garden pests, including insects like aphids and earwigs, and wildlife like gophers and deer. Learn how to manage them.
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Invasive species

Invasive insects, plants and animals threaten the health of our gardens and environment. Learn to how to spot invasives and how to report them.
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Diseases

Learn about common problems and diseases of trees and shrubs, including those of fruit trees. Diseases include common fungal problems - peach leaf curl, oak root fungus.
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Cross section of a tree trunk that has trellis-like tunnels throughout. The tunnels are dark stained and go deep into the wood.
Pests in the Urban Landscape: Article

Mediterranean Oak Borer: Questions & Answers

May 28, 2025
By Lauren Fordyce
The Mediterranean Oak Borer (MOB) is an invasive ambrosia beetle that infests several species of white oaks in California: valley oak, blue oak, and Oregon oak. The beetle is spreading rapidly in Northern California counties and there is considerable potential for the beetle's range to expand as they…
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Urban Trees and Their Role/Benefits in Stormwater Management
Water Supply Security (WSS): Article

Urban Trees and Their Role in Stormwater Management

May 28, 2025
By Esther N Lofton, Erik C Porse
Urban tree canopies (UTCs), i.e, the layers of leaves, branches, and stems that cover the ground in cities, are essential tools in managing stormwater, particularly in dense urban areas like those across Southern California. In landscapes dominated by impermeable surfaces such as pavements and rooftops,…
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Thrips/TSWV status in Yolo & Colusa: Article

2025 5th Report-- May 22nd

May 22, 2025
By Patricia A Lazicki, Neil McRoberts
General outlook & thrips populationAs planting wraps up, temperatures remain similar to long-term averages. Thrips population predictions are similar to last week’s update. Generation 2 adults peaked a couple weeks ago; generation three adults are predicted to peak 6/8.  The 3rd and 4th…
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