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Want to report SOD? We’ve got an app for that!

When the great outdoors is your research laboratory, gathering data can be a challenge. To get a broader perspective on the extent of damage caused by sudden oak death, a UC Berkeley Cooperative Extension geographer is using crowd sourcing to enhance her research on the disease that has killed over a million of California’s iconic oak trees since 1995.

Maggi Kelly, UC Berkeley Cooperative Extension specialist, started collecting data from community members through her OakMapper website in 2001. Now she has a mobile application for smartphones


While out in a park or forest, iPhone users can use the new OakMapper mobile app to report sightings of trees killed by Phytophthora ramorum, the plant pathogen that causes SOD. Onsite, participants can note the symptoms they see, such as seeping, bark discoloration, crown discoloration, dead leaves, shoot die-back, fungus, beetle frass and beetle bore holes.

The OakMapper app, created by scientists in the UC Berkeley Geospatial Innovation Facility, uses the phone's built-in GPS to identify the participant’s location when the data is submitted.

They also can describe the environmental setting, such as residential landscape or natural forest.

“Many of the challenging natural resource problems that we face today – like invasive species, fire, climate change – are large in spatial scale and impact diverse public groups,” said Kelly, director of the UC Berkeley Geospatial Innovation Facility. “Addressing these challenges often requires coordinated monitoring, efficient data collection, and increased communication and cooperation between scientists and citizens.

Science can benefit from your powers of observation. We all benefit by becoming informed about problems such as sudden oak death.

If you are like me, a person who sometimes doesn’t recognize coworkers outside the office, you may choose a spectator role. You can use the app to look at the maps to see where SOD is taking down trees.

For more information about OakMapper and its app, visit The OakMapper app can be downloaded for free from the iTunes app store.

I’ve heard of two other apps developed at UC to collect natural resources-related data from other scientists and interested members of the public.

You can use UCLA’s What’s Invasive apps to report locations of top invasive plants and animals, which compete with California’s native fauna and flora. By submitting location data and setting up top invasive lists for your area, you can assist scientists monitoring the spread of the destructive invasive plants and animals. Images and brief descriptions in the app help with identification. The apps are free and available for the Android and iPhone.

Soon you will be able to report roadkill sightings on your iPhone. The UC Davis Road Ecology Center has submitted to the iTunes store an iPhone app for reporting roadkill. Until the app becomes available sometime in January, you can report your observations to the California Roadkill Observation System via the Web at

Another cool app has been developed by the UC Davis Soil Resource Laboratory to deliver information to scientists, growers and gardeners about the properties of their soil. While standing in the field, the user can receive location-based information on a GPS-enabled cell phone. The app is available for free for iPhone and Android OS platforms.

Which science-related apps are you using? You can share them in the comments section or e-mail me at

Posted on Wednesday, December 22, 2010 at 6:33 AM

Discussion of herbicide-resistant weeds - California Weed Science Society

121810 Table 2

This is a reposting of an article I recently wrote for the California Weed Science Society Journal (also reprinted by Western Farm Press).  The article is based on a presentation I made at the California Weed Science Society annual meeting in Visalia...

Posted on Monday, December 20, 2010 at 5:19 PM

California Weed Science Society annual meeting - January 19 in Monterey

63rd Annual ConferenceCalifornia Weed Science SocietyWeed Control: Balancing Biology, Reality & Sustainability Conference dates: January 19, 20 & 21, 2011Portola Plaza HotelTwo Portola PlazaMonterey, CA 93940 (888) 222-5851Click here for...

Posted on Monday, December 20, 2010 at 5:19 PM

Wireless networks could improve state water forecasting

A new wireless data collection system deployed at Duncan Peak, located near the town of Foresthill on the Middle Fork of the American River basin, is part of a new water information system for California. This extensively distributed sensor network will allow for better characterization on the amount of water stored in the snow and the soil throughout the watershed.

This wireless system is part of the research being conducted by University of California researchers as part of the Sierra Nevada Adaptive Management Project (SNAMP) to investigate the impacts of fuels treatment projects on water quality and quantity and how water is routed through catchments. Information collected from these wireless systems includes measurements of snow depth, temperature, relative humidity, soil moisture, and solar radiation. The data will also be integrated into models which will extend the results to areas where no measurements are being made.

UC Professor Roger Bales and a meteorological station data collector.

Using one base station to log all the measurements and broadcast out over the landscape, it connects wirelessly to sensors up to 350 feet away, a distance that can be extended multiple times by placing “hoppers,” or signal relays, between the sensors and base station. This ‘mesh network’ insures multiple readings so no data is lost during transmission. Twenty more base stations are planned for instillation in the American River Basin.

The wireless system is made possible by the development of ultra-low power radios that can run on two AA batteries for up to two years and which can transmit data over long distances using the same technology as a home internet wireless network. This mesh radio network comes from DUST Networks.  Researchers Steve Glaser and Branko Kerkez from UC Berkeley, working with Prof. Roger Bales at UC Merced, have also installed a sensor network at their Critical Zone Observatory research site near Shaver Lake to monitor the same hydrologic variables as in the SNAMP sites. If the wireless system drops out due to extreme conditions, such as a snow storm or other malfunction, no problem! Each sensor also logs to a USB stick, from which the data can also be easily retrieved.

Low power computer components used in the snow depth wireless sensor network.

More precise estimates on water storage within a basin will lead to increasingly accurate predictions of water availability for use in hydropower, irrigation, habitat and household consumption.

Duncan Peak meteorological station.

Posted on Wednesday, December 15, 2010 at 6:40 AM

Effective herbicide concentration for soil activity

Herbicide persistence

This week I received an email request for information on the soil concentration of herbicide necessary to have a phytotoxic effect.  This is a simple-sounding question and I was able to confidently say “Well, that depends….”.  Of course this isn’t a...

Posted on Sunday, December 12, 2010 at 9:52 PM

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