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Seeing Spots at the Bohart

The Bohart team includes (front, from left) graduate students Charlotte Herbert and Jessica Gillung and undergraduate student Wade Spencer. In back (from left) are UC Davis biology student Emma Cluff; Tabatha Yang, education and outreach coordinator; Bohart Museum director Lynn Kimsey, professor of entomology; and Steve Heydon, senior museum scientist. (Photo by Kathy Keatley Garvey)

If you walk into the Bohart Museum of Entomology at the University of California, Davis, you'll see spots. No, don't contact your local opthamologist. Contact your local entomologist. This is Bug Country. What's new--and spotted--at the Bohart Museum...

California peaches are in good shape

The warmest winter since 1907 in south-central Texas has left its peach crop with inadequate chill hours this year, reported Lynn Brezosky in the San Antonio Express-News.

Without sufficient chill hours over the winter, the buds didn't get the re-boot they need to bloom in proper synchrony, which is important for blossoms to set fruit. The leaves have also been slow to emerge. "The trees look like it's still winter," said Jim Kamas, Texas A&M AgriLife Extenson horticulturalist.

“The lack of chill hours is a big deal,” said Larry Stein, extension horticulturalist with AgriLife Research & Extension Center.

The Texas trouble combined with a cold blast that destroyed half the crop in Georgia and North Carolina this spring mean peaches are likely to be in short supply this year.

The sweet spot, Brezosky wrote, may be California, the No. 1 peach producer in the nation. Roger Duncan, UC Cooperative Extension pomology adviser, could think of no major problems affecting the southern part of the state's fresh market peach crop.

“I think in general it's probably going to be just fine,” he said.

The Elegant Lady peach is one of many excellent varieties that are produced in abundance by California peach growers.
Posted on Friday, April 21, 2017 at 1:10 PM
Tags: peaches (19), Roger Duncan (14)

Urban Farms: Seed Starting Diseases

Seedling on right has damping off disease. One on left is healthy.

It's beginning to look a lot like spring, so many small growers try to save some money by starting seeds in growing systems and then plant the transplants to get a jump on weeds and other pests like slugs that can decimate a direct-seeded crop. But even the best ideas can sometimes not go as planned.

There are two main pathogens, Pythium and Rhizoctonia, that are the cause of damping-off disease but there are others such as Fusarium and Phytophthora. This disease occurs in newly emerged seedlings, or even as the seeds are just starting to germinate. Damping off is the cause of many seedling losses. It is most notable soon after the seedling emerges. The seedling will seem fine one day and the next it has flopped over at the base and then it dies. We see it a lot this time of year because it is most prevalent in cool and wet conditions.

Damping off is not the same as root rot. Damping off affects the young, succulent stem of the seedlings at or slightly below the soil or media surface while root rot affects the roots.  We generally don't see root rot unless the drainage is bad.

There is no cure for damping off but it can be prevented. The best thing to do is avoid keeping the media very wet and if possible, start the plants in a warm location such as a greenhouse. It is better to mist the media and plants lightly several times a day than water heavily. Misters can be set to go off using timers or one can hand water using “fogger” nozzles.  Do not reuse soil or pots that had plants that died unless sterilized because they now carry the pathogen. 

As plants get past the seedling stage, they are no longer susceptible to damping off but if the soil is still kept wet, root and stem rot can occur.

UC IPM has developed a Pest Note covering damping off and it can be found at http://ipm.ucanr.edu/PMG/PESTNOTES/pn74132.html

Posted on Friday, April 21, 2017 at 8:37 AM

'Show Me the Honey' and 'Show Me the Bugs' at UC Davis Picnic Day

There will be lots to see during Picnic Day at the Bohart Museum of Entomology. These butterflies are among the museum's nearly 8 million insect specimens. (Photo by Kathy Keatley Garvey)

It wouldn't be a picnic without bugs. They are, you know, everywhere. However, when the 103rd annual UC Davis Picnic Day takes place Saturday, April 22, you'll find them primarily at the UC Davis Department of Entomology and Nematology's exhibits...

Posted on Thursday, April 20, 2017 at 5:54 PM

Celebrating the 100th California Naturalist class

Reposted from the UCANR Green Blog

How did we get here and where shall we venture together?

This spring, the 100th California Naturalist class is being offered in Sonoma County – the very same county where we first piloted the curriculum. The UC Agriculture and Natural Resources California Naturalist Program is designed to introduce Californians to the wonders of our unique ecology and engage the public in study and stewardship of California's natural communities. The program mission is to foster a diverse community of naturalists and promote stewardship of California's natural resources through education and service. California Naturalist certification courses combine classroom and field experience in science, problem-solving, communication training and community service. Students are taught by an instructor and team of experts who are affiliated with the University of California, local nature-based centers, community colleges,  land trusts, or natural resource focused agencies such as California State Parks and cooperating “friends groups.”

A California Naturalist explores the creek.

What inspired the first California Naturalist class? Georgia, Florida, Texas and 22 other states have Master Naturalist-like programs, so why not California? After all, California is a global biodiversity hotspot filled with nature enthusiasts. It took a volunteer, Julia Fetherston, to get excited about the potential for a California program before our director Adina Merenlender was convinced to attend the 2005 National Master Naturalist Annual Conference in Estes Park, Colo. She was impressed with the impact these programs were having and decided to see what we could do in the Golden State. A good deal of effort followed to advance the cause within UC, secure grant funding, write the California Naturalist Handbook, develop ways to work with organizations across the state, and build a team to run California Naturalist. In 2012, we officially launched the program with five intrepid institutional partners (Santa Rosa Junior College/Pepperwood Foundation, Pacific Grove Museum of Natural History, UC Santa Cruz Arboretum, UC Berkeley Sagehen Creek Field Station, and Santa Barbara Botanical Garden). Four years later California Naturalist received Program of the Year from the national network, the Alliance of Natural Resource Outreach and Service Programs.

The 100th California Naturalist class is being offered at Stewards of the Coast and Redwood this spring. Stewards of the Coast and Redwoods is a non-profit, environmental and interpretive organization that works in partnership with California State Parks in the Russian River Sector of the Sonoma Mendocino Coast District to support volunteer, education and stewardship programs. Participants in this year's spring class have worked hard on a wide range of capstone projects, including multiple wildlife monitoring citizen science projects, improving fish habitat in the watershed, and creating educational materials on ticks, wetland birds, water quality and more. Co-instructors Meghan Walla-Murphy and David Berman have been teaching California Naturalist courses since 2013, first with Occidental Arts and Ecology Center and now with Stewards. Meghan is the author of Fishing on the Russian River and a well-respected wildlife tracker whose workshops are not to be missed. David is an extraordinary environmental educator, watershed expert, and Project Wild facilitator with the Sonoma County Water Agency.

2017 Stewards of the Coast & Redwoods class at their Bodega Dunes campout.

Now that we have 100 classes under our belt, oh, the places we can go! California Naturalist is a community of practice started deliberately with the goal of gaining natural history knowledge. We are working on releasing a citizen science challenge to provide an opportunity for California Naturalists to discover more about California's ecosystems - Discovery!

Surveys show that California Naturalists feel more empowered to address environmental challenges after their training and knowing they can lean on their fellow naturalists. We would like to know more about how California Naturalists are participating in civic engagement. With a new volunteer management system on the horizon, we plan to learn more about the many ways Naturalists are becoming involved in issues that affect their communities. - Action!

In particular, what activities are Naturalists doing that will help communities and natural ecosystems be more resilient to climate change – improving habitat connectivity, restoring riparian areas, or pre/post fire management?  We are looking for support to start an advanced training aimed at helping today's climate stewards learn more about climate science and adaptation to support their efforts on climate-wise - Stewardship!

Congratulations to the graduates of the 100th California Naturalist class and all those who went before you.

Naturalists from the Mountains Recreation and Conservation Authority's Bridge to Park Careers program.
 
Posted on Thursday, April 20, 2017 at 12:09 PM

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