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Healthy Livestock - Healthy Land: July 8 at 101 Livestock

Healthy Livestock Workshop Poster

The Livestock and Land program works with livestock owners to promote environmental stewardship on livestock properties. They are having a workshop...

Posted on Saturday, June 24, 2017 at 5:41 PM

Why We Need to Push for Pollinator Protection

Entomologist May Berenbaum  photographs a bee on a pomegranate tree at the UC Davis bee garden, the Häagen-Dazs Honey Bee Haven, during her May 2014 visit to the campus. With her is Extension apiculturist Eric Mussen, now retired. (Photo by Kathy Keatley Garvey)

The 10th annual National Pollinator Week ends Sunday, June 25, and what an opportunity it's been to showcase our pollinators! As noted...

Posted on Friday, June 23, 2017 at 4:15 PM

Future water leaders soak up irrigation information

University of California students are taking a long journey through California to trace the state's complicated and critical water supply. The recent graduates and upper-division co-eds from UC Merced, UC Santa Cruz, UC Berkeley and UC Davis are part of the UC Water Academy, a course that combines online training with a two-week field trip for first-hand knowledge about California water.

The tour began June 18 at Lake Shasta, the state's largest reservoir, and followed the water's course to the Sacramento Valley, through the Sacramento-San Joaquin Delta and south along the Delta-Mendota Canal. Since a key water destination is agriculture, the UC Water Academy toured the UC Kearney Agricultural Research and Extension June 23, where research is underway to determine how the state's water supply can be most efficiently transformed into a food supply for Americans.

Traveling in two vans, 10 students, a teachers' assistant and two professors are following the course of California water.

“You're visiting a place ideal for growing high-quality fruits and vegetables, because of the Mediterranean climate and low insect and disease pressure,” said Jeff Dahlberg, director of the UC KREC.

Kearney director Jeff Dahlberg leads a tour.

UC Cooperative Extension water management specialist Khaled Bali joined the students next to his alfalfa research plot, where different irrigation regimens are compared to determine the maximum yield that can be harvested with the minimum amount of water.

“It used to be that the No. 1 objective was to maximize yield,” Bali said. “But with the limited supplies and the cost of water, now the No. 1 objective is to get the maximum economic return. Growers might be better off selling some of their water to other jurisdictions.”

UCCE water management specialist Khaled Bali speaks about his alfalfa irrigation research.

A water tour wouldn't be complete without an introduction to drought research. A recently planted sorghum trial provided the backdrop.

“California is a great place to study drought tolerance,” Dahlberg said, “because you can induce a drought by withholding irrigation.”

UC Berkeley student Chelsee Andreozzi, right, asks a question while Tessa Maurer takes notes on a smart phone. UCB student Brian Kastl is in the background.

The sizable field contains 1,800 plots with 600 sorghum cultivars under three irrigation schemes: one irrigated as usual, one in which water is cut off before the plants flower, and the final one where water is cut off after the plants flower.

“Every week, a drone flies over to collect data on the leaf area, plant height and biomass,” Dalberg said. “Hopefully we will get associations with gene expression and this phenotype data. “

Recently emerged sorghum that is part of a trial aiming to tease out the genes that express drought tolerance.

Dahlberg and his collaborating researchers believe identifying the genes responsible for drought tolerance in sorghum will help scientists find drought-tolerant genes in other cereal crops – such as wheat, corn, rice and millet. “This will go a long way to feeding the people of the world,” he said.

There is still much to learn about sorghum drought tolerance – is it conferred by the plant's waxy leaves, the way stomata are controlled, accumulation of sugar in the leaves, or a mechanism in the roots?

“These are all questions you will have to answer to feed the world,” Dahlberg said. “That's why I would encourage you to continue studying water. There's a lot for you to get into.”

Students gather in the post harvest laboratory at Kearney.

A third-year earth science student at UC Santa Cruz and a member of the academy, Denise Payan, said the sense of responsibility for the future is not daunting, but encouraging.

“It makes me feel like I can make a difference,” she said. The tour through California is shaping her plans for the future, which may include a career at the intersection of geology and biology.

“This has opened my eyes to a lot of issues,” she said.

The next stop for the UC Water Academy is the vast Tulare Lake basin to learn about groundwater recharge before heading east to the Owens Valley and the shores of Mono Lake. From there the academy turns to the Sierra Nevada to visit San Francisco's water supply, which is collected by Hetch Hetchy Dam. The field trip ends with a two-day rafting trip on the American River.

The UC Water Academy is offered through UC Water and led by UC Merced professor Joshua Viers and UC Cooperative Extension water management specialist Ted Grantham. In addition to the two-week tour, students participated in weekly online meetings and complete a project on communicating California water issues to public stakeholders. Students receive 1 unit of academic credit.

Posted on Friday, June 23, 2017 at 2:29 PM
Tags: Jeff Dahlberg (12), Khaled Bali (6), water (69)

Kate Frey: How to Attract Pollinators

Award-winning garden designer, author and pollinator specialist Kate Frey addresses a recent crowd at Annie's Annuals and Perennials. Her topic:

It's National Pollinator Week and you might be wondering where your pollinators are.  “I'd love to attract honey bees, bumble bees and...

Who Wrecked the Wisteria?

My sister gave me some wisteria seedlings a few years ago.  She has a beautiful specimen that completely covers her patio cover.  In spring the blossoms are breath-taking.  The plant is over 20 years old and is almost like one of the family.

The initial pot of seedlings didn't fare too well.  I lost 2 of the 3 seedlings fairly quickly and the third seedling grew very slowly.  Last year it finally seemed to pick up speed.  It looked healthy with some lovely foliage.  But the next time I looked, the leaves had been chewed to bits.  I didn't see any insects.

At that point, I admit it, I gave up.  I chucked the plant along the back wall in the back yard, thinking I would probably reuse the pot soon.  It didn't get any care or watering from me. I completely forgot about it.

This spring I was completely surprised to see the little plant growing again.  I put him into a bigger pot and he really took off. He had lovely green leaves and vines.  I decided to try and turn him into a cascading wisteria tree, so I made a few snips to accomplish that end. Things were going swimmingly. 

Then some chewed leaves started appearing.  I hit the books but all the pests listed for wisteria were insects with sucking mouthparts.  That just wasn't the type of damage I was seeing.

Then I decided that maybe it wasn't chewing damage but tattering from the wind.  I moved the wisteria to a more protected location.  Things seemed to improve so I thought I had solved the problem.

But then the chewing damage began to appear again.  I began to check the plant frequently, and at different times of the day.  Finally I spotted a cucumber beetle nestled in the chewed leaves.  I removed him.  Some of my Master Gardener friends were not convinced.  They thought perhaps the cucumber beetle was just resting there on his way to my vegetable garden.

I agreed to keep an open mind and continue observing.  But then a few days later I saw another cucumber beetle amidst the chewed leaves.  I think he is definitely the culprit.  At this point since there doesn't seem to be a huge infestation, I am going to observe and hand pick any beetles off.

Wisteria damage (photos by Karen Metz)

Posted on Thursday, June 22, 2017 at 10:30 AM

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